{"id":48,"date":"2012-08-02T16:37:00","date_gmt":"2012-08-02T14:37:00","guid":{"rendered":"http:\/\/viewonphysics.gr\/?p=48"},"modified":"2015-02-23T02:11:47","modified_gmt":"2015-02-23T00:11:47","slug":"%ce%b3%ce%b9%ce%b1%cf%84%ce%af-%cf%80%ce%bf%ce%bb%ce%bb%ce%b1%cf%80%ce%bb%ce%b1%cf%83%ce%b9%ce%ac%ce%b6%ce%bf%cf%85%ce%bc%ce%b5-%ce%bc%ce%b5-g","status":"publish","type":"post","link":"https:\/\/viewonphysics.gr\/?p=48","title":{"rendered":"\u0393\u03b9\u03b1\u03c4\u03af \u03c0\u03bf\u03bb\u03bb\u03b1\u03c0\u03bb\u03b1\u03c3\u03b9\u03ac\u03b6\u03bf\u03c5\u03bc\u03b5 \u03bc\u03b5 g;"},"content":{"rendered":"<ul style=\"text-align: left;\">\n<li><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969); -webkit-text-size-adjust: auto;\"><span lang=\"el\"><span title=\"Jane Bray Nelson, Santa Fe College, Gainesville, FL\"><span style=\"font-family: Helvetica;\">T<\/span><\/span><\/span><span lang=\"el\"><span title=\"Jane Bray Nelson, Santa Fe College, Gainesville, FL\"><span style=\"font-family: Helvetica;\">he Physics Teacher Magazine<\/span><\/span><\/span><\/span><\/li>\n<li><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969); -webkit-text-size-adjust: auto;\"><span lang=\"el\"><span title=\"Jane Bray Nelson, Santa Fe College, Gainesville, FL\"><span style=\"font-family: Helvetica;\">By Jane Bray Nelson, Santa Fe College, Gainesville, FL<\/span><\/span><\/span><\/span><\/li>\n<\/ul>\n<div style=\"color: #38761d; text-align: right;\"><a href=\"http:\/\/wp.me\/a4sIra-tD\" target=\"_blank\"><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969); -webkit-text-size-adjust: auto; font-family: Helvetica;\"><span lang=\"el\"><span title=\"As a new physics teacher, I was explaining how to find\"><i><b>\u03a4\u03bf \u03a6\u03cd\u03bb\u03bb\u03bf \u0395\u03c1\u03b3\u03b1\u03c3\u03af\u03b1\u03c2 \u03b3\u03b9\u03b1 \u03c4\u03bf \u03b5\u03c1\u03b3\u03b1\u03c3\u03c4\u03ae\u03c1\u03b9\u03bf<\/b><\/i> <\/span><\/span><\/span><\/a><\/div>\n<p><span style=\"font-family: Helvetica;\"><span lang=\"el\"><span title=\"As a new physics teacher, I was explaining how to find\">\u03a9\u03c2 \u03bd\u03ad\u03b1 \u03ba\u03b1\u03b8\u03b7\u03b3\u03ae\u03c4\u03c1\u03b9\u03b1 \u03c4\u03b7\u03c2 \u03a6\u03c5\u03c3\u03b9\u03ba\u03ae\u03c2, \u03b5\u03be\u03b7\u03b3\u03bf\u03cd\u03c3\u03b1 \u03c0\u03ce\u03c2 \u03bc\u03c0\u03bf\u03c1\u03b5\u03af \u03ba\u03b1\u03bd\u03b5\u03af\u03c2 \u03bd\u03b1 \u03b2\u03c1\u03b5\u03b9\u00a0<\/span><span title=\"the weight of an object sitting on a table near the\">\u03c4\u03bf \u03b2\u03ac\u03c1\u03bf\u03c2 \u03b5\u03bd\u03cc\u03c2 \u03b1\u03bd\u03c4\u03b9\u03ba\u03b5\u03b9\u03bc\u03ad\u03bd\u03bf\u03c5, \u03c0\u03bf\u03c5 \u03b2\u03c1\u03af\u03c3\u03ba\u03b5\u03c4\u03b1\u03b9 \u03b1\u03ba\u03af\u03bd\u03b7\u03c4\u03bf \u03c0\u03ac\u03bd\u03c9 \u03c3\u03b5 \u03ad\u03bd\u03b1 \u03c4\u03c1\u03b1\u03c0\u03ad\u03b6\u03b9, \u03ba\u03bf\u03bd\u03c4\u03ac \u03c3\u03c4\u03b7\u03bd<\/span><\/span><\/span><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969); -webkit-text-size-adjust: auto; font-family: Helvetica;\"><span lang=\"el\"><span title=\"surface of the Earth.\">\u00a0\u03b5\u03c0\u03b9\u03c6\u03ac\u03bd\u03b5\u03b9\u03b1 \u03c4\u03b7\u03c2 \u0393\u03b7\u03c2.\u00a0<\/span><\/span><\/span><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969); -webkit-text-size-adjust: auto; font-family: Helvetica;\"><span lang=\"el\"><span title=\"It bothered me when a student\"> <\/span><\/span><\/span><\/p>\n<div><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969); -webkit-text-size-adjust: auto; font-family: Helvetica;\"><span lang=\"el\"><span title=\"It bothered me when a student\">\u039c\u03b5 \u03b5\u03bd\u03cc\u03c7\u03bb\u03b7\u03c3\u03b5 \u03cc\u03c4\u03b1\u03bd \u03ad\u03bd\u03b1\u03c2 \u03bc\u03b1\u03b8\u03b7\u03c4\u03ae\u03c2<\/span><span title=\"asked, \u201cThe object is not accelerating so why do you multiply\">\u00a0\u03c1\u03ce\u03c4\u03b7\u03c3\u03b5, &#8220;\u03a4\u03bf \u03b1\u03bd\u03c4\u03b9\u03ba\u03b5\u03af\u03bc\u03b5\u03bd\u03bf \u03b4\u03b5\u03bd \u03b5\u03c0\u03b9\u03c4\u03b1\u03c7\u03cd\u03bd\u03b5\u03c4\u03b1\u03b9, \u03b5\u03c0\u03bf\u03bc\u03ad\u03bd\u03c9\u03c2 \u03b3\u03b9\u03b1\u03c4\u03af \u03c0\u03bf\u03bb\u03bb\u03b1\u03c0\u03bb\u03b1\u03c3\u03b9\u03ac\u03b6\u03bf\u03c5\u03bc\u03b5 \u03c4<\/span><span title=\"the mass of the object by the acceleration due to gravity?\u201d I\">\u03b7 \u03bc\u03ac\u03b6\u03b1 \u03c4\u03bf\u03c5 \u03b1\u03bd\u03c4\u03b9\u03ba\u03b5\u03b9\u03bc\u03ad\u03bd\u03bf\u03c5 \u03bc\u03b5 \u03c4\u03b7\u03bd \u03b5\u03c0\u03b9\u03c4\u03ac\u03c7\u03c5\u03bd\u03c3\u03b7 \u03c4\u03b7\u03c2 \u03b2\u03b1\u03c1\u03cd\u03c4\u03b7\u03c4\u03b1\u03c2;&#8221;\u00a0<\/span><\/span><\/span><\/div>\n<div><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969); -webkit-text-size-adjust: auto; font-family: Helvetica;\"><span lang=\"el\"><span title=\"the mass of the object by the acceleration due to gravity?\u201d I\">\u00a0<\/span><\/span><\/span><\/div>\n<div><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969); -webkit-text-size-adjust: auto; font-family: Helvetica;\"><span lang=\"el\"><span title=\"the mass of the object by the acceleration due to gravity?\u201d I\">\u0391<\/span><span title=\"answered something like, \u201cThat's true, but if the table were\">\u03c0\u03ac\u03bd\u03c4\u03b7\u03c3\u03b1 \u03ba\u03ac\u03c4\u03b9 \u03c3\u03b1\u03bd, &#8220;\u0391\u03c5\u03c4\u03cc \u03b5\u03af\u03bd\u03b1\u03b9 \u03b1\u03bb\u03ae\u03b8\u03b5\u03b9\u03b1, \u03b1\u03bb\u03bb\u03ac \u03b1\u03bd \u03c4\u03bf \u03c4\u03c1\u03b1\u03c0\u03ad\u03b6\u03b9 \u03b4<\/span><span title=\"not there, the object would accelerate at that rate.\u201d The really\">\u03b5\u03bd \u03c5\u03c0&#8217;\u03b7\u03c1\u03c7\u03b5, \u03c4\u03bf \u03b1\u03bd\u03c4\u03b9\u03ba\u03b5\u03af\u03bc\u03b5\u03bd\u03bf \u03b8\u03b1 \u03b5\u03c0\u03b9\u03c4\u03b1\u03c7\u03c5\u03bd\u03cc\u03c4\u03b1\u03bd \u03bc&#8217; \u03b1\u03c5\u03c4\u03ae \u03c4\u03b7\u03bd \u03c4\u03b9\u03bc\u03ae&#8221;\u00a0<\/span><\/span><\/span><\/div>\n<div><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969); -webkit-text-size-adjust: auto; font-family: Helvetica;\"><span lang=\"el\"><span title=\"not there, the object would accelerate at that rate.\u201d The really\">\u00a0<\/span><\/span><\/span><\/div>\n<div><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969); -webkit-text-size-adjust: auto; font-family: Helvetica;\"><span lang=\"el\"><span title=\"not there, the object would accelerate at that rate.\u201d The really\">\u039f\u03b9 \u03c0\u03c1\u03b1\u03b3\u03bc\u03b1\u03c4\u03b9\u03ba\u03ac\u00a0<\/span><span title=\"determined students might go on to ask, \u201cYes, but what if\">\u03bc\u03b5\u03bb\u03b5\u03c4\u03b7\u03bc\u03ad\u03bd\u03bf\u03b9 \u03bc\u03b1\u03b8\u03b7\u03c4\u03ad\u03c2 \u03c3\u03c5\u03bd\u03ad\u03c7\u03b9\u03c3\u03b1\u03bd \u03bd\u03b1 \u03c1\u03c9\u03c4\u03bf\u03cd\u03bd, &#8220;\u039d\u03b1\u03b9, \u03b1\u03bb\u03bb\u03ac \u03c4\u03b9 \u03b8\u03b1 \u03b3\u03b9\u03bd\u03cc\u03c4\u03b1\u03bd \u03b1\u03bd<\/span><span title=\"the object were already sitting on the surface of the Earth?\u201d\">\u00a0\u03c4\u03bf \u03b1\u03bd\u03c4\u03b9\u03ba\u03b5\u03af\u03bc\u03b5\u03bd\u03bf \u03b2\u03c1\u03b9\u03c3\u03ba\u03cc\u03c4\u03b1\u03bd \u03b1\u03ba\u03af\u03bd\u03b7\u03c4\u03bf \u03c0\u03ac\u03bd\u03c9 \u03c3\u03c4\u03b7\u03bd \u03b5\u03c0\u03b9\u03c6\u03ac\u03bd\u03b5\u03b9\u03b1 \u03c4\u03b7\u03c2 \u0393\u03b7\u03c2; &#8220;<\/span><span title=\"About that time, I would hope the bell would ring so that this\">\u00a0<\/span><\/span><\/span><\/div>\n<div><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969); -webkit-text-size-adjust: auto; font-family: Helvetica;\"><span lang=\"el\"><span title=\"About that time, I would hope the bell would ring so that this\">\u00a0<\/span><\/span><\/span><\/div>\n<div>\n<p><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969); -webkit-text-size-adjust: auto; font-family: Helvetica;\"><span lang=\"el\"><span title=\"About that time, I would hope the bell would ring so that this\">\u03a0\u03b5\u03c1\u03af\u03c0\u03bf\u03c5 \u03b5\u03ba\u03b5\u03af\u03bd\u03b7 \u03c4\u03b7\u03bd \u03ce\u03c1\u03b1, \u03ac\u03c1\u03c7\u03b9\u03c3\u03b1 \u03bd\u03b1 \u03b5\u03bb\u03c0\u03af\u03b6\u03c9 \u03cc\u03c4\u03b9 \u03b8\u03b1 \u03c7\u03c4\u03c5\u03c0\u03ae\u03c3\u03b5\u03b9<\/span><\/span><span lang=\"el\"><span title=\"About that time, I would hope the bell would ring so that this\">\u00a0\u03c4\u03bf \u03ba\u03bf\u03c5\u03b4\u03bf\u03cd\u03bd\u03b9\u00a0<\/span><\/span><span lang=\"el\"><span title=\"About that time, I would hope the bell would ring so that this\">\u03ad\u03c4\u03c3\u03b9 \u03ce\u03c3\u03c4\u03b5\u00a0<\/span><span title=\"whole discussion could be delayed until the next day.\">\u03cc\u03bb\u03b7 \u03b1\u03c5\u03c4\u03ae \u03b7 \u03c3\u03c5\u03b6\u03ae\u03c4\u03b7\u03c3\u03b7 \u03b8\u03b1 \u03bc\u03c0\u03bf\u03c1\u03bf\u03cd\u03c3\u03b5 \u03bd\u03b1 \u03ba\u03b1\u03b8\u03c5\u03c3\u03c4\u03b5\u03c1\u03ae\u03c3\u03b5\u03b9 \u03bc\u03ad\u03c7\u03c1\u03b9 \u03c4\u03b7\u03bd \u03b5\u03c0\u03cc\u03bc\u03b5\u03bd\u03b7 \u03bc\u03ad\u03c1\u03b1.\u00a0<\/span><\/span><\/span><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969);\"><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969); -webkit-text-size-adjust: auto; font-family: Helvetica;\"><span lang=\"el\"><span title=\"whole discussion could be delayed until the next day.\">\u03a4\u03b7\u03bd\u00a0<\/span><\/span><\/span><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.296875); -webkit-text-size-adjust: auto;\"><span style=\"font-family: Helvetica;\"><span lang=\"el\"><span title=\"next day, I would explain that the newton unit is the same\">\u03b5\u03c0\u03cc\u03bc\u03b5\u03bd\u03b7 \u03b7\u03bc\u03ad\u03c1\u03b1, \u03b8\u03b1 \u03ae\u03b8\u03b5\u03bb\u03b1 \u03bd\u03b1 \u03b5\u03be\u03b7\u03b3\u03ae\u03c3\u03c9 \u03cc\u03c4\u03b9 \u03b7 \u03bc\u03bf\u03bd\u03ac\u03b4\u03b1 Newton \u03b5\u03af\u03bd\u03b1\u03b9 \u03b7 \u03af\u03b4\u03b9\u03b1<\/span><span title=\"as a kg-m\/s2, so multiplying the mass in kilograms times the\">\u00a0<\/span><\/span><\/span><\/span><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.296875); -webkit-text-size-adjust: auto;\"><span style=\"font-family: Helvetica;\"><span lang=\"el\"><span title=\"as a kg-m\/s2, so multiplying the mass in kilograms times the\">\u03bc\u03b5 \u03c4\u03bf <\/p>\n<p class=\"ql-center-displayed-equation\" style=\"line-height: 22px;\"><span class=\"ql-right-eqno\"> &nbsp; <\/span><span class=\"ql-left-eqno\"> &nbsp; <\/span><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/viewonphysics.gr\/wp-content\/ql-cache\/quicklatex.com-e12af8a7e374ddacf3526e50e277f19f_l3.png\" height=\"22\" width=\"71\" class=\"ql-img-displayed-equation quicklatex-auto-format\" alt=\"&#92;&#91;&#107;&#103;&#32;&#92;&#99;&#100;&#111;&#116;&#32;&#109;&#47;&#115;&#94;&#50;&#92;&#93;\" title=\"Rendered by QuickLaTeX.com\"\/><\/p>\n<p>.\u00a0<\/span><\/span><\/span><\/span><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969); -webkit-text-size-adjust: auto; font-family: Helvetica;\"><span title=\"as a kg-m\/s2, so multiplying the mass in kilograms times the\">\u03a0\u03bf\u03bb\u03bb\u03b1\u03c0\u03bb\u03b1\u03c3\u03b9\u03ac\u03b6\u03bf\u03bd\u03c4\u03b1\u03c2\u00a0\u03ad\u03c4\u03c3\u03b9 \u03c4\u03b1 \u03c7\u03b9\u03bb\u03b9\u03cc\u03b3\u03c1\u03b1\u03bc\u03bc\u03b1 \u03c4\u03b7\u03c2 \u03bc\u03ac\u03b6\u03b1\u03c2 \u03b5\u03c0\u03af \u03c4\u03b7\u03bd\u00a0<\/span><span title=\"acceleration due to gravity would give an answer in newtons.\">\u03b5\u03c0\u03b9\u03c4\u03ac\u03c7\u03c5\u03bd\u03c3\u03b7 \u03c4\u03b7\u03c2 \u03b2\u03b1\u03c1\u03cd\u03c4\u03b7\u03c4\u03b1\u03c2, \u03b8\u03b1 \u03c0\u03ac\u03c1\u03bf\u03c5\u03bc\u03b5 \u03c9\u03c2 \u03b1\u03c0\u03ac\u03bd\u03c4\u03b7\u03c3\u03b7 \u03c4\u03bf \u03b2\u03ac\u03c1\u03bf\u03c2 \u03c3\u03b5 Newtons. \u0395\u03bd\u03ce \u03cc\u03bc\u03c9\u03c2\u00a0<\/span><span title=\"It all made sense to me, but I am sure that the students just\">\u03cc\u03bb\u03bf \u03b1\u03c5\u03c4\u03cc \u03ad\u03c7\u03b5\u03b9 \u03bd\u03cc\u03b7\u03bc\u03b1 \u03b3\u03b9\u03b1 \u03bc\u03ad\u03bd\u03b1, \u03b5\u03af\u03bc\u03b1\u03b9 \u03c3\u03af\u03b3\u03bf\u03c5\u03c1\u03bf\u03c2 \u03cc\u03c4\u03b9 \u03bf\u03b9 \u03bc\u03b1\u03b8\u03b7\u03c4\u03ad\u03c2 \u03c3\u03c5\u03bd\u03ad\u03c7\u03b9\u03c3\u03b1\u03bd \u03bd\u03b1 \u03c0\u03b5\u03c1\u03b9\u03bc\u03ad\u03bd\u03bf\u03c5\u03bd \u03bd<\/span><span title=\"went along with me to get the right answer.\">\u03b1 \u03c0\u03ac\u03c1\u03bf\u03c5\u03bd \u03c4\u03b7 \u03c3\u03c9\u03c3\u03c4\u03ae \u03b1\u03c0\u03ac\u03bd\u03c4\u03b7\u03c3\u03b7.<\/span><\/span><\/span><\/p>\n<p><!--more--><\/p>\n<div>\n<div>\n<div>\n<div>\n<div><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969); -webkit-text-size-adjust: auto;\"><span style=\"font-family: Helvetica;\"><span lang=\"el\"><span title=\"Then it dawned on me that calculating the force on an\">\u03a4\u03cc\u03c4\u03b5 \u03c3\u03c5\u03bd\u03b5\u03b9\u03b4\u03b7\u03c4\u03bf\u03c0\u03bf\u03af\u03b7\u03c3\u03b1 \u03cc\u03c4\u03b9 \u03bf \u03c5\u03c0\u03bf\u03bb\u03bf\u03b3\u03b9\u03c3\u03bc\u03cc\u03c2 \u03c4\u03b7\u03c2 \u03b4\u03cd\u03bd\u03b1\u03bc\u03b7\u03c2 \u03c0\u03bf\u03c5 \u03b1\u03c3\u03ba\u03b5\u03af\u03c4\u03b1\u03b9 \u03c0\u03ac\u03bd\u03c9 \u03c3\u03b5 \u03ad\u03bd\u03b1\u00a0<\/span><span title=\"object in a gravitational field was much like calculating the\">\u03b1\u03bd\u03c4\u03b9\u03ba\u03b5\u03af\u03bc\u03b5\u03bd\u03bf, \u03bc\u03ad\u03c3\u03b1 \u03c3&#8217; \u03ad\u03bd\u03b1 \u03b2\u03b1\u03c1\u03c5\u03c4\u03b9\u03ba\u03cc \u03c0\u03b5\u03b4\u03af\u03bf, \u03ae\u03c4\u03b1\u03bd \u03c3\u03b1\u03bd \u03c4\u03bf\u03bd \u03c5\u03c0\u03bf\u03bb\u03bf\u03b3\u03b9\u03c3\u03bc\u03cc \u03c4\u03b7\u03c2 \u03b4\u03cd\u03bd\u03b1\u03bc\u03b7\u03c2\u00a0<\/span><span title=\"force on a charged object in an electrical field.\">\u03c3\u03b5 \u03ad\u03bd\u03b1 \u03c6\u03bf\u03c1\u03c4\u03b9\u03c3\u03bc\u03ad\u03bd\u03bf \u03b1\u03bd\u03c4\u03b9\u03ba\u03b5\u03af\u03bc\u03b5\u03bd\u03bf \u03bc\u03ad\u03c3\u03b1 \u03c3\u03b5 \u03ad\u03bd\u03b1 \u03b7\u03bb\u03b5\u03ba\u03c4\u03c1\u03b9\u03ba\u03cc \u03c0\u03b5\u03b4\u03af\u03bf.\u00a0<\/span><span title=\"Both situations\">\u039a\u03b1\u03b9 \u03bf\u03b9 \u03b4\u03cd\u03bf \u03ba\u03b1\u03c4\u03b1\u03c3\u03c4\u03ac\u03c3\u03b5\u03b9\u03c2\u00a0<\/span><span title=\"require a force field.\">\u03b1\u03c0\u03b1\u03b9\u03c4\u03bf\u03cd\u03bd \u03ad\u03bd\u03b1 \u03c0\u03b5\u03b4\u03af\u03bf \u03b4\u03c5\u03bd\u03ac\u03bc\u03b5\u03c9\u03bd.\u00a0<\/span><span title=\"A charged object experiences no force unless\">\u0388\u03bd\u03b1 \u03c6\u03bf\u03c1\u03c4\u03b9\u03c3\u03bc\u03ad\u03bd\u03bf \u03b1\u03bd\u03c4\u03b9\u03ba\u03b5\u03af\u03bc\u03b5\u03bd\u03bf \u03b4\u03b5 \u03b4\u03ad\u03c7\u03b5\u03c4\u03b1\u03b9 \u03ba\u03b1\u03bc\u03af\u03b1 \u03b4\u03cd\u03bd\u03b1\u03bc\u03b7 \u03b5\u03ba\u03c4\u03cc\u03c2 \u03b1\u03bd \u03b2\u03c1\u03b5\u03b8\u03b5\u03af \u03bc\u03ad\u03c3\u03b1\u00a0<\/span><span title=\"it is in an electric field, and an object has no weight unless\">\u03c3\u03b5 \u03ad\u03bd\u03b1 \u03b7\u03bb\u03b5\u03ba\u03c4\u03c1\u03b9\u03ba\u03cc \u03c0\u03b5\u03b4\u03af\u03bf, \u03ba\u03b1\u03b9 \u03ad\u03bd\u03b1 \u03b1\u03bd\u03c4\u03b9\u03ba\u03b5\u03af\u03bc\u03b5\u03bd\u03bf \u03b4\u03b5\u03bd \u03ad\u03c7\u03b5\u03b9 \u03b2\u03ac\u03c1\u03bf\u03c2, \u03b5\u03ba\u03c4\u03cc\u03c2 \u03b1\u03bd\u00a0<\/span><span title=\"it is in a gravitational field.\">\u03b5\u03af\u03bd\u03b1\u03b9 \u03bc\u03ad\u03c3\u03b1 \u03c3\u03b5 \u03ad\u03bd\u03b1 \u03b2\u03b1\u03c1\u03c5\u03c4\u03b9\u03ba\u03cc \u03c0\u03b5\u03b4\u03af\u03bf.\u00a0<\/span><\/span><\/span><\/span><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969); -webkit-text-size-adjust: auto;\"><span style=\"font-family: Helvetica;\"><span lang=\"el\"><span title=\"I looked at the electrical equation\">\u039a\u03bf\u03af\u03c4\u03b1\u03be\u03b1 \u03c4\u03b7\u03bd \u03b7\u03bb\u03b5\u03ba\u03c4\u03c1\u03b9\u03ba\u03ae \u03b5\u03be\u03af\u03c3\u03c9\u03c3\u03b7: <\/p>\n<p class=\"ql-center-displayed-equation\" style=\"line-height: 41px;\"><span class=\"ql-right-eqno\"> &nbsp; <\/span><span class=\"ql-left-eqno\"> &nbsp; <\/span><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/viewonphysics.gr\/wp-content\/ql-cache\/quicklatex.com-0d1c73bf174d2a82c94957e6b3fc5a45_l3.png\" height=\"41\" width=\"58\" class=\"ql-img-displayed-equation quicklatex-auto-format\" alt=\"&#92;&#91;&#32;&#69;&#61;&#32;&#92;&#102;&#114;&#97;&#99;&#123;&#70;&#95;&#101;&#125;&#123;&#113;&#125;&#32;&#92;&#93;\" title=\"Rendered by QuickLaTeX.com\"\/><\/p>\n<p><\/span><\/span><\/span><\/span><\/div>\n<div style=\"text-align: center;\"><\/div>\n<div><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969); -webkit-text-size-adjust: auto; font-family: Helvetica;\"><span title=\"; the electric field is equal to the electric force divide d\">T\u03bf \u03b7\u03bb\u03b5\u03ba\u03c4\u03c1\u03b9\u03ba\u03cc \u03c0\u03b5\u03b4\u03af\u03bf \u03b5\u03af\u03bd\u03b1\u03b9 \u03af\u03c3\u03bf \u03bc\u03b5 \u03c4\u03b7\u03bd \u03b7\u03bb\u03b5\u03ba\u03c4\u03c1\u03b9\u03ba\u03ae \u03b4\u03cd\u03bd\u03b1\u03bc\u03b7 \u03b4\u03b9\u03b1 \u03c4\u03bf\u03c5 \u03c6\u03bf\u03c1\u03c4\u03af\u03bf\u03c5<\/span><\/span><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969); -webkit-text-size-adjust: auto; font-family: Helvetica;\"><span title=\"Rearranged, this becomes Fe = Eq.\">.\u00a0<\/span><\/span><\/div>\n<div><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969); -webkit-text-size-adjust: auto; font-family: Helvetica;\"><span title=\"Rearranged, this becomes Fe = Eq.\"><br \/>\n<\/span><\/span><\/div>\n<div><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969); -webkit-text-size-adjust: auto; font-family: Helvetica;\"><span title=\"This looks\">\u0391\u03bb\u03bb\u03ac\u03b6\u03bf\u03bd\u03c4\u03b1\u03c2 \u03bb\u03af\u03b3\u03bf \u03c4\u03b7\u03bd \u03b5\u03be\u03af\u03c3\u03c9\u03c3\u03b7 \u03ad\u03c7\u03bf\u03c5\u03bc\u03b5: <\/p>\n<p class=\"ql-center-displayed-equation\" style=\"line-height: 16px;\"><span class=\"ql-right-eqno\"> &nbsp; <\/span><span class=\"ql-left-eqno\"> &nbsp; <\/span><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/viewonphysics.gr\/wp-content\/ql-cache\/quicklatex.com-1aaba48d854e81f7f29e2c034ef004a5_l3.png\" height=\"16\" width=\"71\" class=\"ql-img-displayed-equation quicklatex-auto-format\" alt=\"&#92;&#91;&#32;&#70;&#95;&#101;&#61;&#101;&#32;&#92;&#99;&#100;&#111;&#116;&#32;&#113;&#32;&#92;&#93;\" title=\"Rendered by QuickLaTeX.com\"\/><\/p>\n<p><\/span><\/span><\/div>\n<div><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969); -webkit-text-size-adjust: auto; font-family: Helvetica;\"><span title=\"This looks\">\u0391\u03c5\u03c4\u03cc \u03c6\u03b1\u03af\u03bd\u03b5\u03c4\u03b1\u03b9 \u03bd\u03b1\u00a0<\/span><\/span><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969); -webkit-text-size-adjust: auto; font-family: Helvetica;\"><span title=\"a lot like the Fg = mg equation that my students and I were\">\u03bc\u03bf\u03b9\u03ac\u03b6\u03b5\u03b9 \u03c0\u03bf\u03bb\u03cd \u03bc\u03b5 \u03c4\u03b7\u03bd \u03b5\u03be\u03af\u03c3\u03c9\u03c3\u03b7: <\/p>\n<p class=\"ql-center-displayed-equation\" style=\"line-height: 17px;\"><span class=\"ql-right-eqno\"> &nbsp; <\/span><span class=\"ql-left-eqno\"> &nbsp; <\/span><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/viewonphysics.gr\/wp-content\/ql-cache\/quicklatex.com-576466a4e38a24b3e0a51bd9f50e733c_l3.png\" height=\"17\" width=\"80\" class=\"ql-img-displayed-equation quicklatex-auto-format\" alt=\"&#92;&#91;&#32;&#70;&#95;&#103;&#61;&#109;&#32;&#92;&#99;&#100;&#111;&#116;&#32;&#103;&#32;&#92;&#93;\" title=\"Rendered by QuickLaTeX.com\"\/><\/p>\n<p> <\/span><\/span><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969); -webkit-text-size-adjust: auto; font-family: Helvetica;\"><span title=\"a lot like the Fg = mg equation that my students and I were\">\u03c4\u03b7\u03bd \u03bf\u03c0\u03bf\u03af\u03b1 \u03bf\u03b9 \u03bc\u03b1\u03b8\u03b7\u03c4\u03ad\u03c2 \u03bc\u03bf\u03c5 \u03ba\u03b1\u03b9 \u03b5\u03b3\u03ce \u03c0\u03b1\u03bb\u03b5\u03cd\u03b1\u03bc\u03b5\u00a0<\/span><\/span><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969);\"><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969); -webkit-text-size-adjust: auto; font-family: Helvetica;\"><span title=\"struggling to understand.\">\u03bd\u03b1 \u03ba\u03b1\u03c4\u03b1\u03bd\u03bf\u03ae\u03c3\u03bf\u03c5\u03bc\u03b5.<\/span><\/span><\/span><\/div>\n<div><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969);\"><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969); -webkit-text-size-adjust: auto; font-family: Helvetica;\"><span title=\"Then the big \u201caha!\u201d came.\">\u00a0<\/span><\/span><\/span><\/div>\n<div><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969);\"><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969); -webkit-text-size-adjust: auto; font-family: Helvetica;\"><span title=\"Then the big \u201caha!\u201d came.\">\u03a3\u03c4\u03b7 \u03c3\u03c5\u03bd\u03ad\u03c7\u03b5\u03b9\u03b1 \u03b7\u03c1\u03b8\u03b5 \u03ad\u03bd\u03b1 \u03bc\u03b5\u03b3\u03ac\u03bb\u03bf &#8220;\u0391\u03c7\u03ac!&#8221;. \u039a\u03b1\u03c4\u03ac \u03c4\u03b7 \u03bc\u03b5\u03c4\u03ac\u03b2\u03b1\u03c3\u03b7\u00a0<\/span><\/span><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969); -webkit-text-size-adjust: auto; font-family: Helvetica;\"><span title=\"transition from teaching about kinematics to dynamics, I need\">\u03c4\u03b7\u03c2 \u03b4\u03b9\u03b4\u03b1\u03c3\u03ba\u03b1\u03bb\u03af\u03b1\u03c2 \u03bc\u03bf\u03c5 \u03b1\u03c0\u03cc \u03c4\u03b7\u03bd \u03ba\u03b9\u03bd\u03b7\u03bc\u03b1\u03c4\u03b9\u03ba\u03ae \u03c3\u03c4\u03b7 \u03b4\u03c5\u03bd\u03b1\u03bc\u03b9\u03ba\u03ae, \u03b8\u03b1 \u03ad\u03c0\u03c1\u03b5\u03c0\u03b5\u00a0<\/span><\/span><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969); -webkit-text-size-adjust: auto; font-family: Helvetica;\"><span title=\"to discuss the gravitational force field around the Earth.\">\u03bd\u03b1 \u03c3\u03c5\u03b6\u03b7\u03c4\u03ae\u03c3\u03bf\u03c5\u03bc\u03b5 \u03c4\u03bf \u03b2\u03b1\u03c1\u03c5\u03c4\u03b9\u03ba\u03cc \u03c0\u03b5\u03b4\u03af\u03bf \u03b4\u03c5\u03bd\u03ac\u03bc\u03b5\u03c9\u03bd \u03b3\u03cd\u03c1\u03c9 \u03b1\u03c0\u03cc \u03c4\u03b7 \u0393\u03b7.\u00a0<\/span><\/span><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969); -webkit-text-size-adjust: auto; font-family: Helvetica;\"><span title=\"If I\">\u0391\u03bd\u00a0<\/span><\/span><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969); -webkit-text-size-adjust: auto; font-family: Helvetica;\"><span title=\"discuss the concept of a field early in the year using gravitational\">\u03c3\u03c5\u03b6\u03b7\u03c4\u03ae\u03c3\u03bf\u03c5\u03bc\u03b5 \u03c4\u03b7\u03bd \u03b9\u03b4\u03ad\u03b1 \u03b5\u03bd\u03cc\u03c2 \u03c0\u03b5\u03b4\u03af\u03bf\u03c5, \u03c3\u03c4\u03b9\u03c2 \u03b1\u03c1\u03c7\u03ad\u03c2 \u03c4\u03bf\u03c5 \u03ad\u03c4\u03bf\u03c5\u03c2, \u03c7\u03c1\u03b7\u03c3\u03b9\u03bc\u03bf\u03c0\u03bf\u03b9\u03ce\u03bd\u03c4\u03b1\u03c2 \u03c4\u03b7 \u03b2\u03b1\u03c1\u03c5\u03c4\u03b9\u03ba\u03ae\u00a0<\/span><\/span><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969); -webkit-text-size-adjust: auto; font-family: Helvetica;\"><span title=\"force, which is common to the students, then later when\">\u03b4\u03cd\u03bd\u03b1\u03bc\u03b7, \u03bc\u03b5 \u03c4\u03b7\u03bd \u03bf\u03c0\u03bf\u03af\u03b1 \u03bf\u03b9 \u03bc\u03b1\u03b8\u03b7\u03c4\u03ad\u03c2 \u03b5\u03af\u03bd\u03b1\u03b9 \u03b5\u03be\u03bf\u03b9\u03ba\u03b5\u03b9\u03c9\u03bc\u03ad\u03bd\u03bf\u03b9<\/span><\/span><\/span><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969);\"><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969); -webkit-text-size-adjust: auto; font-family: Helvetica;\"><span title=\"force, which is common to the students, then later when\">, \u03c4\u03cc\u03c4\u03b5 \u03b1\u03c1\u03b3\u03cc\u03c4\u03b5\u03c1\u03b1, \u03cc\u03c4\u03b1\u03bd \u03b8\u03b1\u00a0<\/span><\/span><\/span><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969);\"><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969); -webkit-text-size-adjust: auto; font-family: Helvetica;\"><span title=\"we discuss electric fields this will not be so foreign.\">\u03c3\u03c5\u03b6\u03b7\u03c4\u03ac\u03bc\u03b5 \u03b3\u03b9\u03b1 \u03c4\u03b1 \u03b7\u03bb\u03b5\u03ba\u03c4\u03c1\u03b9\u03ba\u03ac \u03c0\u03b5\u03b4\u03af\u03b1, \u03b1\u03c5\u03c4\u03cc \u03b4\u03b5\u03bd \u03b8\u03b1 \u03c4\u03bf\u03c5\u03c2 \u03b5\u03af\u03bd\u03b1\u03b9 \u03c4\u03cc\u03c3\u03bf \u03be\u03ad\u03bd\u03bf.<\/span><\/span><\/span><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969);\"><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969);\"><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969); -webkit-text-size-adjust: auto; font-family: Helvetica;\"><span title=\"In addition\">\u0395\u03c0\u03af \u03c0\u03bb\u03ad\u03bf\u03bd \u03b8\u03b1 \u03b2\u03bf\u03b7\u03b8\u03b7\u03b8\u03bf\u03cd\u03bd \u03bd\u03b1 \u03b1\u03c0\u03bf\u03ba\u03c4\u03ae\u03c3\u03bf\u03c5\u03bd \u03bc\u03b9\u03b1 \u03b5\u03b9\u03ba\u03cc\u03bd\u03b1<\/span><\/span><\/span><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969);\"><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969); -webkit-text-size-adjust: auto; font-family: Helvetica;\"><span title=\"this helps illustrate one of the big underlying ideas of physics.\">\u00a0\u03b3\u03b9\u03b1 \u03c4\u03b9\u03c2 \u03bc\u03b5\u03b3\u03ac\u03bb\u03b5\u03c2 \u03b2\u03b1\u03c3\u03b9\u03ba\u03ad\u03c2 \u03b9\u03b4\u03ad\u03b5\u03c2 \u03c4\u03b7\u03c2 \u03c6\u03c5\u03c3\u03b9\u03ba\u03ae\u03c2.<\/span><\/span><\/span><\/span><\/div>\n<div><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969);\"><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969);\"><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969); -webkit-text-size-adjust: auto; font-family: Helvetica;\"><span title=\"this helps illustrate one of the big underlying ideas of physics.\">\u00a0<\/span><\/span><\/span><\/span><\/div>\n<div><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969);\"><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969); -webkit-text-size-adjust: auto; font-family: Helvetica;\"><span title=\"That's when I created the following laboratory activity.\">\u0393\u03b9 \u03b1\u03c5\u03c4\u03cc \u03ad\u03c6\u03c4\u03b9\u03b1\u03be\u03b1 \u03c4\u03b7\u03bd \u03b1\u03ba\u03cc\u03bb\u03bf\u03c5\u03b8\u03b7 \u03b4\u03c1\u03b1\u03c3\u03c4\u03b7\u03c1\u03b9\u03cc\u03c4\u03b7\u03c4\u03b1 \u03b3\u03b9\u03b1 \u03c4\u03bf \u03b5\u03c1\u03b3\u03b1\u03c3\u03c4\u03ae\u03c1\u03b9\u03bf.\u00a0<\/span><\/span><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969); -webkit-text-size-adjust: auto; font-family: Helvetica;\"><span title=\"It is\">\u0395\u03af\u03bd\u03b1\u03b9 \u03c0\u03bf\u03bb\u03cd<\/span><\/span><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969); -webkit-text-size-adjust: auto; font-family: Helvetica;\"><span title=\"deceptively simple, but conceptually very powerful.\">\u00a0\u03b1\u03c0\u03bb\u03cc, \u03b1\u03bb\u03bb\u03ac \u03b5\u03bd\u03bd\u03bf\u03b9\u03bf\u03bb\u03bf\u03b3\u03b9\u03ba\u03ac \u03c0\u03bf\u03bb\u03cd \u03b9\u03c3\u03c7\u03c5\u03c1\u03cc.\u00a0<\/span><\/span><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969); -webkit-text-size-adjust: auto; font-family: Helvetica;\"><span title=\"The students\">\u039f\u03b9 \u03bc\u03b1\u03b8\u03b7\u03c4\u03ad\u03c2 \u03b2\u03c1\u03af\u03c3\u03ba\u03bf\u03c5\u03bd\u00a0<\/span><\/span><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969); -webkit-text-size-adjust: auto; font-family: Helvetica;\"><span title=\"find several objects around the room that have masses\">\u03b4\u03b9\u03ac\u03c6\u03bf\u03c1\u03b1 \u03b1\u03bd\u03c4\u03b9\u03ba\u03b5\u03af\u03bc\u03b5\u03bd\u03b1 \u03c0\u03bf\u03c5 \u03c5\u03c0\u03ac\u03c1\u03c7\u03bf\u03c5\u03bd \u03b3\u03cd\u03c1\u03c9 \u03c4\u03bf\u03c5\u03c2 \u03c3\u03c4\u03b7\u03bd \u03b1\u03af\u03b8\u03bf\u03c5\u03c3\u03b1 \u03bc\u03b5 \u03bc\u03ac\u03b6\u03b5\u03c2\u00a0<\/span><\/span><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969); -webkit-text-size-adjust: auto; font-family: Helvetica;\"><span title=\"ranging from 100 g (0.1 kg) to 2000 g (2.0 kg).\">\u03c0\u03bf\u03c5 \u03ba\u03c5\u03bc\u03b1\u03af\u03bd\u03bf\u03bd\u03c4\u03b1\u03b9 \u03b1\u03c0\u03cc 100 g (0,1 kg) \u03ad\u03c9\u03c2 2000gr (2,0kg).\u00a0<\/span><\/span><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969); -webkit-text-size-adjust: auto; font-family: Helvetica;\"><span title=\"They use a centigram\">\u03a7\u03c1\u03b7\u03c3\u03b9\u03bc\u03bf\u03c0\u03bf\u03b9\u03bf\u03cd\u03bd \u03ad\u03bd\u03b1 \u03b6\u03c5\u03b3\u03cc \u03b9\u03c3\u03bf\u03c1\u03c1\u03bf\u03c0\u03af\u03b1\u03c2 \u03bc\u03b5 \u03b4\u03af\u03c3\u03ba\u03bf\u03c5\u03c2<\/span><\/span><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969); -webkit-text-size-adjust: auto; font-family: Helvetica;\"><span title=\"or platform balance to find the mass of these objects.\">\u00a0\u03b3\u03b9\u03b1 \u03bd\u03b1 \u03b2\u03c1\u03bf\u03c5\u03bd \u03c4\u03b7 \u03bc\u03ac\u03b6\u03b1 \u03b1\u03c5\u03c4\u03ce\u03bd \u03c4\u03c9\u03bd \u03b1\u03bd\u03c4\u03b9\u03ba\u03b5\u03b9\u03bc\u03ad\u03bd\u03c9\u03bd.<\/span><\/span><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969); -webkit-text-size-adjust: auto; font-family: Helvetica;\"><span title=\"Then the students use a newton spring scale to determine the\">\u03a3\u03c4\u03b7 \u03c3\u03c5\u03bd\u03ad\u03c7\u03b5\u03b9\u03b1 \u03bf\u03b9 \u03bc\u03b1\u03b8\u03b7\u03c4\u03ad\u03c2 \u03c7\u03c1\u03b7\u03c3\u03b9\u03bc\u03bf\u03c0\u03bf\u03b9\u03bf\u03cd\u03bd \u03ad\u03bd\u03b1 \u03b4\u03c5\u03bd\u03b1\u03bc\u03cc\u03bc\u03b5\u03c4\u03c1\u03bf \u03b3\u03b9\u03b1 \u03bd\u03b1 \u03bc\u03b5\u03c4\u03c1\u03ae\u03c3\u03bf\u03c5\u03bd \u03c4\u03b7\u00a0<\/span><\/span><\/span><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969);\"><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969); -webkit-text-size-adjust: auto; font-family: Helvetica;\"><span title=\"gravitational pull of the Earth on the objects, aka their weight.\">\u03b2\u03b1\u03c1\u03c5\u03c4\u03b9\u03ba\u03ae \u03ad\u03bb\u03be\u03b7 \u03c4\u03b7\u03c2 \u0393\u03b7\u03c2 \u03c3\u03c4\u03b1 \u03b1\u03bd\u03c4\u03b9\u03ba\u03b5\u03af\u03bc\u03b5\u03bd\u03b1, \u03b3\u03bd\u03c9\u03c3\u03c4\u03ae \u03ba\u03b1\u03b9 \u03c9\u03c2 \u03b2\u03ac\u03c1\u03bf\u03c2 \u03c4\u03bf\u03c5\u03c2.<\/span><\/span><\/span><\/div>\n<div style=\"text-align: left;\"><\/div>\n<div style=\"text-align: left;\"><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969); -webkit-text-size-adjust: auto; font-family: Helvetica;\"><a href=\"https:\/\/viewonphysics.gr\/wp-content\/uploads\/2014\/03\/g1.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\" wp-image-915 alignleft\" src=\"https:\/\/viewonphysics.gr\/wp-content\/uploads\/2014\/03\/g1.jpg\" alt=\"g1\" width=\"328\" height=\"182\" \/><\/a>\u0395\u03af\u03bd\u03b1\u03b9 \u03c3\u03b7\u03bc\u03b1\u03bd\u03c4\u03b9\u03ba\u03cc \u03bd\u03b1 \u03c7\u03c1\u03b7\u03c3\u03b9\u03bc\u03bf\u03c0\u03bf\u03b9\u03ae\u03c3\u03bf\u03c5\u03bc\u03b5 \u03c4\u03b9\u03c2 \u03b4\u03cd\u03bf \u03b4\u03b9\u03b1\u03c6\u03bf\u03c1\u03b5\u03c4\u03b9\u03ba\u03ad\u03c2 \u03bc\u03b5\u03b8\u03cc\u03b4\u03bf\u03c5\u03c2 \u03bc\u03ad\u03c4\u03c1\u03b7\u03c3\u03b7\u03c2 \u03c0\u03c1\u03bf\u03ba\u03b5\u03b9\u03bc\u03ad\u03bd\u03bf\u03c5 \u03bd\u03b1 \u03c3\u03c5\u03b6\u03b7\u03c4\u03b7\u03b8\u03bf\u03cd\u03bd \u03c0\u03bf\u03b9\u03b1 \u03bc\u03ad\u03c4\u03c1\u03b7\u03c3\u03b7 \u03b1\u03c0\u03b1\u03b9\u03c4\u03b5\u03af \u03c4\u03bf \u03b2\u03b1\u03c1\u03c5\u03c4\u03b9\u03ba\u03cc \u03c0\u03b5\u03b4\u03af\u03bf \u03b3\u03b9\u03b1 \u03bd\u03b1 \u03bb\u03b5\u03b9\u03c4\u03bf\u03c5\u03c1\u03b3\u03ae\u03c3\u03b5\u03b9 \u03ba\u03b1\u03b9 \u03c0\u03bf\u03b9\u03b1 \u03bc\u03ad\u03c4\u03c1\u03b7\u03c3\u03b7 \u03b4\u03af\u03bd\u03b5\u03b9 \u03b4\u03b9\u03b1\u03c6\u03bf\u03c1\u03b5\u03c4\u03b9\u03ba\u03ad\u03c2 \u03c4\u03b9\u03bc\u03ad\u03c2 \u03b1\u03bd\u03ac\u03bb\u03bf\u03b3\u03b1 \u03bc\u03b5 \u03c4\u03bf \u03b2\u03b1\u03c1\u03c5\u03c4\u03b9\u03ba\u03cc \u03c0\u03b5\u03b4\u03af\u03bf \u03c4\u03bf\u03c5 \u03c4\u03bf\u03c0\u03bf\u03c5 \u03c0\u03bf\u03c5 \u03b2\u03c1\u03b9\u03c3\u03ba\u03cc\u03bc\u03b1\u03c3\u03c4\u03b5. \u039f\u03b9 \u03bc\u03b1\u03b8\u03b7\u03c4\u03ad\u03c2 \u03b1\u03c1\u03c7\u03af\u03b6\u03bf\u03c5\u03bd \u03bd\u03b1 \u03c3\u03c5\u03bd\u03b5\u03b9\u03b4\u03b7\u03c4\u03bf\u03c0\u03bf\u03b9\u03b7\u03bf\u03cd\u03bd \u03cc\u03c4\u03b9 \u03bc\u03b9\u03b1 \u03b9\u03c3\u03bf\u03c1\u03c1\u03bf\u03c0\u03af\u03b1 \u03bc\u03b5\u03c4\u03c1\u03ac \u03c4\u03b7\u03bd \u03af\u03b4\u03b9\u03b1 \u03c4\u03b9\u03bc\u03ae \u03b3\u03b9\u03b1 \u03c4\u03b7 \u03bc\u03ac\u03b6\u03b1 \u03b5\u03bd\u03cc\u03c2 \u03b1\u03bd\u03c4\u03b9\u03ba\u03b5\u03b9\u03bc\u03ad\u03bd\u03bf\u03c5 \u03b1\u03bd\u03b5\u03be\u03ac\u03c1\u03c4\u03b7\u03c4\u03b1 \u03b1\u03c0\u03cc \u03c4\u03b7\u03bd \u03c4\u03b9\u03bc\u03ae \u03c4\u03bf\u03c5 \u03b2\u03b1\u03c1\u03c5\u03c4\u03b9\u03ba\u03bf\u03cd \u03c0\u03b5\u03b4\u03af\u03bf\u03c5, \u03b5\u03c6\u03cc\u03c3\u03bf\u03bd \u03b1\u03c5\u03c4\u03cc \u03c5\u03c0\u03ac\u03c1\u03c7\u03b5\u03b9. \u0391\u03c0\u03cc \u03c4\u03b7\u03bd \u03ac\u03bb\u03bb\u03b7 \u03c0\u03bb\u03b5\u03c5\u03c1\u03ac, \u03b7 \u03ba\u03bb\u03af\u03bc\u03b1\u03ba\u03b1 \u03c4\u03bf\u03c5 \u03b4\u03c5\u03bd\u03b1\u03bc\u03cc\u03bc\u03b5\u03c4\u03c1\u03bf\u03c5 &#8211; \u03b5\u03bb\u03b1\u03c4\u03b7\u03c1\u03af\u03bf\u03c5 \u03b8\u03b1 \u03b4\u03ce\u03c3\u03b5\u03b9 \u03b4\u03b9\u03b1\u03c6\u03bf\u03c1\u03b5\u03c4\u03b9\u03ba\u03ad\u03c2 \u03c4\u03b9\u03bc\u03ad\u03c2 \u03b1\u03bd\u03ac\u03bb\u03bf\u03b3\u03b1 \u03bc\u03b5 \u03c4\u03b7 \u03b4\u03cd\u03bd\u03b1\u03bc\u03b7 \u03c4\u03bf\u03c5 \u03b2\u03b1\u03c1\u03c5\u03c4\u03b9\u03ba\u03bf\u03cd \u03c0\u03b5\u03b4\u03af\u03bf\u03c5.\u00a0<\/span><\/div>\n<\/div>\n<div><span style=\"font-family: Helvetica;\"><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969); -webkit-text-size-adjust: auto;\">\u00a0<\/span><\/span><\/div>\n<div><span style=\"font-family: Helvetica;\"><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969); -webkit-text-size-adjust: auto;\">\u03a3\u03c4\u03b7 \u03c3\u03c5\u03bd\u03ad\u03c7\u03b5\u03b9\u03b1 \u03bf\u03b9 \u03bc\u03b1\u03b8\u03b7\u03c4\u03ad\u03c2 \u03c3\u03c7\u03b5\u03b4\u03b9\u03ac\u03b6\u03bf\u03c5\u03bd \u03c4\u03bf \u03b3\u03c1\u03ac\u03c6\u03b7\u03bc\u03b1 \u03bc\u03ac\u03b6\u03b1 &#8211; \u03b2\u03ac\u03c1\u03bf\u03c2 \u03c4\u03c9\u03bd \u03b1\u03bd\u03c4\u03b9\u03ba\u03b5\u03b9\u03bc\u03ad\u03bd\u03c9\u03bd. \u0397 \u03bc\u03ac\u03b6\u03b1 \u03c3\u03c7\u03b5\u03b4\u03b9\u03ac\u03b6\u03b5\u03c4\u03b1\u03b9 \u03c3\u03c4\u03bf\u03bd \u03bf\u03c1\u03b9\u03b6\u03cc\u03bd\u03c4\u03b9\u03bf \u03ac\u03be\u03bf\u03bd\u03b1.<\/span><\/span><\/div>\n<div><\/div>\n<div style=\"text-align: left;\"><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969); -webkit-text-size-adjust: auto; font-family: Helvetica;\"><a href=\"https:\/\/viewonphysics.gr\/wp-content\/uploads\/2014\/03\/g2.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\" wp-image-916 alignleft\" src=\"https:\/\/viewonphysics.gr\/wp-content\/uploads\/2014\/03\/g2.jpg\" alt=\"g2\" width=\"369\" height=\"209\" \/><\/a>\u03a4\u03bf \u03b3\u03b5\u03b3\u03bf\u03bd\u03cc\u03c2 \u03cc\u03c4\u03b9 \u03ad\u03c7\u03bf\u03c5\u03bc\u03b5 \u03b3\u03c1\u03b1\u03bc\u03bc\u03b9\u03ba\u03ae \u03bc\u03bf\u03c1\u03c6\u03ae, \u03bf\u03b9 \u03bc\u03b1\u03b8\u03b7\u03c4\u03ad\u03c2 \u03bc\u03c0\u03bf\u03c1\u03bf\u03cd\u03bd \u03bd\u03b1 \u03c0\u03c1\u03bf\u03c7\u03c9\u03c1\u03ae\u03c3\u03bf\u03c5\u03bd \u03c3\u03c4\u03b7\u03bd \u03c0\u03b1\u03c1\u03b1\u03ba\u03ac\u03c4\u03c9 \u03b1\u03bd\u03ac\u03bb\u03c5\u03c3\u03b7.<\/span><\/div>\n<div style=\"text-align: left;\"><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969); -webkit-text-size-adjust: auto; font-family: Helvetica;\">\u00a0<\/span><\/div>\n<div style=\"text-align: left;\"><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969); -webkit-text-size-adjust: auto; font-family: Helvetica;\"><b>[\u0392\u03ae\u03bc\u03b1 1: <\/b><i>\u0393\u03c1\u03ac\u03c8\u03c4\u03b5 \u03c4\u03b7 \u03b3\u03b5\u03bd\u03b9\u03ba\u03ae \u03b5\u03be\u03af\u03c3\u03c9\u03c3\u03b7 \u03c4\u03b7\u03c2 \u03b5\u03c5\u03b8\u03b5\u03af\u03b1\u03c2<\/i>] \u00a0\u0397 \u03b5\u03be\u03af\u03c3\u03c9\u03c3\u03b7 \u03b5\u03c5\u03b8\u03b5\u03af\u03b1\u03c2 \u03b4\u03af\u03bd\u03b5\u03c4\u03b1\u03b9 \u03b1\u03c0\u03cc \u03c4\u03b7 \u03c3\u03c7\u03ad\u03c3\u03b7: <\/p>\n<p class=\"ql-center-displayed-equation\" style=\"line-height: 17px;\"><span class=\"ql-right-eqno\"> &nbsp; <\/span><span class=\"ql-left-eqno\"> &nbsp; <\/span><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/viewonphysics.gr\/wp-content\/ql-cache\/quicklatex.com-b16563da7e54a9b63bc22770c0d2a3f9_l3.png\" height=\"17\" width=\"102\" class=\"ql-img-displayed-equation quicklatex-auto-format\" alt=\"&#92;&#91;&#32;&#121;&#61;&#109;&#32;&#92;&#99;&#100;&#111;&#116;&#32;&#120;&#43;&#98;&#32;&#92;&#93;\" title=\"Rendered by QuickLaTeX.com\"\/><\/p>\n<p><\/span><\/div>\n<div style=\"text-align: center;\"><span style=\"font-family: Helvetica;\"><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969); -webkit-text-size-adjust: auto;\">\u00a0<\/span><\/span><\/div>\n<div style=\"text-align: left;\"><span style=\"font-family: Helvetica;\"><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969); -webkit-text-size-adjust: auto;\">[<b>\u0392\u03ae\u03bc\u03b1 2:<\/b> <i>\u0391\u03bd\u03c4\u03b9\u03ba\u03b1\u03c4\u03b1\u03c3\u03c4\u03ae\u03c3\u03c4\u03b5 \u03c4\u03b9\u03c2 \u03bc\u03b5\u03c4\u03b1\u03b2\u03bb\u03b7\u03c4\u03ad\u03c2] <\/i>\u00a0\u0391\u03bd\u03c4\u03b9\u03ba\u03b1\u03c4\u03b1\u03c3\u03c4\u03ae\u03c3\u03c4\u03b5 \u03c4\u03b9\u03c2 \u03bc\u03b5\u03c4\u03b1\u03b2\u03bb\u03b7\u03c4\u03ad\u03c2 \u03bc\u03b5 \u03c4\u03b1 \u03c3\u03cd\u03bc\u03b2\u03bf\u03bb\u03b1 y \u03ba\u03b1\u03b9 x \u03bc\u03b5 \u03c4\u03b9\u03c2 \u03bc\u03b5\u03c4\u03b1\u03b2\u03bb\u03b7\u03c4\u03ad\u03c2 <\/span><\/span><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.296875);\"><\/p>\n<p class=\"ql-center-displayed-equation\" style=\"line-height: 17px;\"><span class=\"ql-right-eqno\"> &nbsp; <\/span><span class=\"ql-left-eqno\"> &nbsp; <\/span><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/viewonphysics.gr\/wp-content\/ql-cache\/quicklatex.com-1442ec441b204f71ad5ca7434540f1d6_l3.png\" height=\"17\" width=\"18\" class=\"ql-img-displayed-equation quicklatex-auto-format\" alt=\"&#92;&#91;&#70;&#95;&#103;&#92;&#93;\" title=\"Rendered by QuickLaTeX.com\"\/><\/p>\n<p> <span style=\"font-family: Helvetica;\">\u03ba\u03b1\u03b9 \u039c \u03c4\u03bf\u03c5 \u03b2\u03ac\u03c1\u03bf\u03c5\u03c2 \u03ba\u03b1\u03b9 \u03c4\u03b7\u03c2 \u03bc\u03ac\u03b6\u03b1\u03c2 \u03b1\u03bd\u03c4\u03af\u03c3\u03c4\u03bf\u03b9\u03c7\u03b1 <\/p>\n<p class=\"ql-center-displayed-equation\" style=\"line-height: 18px;\"><span class=\"ql-right-eqno\"> &nbsp; <\/span><span class=\"ql-left-eqno\"> &nbsp; <\/span><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/viewonphysics.gr\/wp-content\/ql-cache\/quicklatex.com-c0dd26901fed2235ba703617c534800f_l3.png\" height=\"18\" width=\"120\" class=\"ql-img-displayed-equation quicklatex-auto-format\" alt=\"&#92;&#91;&#32;&#70;&#95;&#103;&#61;&#109;&#32;&#92;&#99;&#100;&#111;&#116;&#32;&#77;&#43;&#98;&#32;&#92;&#93;\" title=\"Rendered by QuickLaTeX.com\"\/><\/p>\n<p><\/span><\/span><\/div>\n<div style=\"text-align: left;\">\n<ul>\n<li><span style=\"font-family: Helvetica;\"><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969);\">\u0393\u03b9\u03b1\u03c4\u03af \u03c4\u03bf \u03c3\u03cd\u03bc\u03b2\u03bf\u03bb\u03bf <\/span><\/span>\n<p class=\"ql-center-displayed-equation\" style=\"line-height: 17px;\"><span class=\"ql-right-eqno\"> &nbsp; <\/span><span class=\"ql-left-eqno\"> &nbsp; <\/span><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/viewonphysics.gr\/wp-content\/ql-cache\/quicklatex.com-1442ec441b204f71ad5ca7434540f1d6_l3.png\" height=\"17\" width=\"18\" class=\"ql-img-displayed-equation quicklatex-auto-format\" alt=\"&#92;&#91;&#70;&#95;&#103;&#92;&#93;\" title=\"Rendered by QuickLaTeX.com\"\/><\/p>\n<p> <span style=\"font-family: Helvetica;\">\u03c7\u03c1\u03b7\u03c3\u03b9\u03bc\u03bf\u03c0\u03bf\u03b9\u03b5\u03af\u03c4\u03b1\u03b9 \u03c9\u03c2 \u03c3\u03cd\u03bc\u03b2\u03bf\u03bb\u03bf \u03c4\u03bf\u03c5 \u03b2\u03ac\u03c1\u03bf\u03c5\u03c2; <span style=\"text-decoration: underline;\">\u03a3\u03c4\u03b7\u03bd \u03c0\u03c1\u03bf\u03ba\u03b5\u03b9\u03bc\u03ad\u03bd\u03b7 \u03c0\u03b5\u03c1\u03af\u03c0\u03c4\u03c9\u03c3\u03b7 \u03c4\u03bf \u03b2\u03ac\u03c1\u03bf\u03c2 \u03c4\u03b1\u03c5\u03c4\u03af\u03b6\u03b5\u03c4\u03b1\u03b9 \u03bc\u03b5 \u03c4\u03b7 \u03b4\u03cd\u03bd\u03b1\u03bc\u03b7 \u03c4\u03b7\u03c2 \u03b2\u03b1\u03c1\u03cd\u03c4\u03b7\u03c4\u03b1\u03c2.<\/span><\/span><\/li>\n<\/ul>\n<\/div>\n<div>\n<div><span style=\"font-family: Helvetica;\"><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969); -webkit-text-size-adjust: auto;\">[<b>\u0392\u03ae\u03bc\u03b1 3: <\/b><i>\u0391\u03bd\u03c4\u03b9\u03ba\u03b1\u03c4\u03b1\u03c3\u03c4\u03ae\u03c3\u03c4\u03b5 \u03c4\u03b9\u03c2 \u03c3\u03c4\u03b1\u03b8\u03b5\u03c1\u03ad\u03c2<\/i>] \u03a5\u03c0\u03bf\u03bb\u03bf\u03b3\u03af\u03c3\u03c4\u03b5 \u03c4\u03b9\u03c2 \u03c3\u03c4\u03b1\u03b8\u03b5\u03c1\u03ad\u03c2 &#8220;m&#8221; \u03ba\u03b1\u03b9 &#8220;b&#8221; \u03b3\u03b9\u03b1 \u03c4\u03b1 \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03b1 \u03c3\u03b1\u03c2 \u03ba\u03b1\u03b9 \u03b1\u03bd\u03c4\u03b9\u03ba\u03b1\u03c4\u03b1\u03c3\u03c4\u03ae\u03c3\u03c4\u03b5 \u03c3\u03c4\u03b7\u03bd \u03b5\u03be\u03af\u03c3\u03c9\u03c3\u03b7 \u03bc\u03b5 \u03c4\u03b9\u03c2 \u03bc\u03bf\u03bd\u03ac\u03b4\u03b5\u03c2 \u03c4\u03bf\u03c5\u03c2.<\/span><\/span><\/div>\n<div><span style=\"font-family: Helvetica;\"><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969); -webkit-text-size-adjust: auto;\">\u00a0<\/span><\/span><\/div>\n<div style=\"text-align: center;\"><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969);\"><span style=\"font-size: medium;\">\u039a\u03bb\u03af\u03c3\u03b7=m=9,8N\/kg \u00a0\u03ba\u03b1\u03b9 b=0<\/span><\/span><\/div>\n<div style=\"text-align: left;\"><span style=\"font-family: Helvetica;\"><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969);\">\u0386\u03c1\u03b1 <\/p>\n<p class=\"ql-center-displayed-equation\" style=\"line-height: 18px;\"><span class=\"ql-right-eqno\"> &nbsp; <\/span><span class=\"ql-left-eqno\"> &nbsp; <\/span><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/viewonphysics.gr\/wp-content\/ql-cache\/quicklatex.com-c557c3fc214f497ca04eebd3e6e6f13d_l3.png\" height=\"18\" width=\"143\" class=\"ql-img-displayed-equation quicklatex-auto-format\" alt=\"&#92;&#91;&#32;&#70;&#95;&#103;&#61;&#57;&#44;&#56;&#78;&#47;&#107;&#103;&#32;&#92;&#99;&#100;&#111;&#116;&#32;&#77;&#32;&#92;&#93;\" title=\"Rendered by QuickLaTeX.com\"\/><\/p>\n<p><\/span><\/span><\/div>\n<div style=\"text-align: left;\">\n<ul>\n<li><span style=\"font-family: Helvetica;\"><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969);\">\u03a0\u03bf\u03b9\u03b1 \u03c4\u03b9\u03bc\u03ae \u03c3\u03c4\u03b7\u03bd \u03b1\u03bd\u03c9\u03c4\u03ad\u03c1\u03c9 \u03b5\u03be\u03af\u03c3\u03c9\u03c3\u03b7 \u03b5\u03ba\u03c6\u03c1\u03ac\u03b6\u03b5\u03b9 \u03c4\u03b7\u03bd \u03ad\u03bd\u03c4\u03b1\u03be\u03b7 \u03c4\u03bf\u03c5 \u03b2\u03b1\u03c1\u03c5\u03c4\u03b9\u03ba\u03bf\u03cd \u03c0\u03b5\u03b4\u03af\u03bf\u03c5 \u03c4\u03b7\u03c2 \u0393\u03b7\u03c2; \u00a0<\/span><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969);\"><span style=\"text-decoration: underline;\">9,8N\/kg<\/span><\/span><\/span><\/li>\n<\/ul>\n<div><span style=\"font-family: Helvetica;\"><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969);\">[<b>\u0392\u03ae\u03bc\u03b1 4: <\/b><i>\u0393\u03c1\u03ac\u03c8\u03c4\u03b5 \u03c4\u03b7 \u03b3\u03b5\u03bd\u03b9\u03ba\u03ae \u03b5\u03be\u03af\u03c3\u03c9\u03c3\u03b7<\/i>]\u00a0<\/span><\/span><\/div>\n<div style=\"text-align: center;\"><span style=\"font-family: Helvetica;\"><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969);\"><span style=\"text-decoration: underline;\">\u0392\u03ac\u03c1\u03bf\u03c2= (9,8N\/kg) x \u03bc\u03ac\u03b6\u03b1<\/span><\/span><\/span><\/div>\n<div style=\"text-align: left;\"><span style=\"font-family: Helvetica;\"><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969);\">\u0389 <\/p>\n<p class=\"ql-center-displayed-equation\" style=\"line-height: 18px;\"><span class=\"ql-right-eqno\"> &nbsp; <\/span><span class=\"ql-left-eqno\"> &nbsp; <\/span><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/viewonphysics.gr\/wp-content\/ql-cache\/quicklatex.com-c557c3fc214f497ca04eebd3e6e6f13d_l3.png\" height=\"18\" width=\"143\" class=\"ql-img-displayed-equation quicklatex-auto-format\" alt=\"&#92;&#91;&#32;&#70;&#95;&#103;&#61;&#57;&#44;&#56;&#78;&#47;&#107;&#103;&#32;&#92;&#99;&#100;&#111;&#116;&#32;&#77;&#32;&#92;&#93;\" title=\"Rendered by QuickLaTeX.com\"\/><\/p>\n<p><\/span><\/span><\/div>\n<div style=\"text-align: left;\"><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969);\"><span style=\"font-family: Helvetica;\">\u0397 \u03b5\u03be\u03af\u03c3\u03c9\u03c3\u03b7 \u03b1\u03c5\u03c4\u03ae \u03c3\u03c5\u03bd\u03ae\u03b8\u03c9\u03c2 \u03ad\u03c7\u03b5\u03b9 \u03c4\u03b7 \u03bc\u03bf\u03c1\u03c6\u03ae: <\/p>\n<p class=\"ql-center-displayed-equation\" style=\"line-height: 17px;\"><span class=\"ql-right-eqno\"> &nbsp; <\/span><span class=\"ql-left-eqno\"> &nbsp; <\/span><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/viewonphysics.gr\/wp-content\/ql-cache\/quicklatex.com-60f721fa40d77dc28301fd2352e53a53_l3.png\" height=\"17\" width=\"84\" class=\"ql-img-displayed-equation quicklatex-auto-format\" alt=\"&#92;&#91;&#32;&#70;&#95;&#103;&#61;&#77;&#32;&#92;&#99;&#100;&#111;&#116;&#32;&#103;&#32;&#92;&#93;\" title=\"Rendered by QuickLaTeX.com\"\/><\/p>\n<p><\/span><\/span><\/div>\n<p><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969);\"><span style=\"font-family: Helvetica;\">\u038c\u03c0\u03c9\u03c2 \u03bf\u03b9 \u03bc\u03b1\u03b8\u03b7\u03c4\u03ad\u03c2 \u03b3\u03c1\u03ac\u03c6\u03bf\u03c5\u03bd \u03c4\u03b7\u03bd \u03b5\u03be\u03af\u03c3\u03c9\u03c3\u03b7 \u03b3\u03b9\u03b1 \u03c4\u03b7\u03bd \u03b5\u03c5\u03b8\u03b5\u03af\u03b1 \u03b3\u03c1\u03b1\u03bc\u03bc\u03ae \u03c0\u03bf\u03c5 \u03c0\u03b1\u03c1\u03ac\u03b3\u03b5\u03c4\u03b1\u03b9 \u03b1\u03c0\u03cc \u03c4\u03b1 \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03b1, \u03b2\u03c1\u03af\u03c3\u03ba\u03bf\u03c5\u03bd \u03cc\u03c4\u03b9 \u03b7 \u03ba\u03bb\u03af\u03c3\u03b7 \u03c4\u03b7\u03c2 \u03b3\u03c1\u03b1\u03bc\u03bc\u03ae\u03c2 \u03b5\u03af\u03bd\u03b1\u03b9 \u03c3\u03c7\u03b5\u03b4\u03cc\u03bd 9.8 N\/kg. \u0397 \u03b5\u03be\u03af\u03c3\u03c9\u03c3\u03b7 \u03c0\u03bf\u03c5 \u03c0\u03c1\u03bf\u03ba\u03cd\u03c0\u03c4\u03b5\u03b9 \u03b1\u03c0\u03cc \u03c4\u03bf \u03b3\u03c1\u03ac\u03c6\u03b7\u03bc\u03b1 \u03b5\u03af\u03bd\u03b1\u03b9 \u03b7 <\/span><\/span><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969);\"><span style=\"font-family: Helvetica;\"><span style=\"font-family: Helvetica;\"><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969);\"><\/p>\n<p class=\"ql-center-displayed-equation\" style=\"line-height: 18px;\"><span class=\"ql-right-eqno\"> &nbsp; <\/span><span class=\"ql-left-eqno\"> &nbsp; <\/span><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/viewonphysics.gr\/wp-content\/ql-cache\/quicklatex.com-f4ebcff74ff886f320c86376e61870d3_l3.png\" height=\"18\" width=\"143\" class=\"ql-img-displayed-equation quicklatex-auto-format\" alt=\"&#92;&#91;&#70;&#95;&#103;&#61;&#57;&#44;&#56;&#78;&#47;&#107;&#103;&#32;&#92;&#99;&#100;&#111;&#116;&#32;&#77;&#92;&#93;\" title=\"Rendered by QuickLaTeX.com\"\/><\/p>\n<p>.<\/span><\/span><\/span><\/span><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969);\"><span style=\"font-family: Helvetica;\"><br \/>\n<\/span><\/span><\/p>\n<\/div>\n<div style=\"text-align: left;\"><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969);\"><span style=\"font-family: Helvetica;\">\u0391\u03c6\u03bf\u03cd \u03b5\u03be\u03b5\u03c4\u03ac\u03c3\u03bf\u03c5\u03bd \u03c4\u03b7\u03bd \u03ad\u03bd\u03bd\u03bf\u03b9\u03b1 \u03c4\u03b7\u03c2 \u03c3\u03c4\u03b1\u03b8\u03b5\u03c1\u03ae\u03c2 \u03ba\u03bb\u03af\u03c3\u03b7\u03c2, \u03bf\u03b9 \u03bc\u03b1\u03b8\u03b7\u03c4\u03ad\u03c2 \u03b1\u03bd\u03c4\u03b9\u03bb\u03b1\u03bc\u03b2\u03ac\u03bd\u03bf\u03bd\u03c4\u03b1\u03b9 \u03cc\u03c4\u03b9 \u03b7 \u03c0\u03bf\u03c3\u03cc\u03c4\u03b7\u03c4\u03b1 \u03c0\u03bf\u03c5 \u03ae\u03c4\u03b1\u03bd \u03c3\u03c4\u03b1\u03b8\u03b5\u03c1\u03ae \u03ba\u03b1\u03c4\u03ac \u03c4\u03b7 \u03b4\u03b9\u03ac\u03c1\u03ba\u03b5\u03b9\u03b1 \u03c4\u03c9\u03bd \u03bc\u03b5\u03c4\u03c1\u03ae\u03c3\u03b5\u03c9\u03bd \u03b5\u03af\u03bd\u03b1\u03b9 \u03c4\u03bf \u03b2\u03b1\u03c1\u03c5\u03c4\u03b9\u03ba\u03cc \u03c0\u03b5\u03b4\u03af\u03bf \u03c4\u03b7\u03c2 \u0393\u03b7\u03c2. \u039b\u03cc\u03b3\u03c9 \u03c4\u03bf\u03c5 \u03c0\u03b5\u03b4\u03af\u03bf\u03c5 \u03b2\u03b1\u03c1\u03cd\u03c4\u03b7\u03c4\u03ac\u03c2 \u03c4\u03b7\u03c2, \u03b7 \u0393\u03b7 \u03b1\u03c3\u03ba\u03b5\u03af \u03c3\u03b5 \u03ba\u03ac\u03b8\u03b5 \u03c7\u03b9\u03bb\u03b9\u03cc\u03b3\u03c1\u03b1\u03bc\u03bc\u03bf \u03b4\u03cd\u03bd\u03b1\u03bc\u03b7 9.8N. \u0397 \u03c4\u03b9\u03bc\u03ae \u03c4\u03b7\u03c2 \u03ba\u03bb\u03af\u03c3\u03b7\u03c2 \u03b5\u03af\u03bd\u03b1\u03b9 \u03b7 \u03ad\u03bd\u03c4\u03b1\u03c3\u03b7 \u03c4\u03bf\u03c5 \u03b2\u03b1\u03c1\u03c5\u03c4\u03b9\u03ba\u03bf\u03cd \u03c0\u03b5\u03b4\u03af\u03bf\u03c5.\u00a0<\/span><\/span><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969);\"><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969);\"><span style=\"font-family: Helvetica;\">\u0388\u03c4\u03c3\u03b9 \u03b7 \u03c4\u03b9\u03bc\u03ae \u03c4\u03c9\u03bd 9.8 N \/ kg \u03b5\u03af\u03bd\u03b1\u03b9 \u03b7 \u03ad\u03bd\u03c4\u03b1\u03c3\u03b7 \u03c4\u03bf\u03c5 \u03b2\u03b1\u03c1\u03c5\u03c4\u03b9\u03ba\u03bf\u03cd \u03c0\u03b5\u03b4\u03af\u03bf\u03c5 \u03c4\u03b7\u03c2 \u0393\u03b7\u03c2 \u03c3\u03c4\u03b7\u03bd \u03b5\u03c0\u03b9\u03c6\u03ac\u03bd\u03b5\u03b9\u03b1 \u03c4\u03b7\u03c2 \u0393\u03b7\u03c2. \u0391\u03c5\u03c4\u03cc \u03be\u03b5\u03b4\u03b9\u03b1\u03bb\u03cd\u03bd\u03b5\u03b9 \u00a0\u03c3\u03c4\u03bf\u03c5\u03c2 \u03bc\u03b1\u03b8\u03b7\u03c4\u03ad\u03c2, \u03b3\u03b9\u03b1\u03c4\u03af \u03c7\u03c1\u03b5\u03b9\u03ac\u03b6\u03b5\u03c4\u03b1\u03b9 \u03bd\u03b1 \u03c0\u03bf\u03bb\u03bb\u03b1\u03c0\u03bb\u03b1\u03c3\u03b9\u03ac\u03c3\u03bf\u03c5\u03bd \u03c4\u03b7\u03bd \u03ad\u03bd\u03c4\u03b1\u03c3\u03b7 \u03c4\u03bf\u03c5 \u03b2\u03b1\u03c1\u03c5\u03c4\u03b9\u03ba\u03bf\u03cd \u03c0\u03b5\u03b4\u03af\u03bf\u03c5 \u03c4\u03b7\u03c2 \u0393\u03b7\u03c2 \u03b5\u03c0\u03af \u03c4\u03b7 \u03bc\u03ac\u03b6\u03b1 \u03c4\u03bf\u03c5 \u03b1\u03bd\u03c4\u03b9\u03ba\u03b5\u03b9\u03bc\u03ad\u03bd\u03bf\u03c5 \u03b3\u03b9\u03b1 \u03bd\u03b1 \u03c0\u03c1\u03bf\u03c3\u03b4\u03b9\u03bf\u03c1\u03af\u03c3\u03bf\u03c5\u03bd \u03c4\u03b7 \u03b2\u03b1\u03c1\u03c5\u03c4\u03b9\u03ba\u03ae \u03b4\u03cd\u03bd\u03b1\u03bc\u03b7 \u03c4\u03b7\u03c2 \u0393\u03b7\u03c2 \u03c3\u03c4\u03bf \u03b1\u03bd\u03c4\u03b9\u03ba\u03b5\u03af\u03bc\u03b5\u03bd\u03bf.\u00a0<\/span><\/span><\/span><\/div>\n<div style=\"text-align: left;\"><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969);\"><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969);\"><span style=\"font-family: Helvetica;\">\u00a0<\/span><\/span><\/span><\/div>\n<div style=\"text-align: left;\"><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969);\"><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969);\"><span style=\"font-family: Helvetica;\">\u0397 \u03b2\u03b1\u03c1\u03c5\u03c4\u03b9\u03ba\u03ae \u03b4\u03cd\u03bd\u03b1\u03bc\u03b7 \u03b5\u03af\u03bd\u03b1\u03b9 \u03b5\u03c5\u03c1\u03ad\u03c9\u03c2 \u03b3\u03bd\u03c9\u03c3\u03c4\u03ae \u03ba\u03b1\u03b9 \u03c9\u03c2 \u03b2\u03ac\u03c1\u03bf\u03c2 \u03c4\u03bf\u03c5 \u03b1\u03bd\u03c4\u03b9\u03ba\u03b5\u03b9\u03bc\u03ad\u03bd\u03bf\u03c5. \u0391\u03bd \u03c4\u03bf \u03af\u03b4\u03b9\u03bf \u03c0\u03b5\u03af\u03c1\u03b1\u03bc\u03b1 \u03b5\u03af\u03c7\u03b5 \u03b3\u03af\u03bd\u03b5\u03b9 \u03c3\u03c4\u03bf \u03c6\u03b5\u03b3\u03b3\u03ac\u03c1\u03b9, \u03b7 \u03ba\u03bb\u03af\u03c3\u03b7 \u03b8\u03b1 \u03ae\u03c4\u03b1\u03bd \u03c0\u03b5\u03c1\u03af\u03c0\u03bf\u03c5 \u03c4\u03bf 1\/6, \u03b4\u03b9\u03cc\u03c4\u03b9 \u03c4\u03bf \u03b2\u03b1\u03c1\u03c5\u03c4\u03b9\u03ba\u03cc \u03c0\u03b5\u03b4\u03af\u03bf\u00a0<\/span><\/span><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969); font-family: Helvetica;\">\u03c4\u03b7\u03c2 \u03a3\u03b5\u03bb\u03ae\u03bd\u03b7\u03c2\u00a0<\/span><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969); font-family: Helvetica;\">\u03b5\u03af\u03bd\u03b1\u03b9 \u03b9\u03c3\u03c7\u03c5\u03c1\u03cc \u03cc\u03c3\u03bf \u03c4\u03bf 1\/6 \u03c4\u03bf\u03c5 \u03b2\u03b1\u03c1\u03c5\u03c4\u03b9\u03ba\u03bf\u03cd \u03c0\u03b5\u03b4\u03af\u03bf\u03c5 \u03c4\u03b7\u03c2 \u0393\u03b7\u03c2.<\/span><\/span><\/div>\n<div style=\"text-align: left;\"><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969); font-family: Helvetica;\">\u00a0<\/span><\/div>\n<div style=\"text-align: left;\"><span style=\"font-family: Helvetica;\"><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969);\">\u039f\u03b9 \u03bc\u03b1\u03b8\u03b7\u03c4\u03ad\u03c2 \u03b8\u03b1 \u03c4\u03b1 \u03be\u03b1\u03bd\u03b1\u03b4\u03bf\u03cd\u03bd \u03cc\u03c4\u03b1\u03bd \u03b8\u03b1 \u03bc\u03b1\u03b8\u03b1\u03af\u03bd\u03bf\u03c5\u03bd \u03b3\u03b9\u03b1 \u03c4\u03b1 \u03b7\u03bb\u03b5\u03ba\u03c4\u03c1\u03b9\u03ba\u03ac \u03c0\u03b5\u03b4\u03af\u03b1. \u03a4\u03cc\u03c3\u03bf \u03c4\u03b1 \u03b2\u03b1\u03c1\u03c5\u03c4\u03b9\u03ba\u03ac \u03cc\u03c3\u03bf \u03ba\u03b1\u03b9 \u03c4\u03b1 \u03b7\u03bb\u03b5\u03ba\u03c4\u03c1\u03b9\u03ba\u03ac \u03c0\u03b5\u03b4\u03af\u03b1 \u03b5\u03af\u03bd\u03b1\u03b9 \u03b1\u03bd\u03c4\u03b9\u03c3\u03c4\u03c1\u03cc\u03c6\u03c9\u03c2 \u03b1\u03bd\u03ac\u03bb\u03bf\u03b3\u03b1 \u03bc\u03b5 \u03c4\u03bf \u03c4\u03b5\u03c4\u03c1\u03ac\u03b3\u03c9\u03bd\u03bf \u03c4\u03b7\u03c2 \u03b1\u03c0\u03cc\u03c3\u03c4\u03b1\u03c3\u03b7\u03c2 \u03b1\u03c0\u03cc \u03c4\u03bf \u03c3\u03b7\u03bc\u03b5\u03af\u03bf \u03c0\u03c1\u03bf\u03ad\u03bb\u03b5\u03c5\u03c3\u03b7\u03c2. \u03a4\u03ce\u03c1\u03b1 \u03c0\u03bf\u03c5 \u03b4\u03b9\u03b4\u03ac\u03c3\u03ba\u03c9 \u03c4\u03bf \u03b2\u03b1\u03c1\u03c5\u03c4\u03b9\u03ba\u03cc \u03c0\u03b5\u03b4\u03af\u03bf, \u03b5\u03af\u03bd\u03b1\u03b9 \u03c0\u03bf\u03bb\u03cd \u03b5\u03c5\u03ba\u03bf\u03bb\u03cc\u03c4\u03b5\u03c1\u03bf \u03b3\u03b9\u03b1 \u03c4\u03bf\u03c5\u03c2 \u03bc\u03b1\u03b8\u03b7\u03c4\u03ad\u03c2 \u03bd\u03b1 \u03b4\u03bf\u03c5\u03bd \u03c4\u03b7\u03bd \u03b1\u03bd\u03b1\u03bb\u03bf\u03b3\u03af\u03b1 \u03bc\u03b5 \u03c4\u03b7\u03bd \u03ad\u03be\u03af\u03c3\u03c9\u03c3\u03b7: <\/p>\n<p class=\"ql-center-displayed-equation\" style=\"line-height: 16px;\"><span class=\"ql-right-eqno\"> &nbsp; <\/span><span class=\"ql-left-eqno\"> &nbsp; <\/span><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/viewonphysics.gr\/wp-content\/ql-cache\/quicklatex.com-a8c8b51d3735d5e69e47edc66fa72bd9_l3.png\" height=\"16\" width=\"77\" class=\"ql-img-displayed-equation quicklatex-auto-format\" alt=\"&#92;&#91;&#32;&#70;&#95;&#101;&#61;&#69;&#32;&#92;&#99;&#100;&#111;&#116;&#32;&#113;&#32;&#92;&#93;\" title=\"Rendered by QuickLaTeX.com\"\/><\/p>\n<p><\/span><\/span><\/div>\n<div style=\"text-align: left;\"><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969); font-family: Helvetica;\"><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969);\">\u00a0\u03c3\u03c4\u03b7\u03bd \u03bf\u03c0\u03bf\u03af\u03b1 \u03b7\u03bb\u03b5\u03ba\u03c4\u03c1\u03b9\u03ba\u03ac \u03c0\u03b5\u03b4\u03af\u03b1 \u03ad\u03c7\u03bf\u03c5\u03bd \u03bc\u03bf\u03bd\u03ac\u03b4\u03b5\u03c2 N\/C, \u03b5\u03c0\u03b5\u03b9\u03b4\u03ae \u03bf\u03b9 \u03bc\u03b1\u03b8\u03b7\u03c4\u03ad\u03c2 \u03ad\u03c7\u03bf\u03c5\u03bd \u03b5\u03c1\u03b3\u03b1\u03c3\u03c4\u03b5\u03af \u03bc\u03b5 \u03c4\u03b7\u03bd \u03b5\u03be\u03af\u03c3\u03c9\u03c3\u03b7: <\/p>\n<p class=\"ql-center-displayed-equation\" style=\"line-height: 17px;\"><span class=\"ql-right-eqno\"> &nbsp; <\/span><span class=\"ql-left-eqno\"> &nbsp; <\/span><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/viewonphysics.gr\/wp-content\/ql-cache\/quicklatex.com-ed2792a81dcd2a56ea89a2c97535d1c7_l3.png\" height=\"17\" width=\"79\" class=\"ql-img-displayed-equation quicklatex-auto-format\" alt=\"&#92;&#91;&#32;&#70;&#95;&#103;&#61;&#103;&#32;&#92;&#99;&#100;&#111;&#116;&#32;&#109;&#32;&#92;&#93;\" title=\"Rendered by QuickLaTeX.com\"\/><\/p>\n<p><\/span><\/span><\/div>\n<div style=\"text-align: left;\"><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969); font-family: Helvetica;\">\u03c3\u03c4\u03b7\u03bd \u03bf\u03c0\u03bf\u03af\u03b1 \u03c4\u03bf g \u03ad\u03c7\u03b5\u03b9 \u03bc\u03bf\u03bd\u03ac\u03b4\u03b5\u03c2 N\/kg. \u039f\u03b9 \u03bc\u03b1\u03b8\u03b7\u03c4\u03ad\u03c2 \u03b4\u03b5 \u03c1\u03c9\u03c4\u03bf\u03cd\u03bd \u03c0\u03bb\u03ad\u03bf\u03bd &#8220;\u0393\u03b9\u03b1\u03c4\u03af \u03c0\u03c1\u03ad\u03c0\u03b5\u03b9 \u03bd\u03b1 \u03c0\u03bf\u03bb\u03bb\u03b1\u03c0\u03bb\u03b1\u03c3\u03b9\u03ac\u03c3\u03bf\u03c5\u03bc\u03b5 \u03c4\u03b7 \u03bc\u03ac\u03b6\u03b1 \u03b5\u03c0\u03af g \u03b3\u03b9\u03b1 \u03bd\u03b1 \u03c5\u03c0\u03bf\u03bb\u03bf\u03b3\u03af\u03c3\u03bf\u03c5\u03bc\u03b5 \u03c4\u03bf \u03b2\u03ac\u03c1\u03bf\u03c2 \u03b5\u03bd\u03cc\u03c2 \u03b1\u03bd\u03c4\u03b9\u03ba\u03b5\u03b9\u03bc\u03ad\u03bd\u03bf\u03c5;&#8221; \u0388\u03c7\u03bf\u03c5\u03bd \u03bc\u03b9\u03b1 \u03c0\u03bf\u03bb\u03cd \u03ba\u03b1\u03bb\u03cd\u03c4\u03b5\u03c1\u03b7 \u03b1\u03af\u03c3\u03b8\u03b7\u03c3\u03b7 \u03b3\u03b9\u03b1 \u03c4\u03b7 \u03b4\u03b9\u03b1\u03c6\u03bf\u03c1\u03ac \u03bc\u03b5\u03c4\u03b1\u03be\u03cd \u03c4\u03b7\u03c2 \u03bc\u03ac\u03b6\u03b1\u03c2 \u03ba\u03b1\u03b9 \u03c4\u03bf\u03c5 \u03b2\u03ac\u03c1\u03bf\u03c5\u03c2. \u039f\u03b9 \u03bc\u03b1\u03b8\u03b7\u03c4\u03ad\u03c2 \u03b5\u03c0\u03b9\u03c0\u03bb\u03ad\u03bf\u03bd \u03b5\u03af\u03bd\u03b1\u03b9 \u03ad\u03c4\u03bf\u03b9\u03bc\u03bf\u03b9 \u03bd\u03b1 \u03c4\u03bf \u03c7\u03c1\u03b7\u03c3\u03b9\u03bc\u03bf\u03c0\u03bf\u03b9\u03ae\u03c3\u03bf\u03c5\u03bd \u03ba\u03b1\u03b9 \u03c9\u03c2 \u03bc\u03b9\u03b1 \u03b1\u03bd\u03b1\u03bb\u03bf\u03b3\u03af\u03b1 \u03b3\u03b9\u03b1 \u03c4\u03b1 \u03b7\u03bb\u03b5\u03ba\u03c4\u03c1\u03b9\u03ba\u03ac \u03c0\u03b5\u03b4\u03af\u03b1.\u00a0<\/span><\/div>\n<div style=\"text-align: left;\"><span style=\"-webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); -webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969); font-family: Helvetica;\">\u00a0<\/span><\/div>\n<div style=\"text-align: left;\"><span style=\"font-family: Helvetica;\">\u0397 \u03a6\u03c5\u03c3\u03b9\u03ba\u03ae \u03b5\u03af\u03bd\u03b1\u03b9 \u03ba\u03b1\u03bb\u03cd\u03c4\u03b5\u03c1\u03b7, \u03b7 \u03ba\u03b1\u03c4\u03b1\u03bd\u03cc\u03b7\u03c3\u03b7 \u03c4\u03c9\u03bd \u03bc\u03b1\u03b8\u03b7\u03c4\u03ce\u03bd \u03b3\u03b9\u03b1 \u03c4\u03b7\u03bd \u03ad\u03bd\u03bd\u03bf\u03b9\u03b1 \u03c4\u03bf\u03c5 \u03c0\u03b5\u03b4\u03af\u03bf\u03c5 \u03b5\u03af\u03bd\u03b1\u03b9 \u03ba\u03b1\u03bb\u03cd\u03c4\u03b5\u03c1\u03b7 \u03ba\u03b1\u03b9 \u03b5\u03b3\u03ce \u03b1\u03b9\u03c3\u03b8\u03ac\u03bd\u03bf\u03bc\u03b1\u03b9 \u03ba\u03b1\u03bb\u03cd\u03c4\u03b5\u03c1\u03b1 \u03bc\u03b5 \u03c4\u03b7 \u03b4\u03b9\u03b4\u03b1\u03c3\u03ba\u03b1\u03bb\u03af\u03b1 \u03c3\u03c7\u03b5\u03c4\u03b9\u03ba\u03ac \u03bc\u03b5 \u03c4\u03bf \u03b2\u03ac\u03c1\u03bf\u03c2.\u00a0<\/span><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<p style=\"text-align: right;\"><a href=\"http:\/\/wp.me\/a4sIra-tD\"><span style=\"font-family: Helvetica;\"><i><b>\u03a4\u03bf \u03a6\u03cd\u03bb\u03bb\u03bf \u0395\u03c1\u03b3\u03b1\u03c3\u03af\u03b1\u03c2 \u03b3\u03b9\u03b1 \u03c4\u03bf \u03b5\u03c1\u03b3\u03b1\u03c3\u03c4\u03ae\u03c1\u03b9\u03bf <\/b><\/i><\/span><\/a><\/p>\n<p>&nbsp;<\/p>\n<p>\u0393\u03b9\u03ac\u03bd\u03bd\u03b7\u03c2 \u0393\u03b1\u03ca\u03c3\u03af\u03b4\u03b7\u03c2<br \/>\n<a href=\"m&#x61;i&#108;&#x74;o&#x3a;&#x67;a&#x69;s&#105;&#x64;i&#115;&#x40;v&#x69;e&#119;&#x6f;n&#112;&#x68;y&#x73;&#x69;c&#x73;.&#103;&#x72;\">&#x67;&#97;i&#x73;&#105;d&#x69;&#x73;&#64;v&#x69;&#101;w&#x6f;&#x6e;ph&#x79;&#115;i&#x63;&#x73;.g&#x72;<\/a><br \/>\n<a href=\"https:\/\/viewonphysics.gr\/wp-content\/uploads\/2013\/03\/084d8930-f294-45d0-b352-2acd918a7bd2.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone  wp-image-247\" src=\"https:\/\/viewonphysics.gr\/wp-content\/uploads\/2013\/03\/084d8930-f294-45d0-b352-2acd918a7bd2-300x181.jpg\" alt=\"084d8930-f294-45d0-b352-2acd918a7bd2\" width=\"172\" height=\"103\" srcset=\"https:\/\/viewonphysics.gr\/wp-content\/uploads\/2013\/03\/084d8930-f294-45d0-b352-2acd918a7bd2-300x181.jpg 300w, https:\/\/viewonphysics.gr\/wp-content\/uploads\/2013\/03\/084d8930-f294-45d0-b352-2acd918a7bd2.jpg 419w\" sizes=\"auto, (max-width: 172px) 100vw, 172px\" \/><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>The Physics Teacher Magazine By Jane Bray Nelson, Santa Fe College, Gainesville, FL \u03a4\u03bf \u03a6\u03cd\u03bb\u03bb\u03bf \u0395\u03c1\u03b3\u03b1\u03c3\u03af\u03b1\u03c2 \u03b3\u03b9\u03b1 \u03c4\u03bf \u03b5\u03c1\u03b3\u03b1\u03c3\u03c4\u03ae\u03c1\u03b9\u03bf \u03a9\u03c2 \u03bd\u03ad\u03b1 \u03ba\u03b1\u03b8\u03b7\u03b3\u03ae\u03c4\u03c1\u03b9\u03b1 \u03c4\u03b7\u03c2 \u03a6\u03c5\u03c3\u03b9\u03ba\u03ae\u03c2, \u03b5\u03be\u03b7\u03b3\u03bf\u03cd\u03c3\u03b1 \u03c0\u03ce\u03c2 \u03bc\u03c0\u03bf\u03c1\u03b5\u03af \u03ba\u03b1\u03bd\u03b5\u03af\u03c2 \u03bd\u03b1 \u03b2\u03c1\u03b5\u03b9\u00a0\u03c4\u03bf \u03b2\u03ac\u03c1\u03bf\u03c2 \u03b5\u03bd\u03cc\u03c2 \u03b1\u03bd\u03c4\u03b9\u03ba\u03b5\u03b9\u03bc\u03ad\u03bd\u03bf\u03c5, \u03c0\u03bf\u03c5 \u03b2\u03c1\u03af\u03c3\u03ba\u03b5\u03c4\u03b1\u03b9 \u03b1\u03ba\u03af\u03bd\u03b7\u03c4\u03bf \u03c0\u03ac\u03bd\u03c9 \u03c3\u03b5 \u03ad\u03bd\u03b1 \u03c4\u03c1\u03b1\u03c0\u03ad\u03b6\u03b9, \u03ba\u03bf\u03bd\u03c4\u03ac \u03c3\u03c4\u03b7\u03bd\u00a0\u03b5\u03c0\u03b9\u03c6\u03ac\u03bd\u03b5\u03b9\u03b1 \u03c4\u03b7\u03c2 \u0393\u03b7\u03c2.\u00a0 \u039c\u03b5 \u03b5\u03bd\u03cc\u03c7\u03bb\u03b7\u03c3\u03b5 \u03cc\u03c4\u03b1\u03bd \u03ad\u03bd\u03b1\u03c2 \u03bc\u03b1\u03b8\u03b7\u03c4\u03ae\u03c2\u00a0\u03c1\u03ce\u03c4\u03b7\u03c3\u03b5, &#8220;\u03a4\u03bf \u03b1\u03bd\u03c4\u03b9\u03ba\u03b5\u03af\u03bc\u03b5\u03bd\u03bf 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[&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[5],"tags":[23],"class_list":["post-48","post","type-post","status-publish","format-standard","hentry","category-5","tag-23"],"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/p4sIra-M","jetpack_sharing_enabled":true,"jetpack_likes_enabled":true,"_links":{"self":[{"href":"https:\/\/viewonphysics.gr\/index.php?rest_route=\/wp\/v2\/posts\/48","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/viewonphysics.gr\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/viewonphysics.gr\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/viewonphysics.gr\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/viewonphysics.gr\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=48"}],"version-history":[{"count":12,"href":"https:\/\/viewonphysics.gr\/index.php?rest_route=\/wp\/v2\/posts\/48\/revisions"}],"predecessor-version":[{"id":2997,"href":"https:\/\/viewonphysics.gr\/index.php?rest_route=\/wp\/v2\/posts\/48\/revisions\/2997"}],"wp:attachment":[{"href":"https:\/\/viewonphysics.gr\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=48"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/viewonphysics.gr\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=48"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/viewonphysics.gr\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=48"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}