{"id":5804,"date":"2017-08-21T12:42:10","date_gmt":"2017-08-21T09:42:10","guid":{"rendered":"http:\/\/viewonphysics.gr\/?p=5804"},"modified":"2017-11-01T18:12:35","modified_gmt":"2017-11-01T16:12:35","slug":"%ce%b7-%ce%ad%ce%bd%ce%bd%ce%bf%ce%b9%ce%b1-%cf%84%ce%bf%cf%85-%ce%ad%cf%81%ce%b3%ce%bf%cf%85","status":"publish","type":"post","link":"https:\/\/viewonphysics.gr\/?p=5804","title":{"rendered":"\u0397 \u03ad\u03bd\u03bd\u03bf\u03b9\u03b1 \u03c4\u03bf\u03c5 \u03ad\u03c1\u03b3\u03bf\u03c5"},"content":{"rendered":"<p><em>\u03a3\u03c4\u03b9\u03c2 \u03b1\u03c3\u03ba\u03ae\u03c3\u03b5\u03b9\u03c2 \u03c0\u03bf\u03c5 \u03b1\u03ba\u03bf\u03bb\u03bf\u03c5\u03b8\u03bf\u03cd\u03bd \u03bd\u03b1 \u03c0\u03b1\u03af\u03c1\u03bd\u03b5\u03b9\u03c2 g=10m\/s<sup>2<\/sup>.<\/em><\/p>\n<ol>\n<li>\u00a0\u0391\u03bd\u03ac\u03c6\u03b5\u03c1\u03b5 \u03c4\u03c1\u03b5\u03b9\u03c2 \u03c0\u03b5\u03c1\u03b9\u03c0\u03c4\u03ce\u03c3\u03b5\u03b9\u03c2 \u03bc\u03b5\u03c4\u03b1\u03c6\u03bf\u03c1\u03ac\u03c2 \u03b5\u03bd\u03ad\u03c1\u03b3\u03b5\u03b9\u03b1\u03c2 \u03b1\u03c0\u03cc \u03ad\u03bd\u03b1 \u03c3\u03ce\u03bc\u03b1 \u03c3\u03b5 \u03ad\u03bd\u03b1 \u03ac\u03bb\u03bb\u03bf.<\/li>\n<li>\u0394\u03cd\u03bd\u03b1\u03bc\u03b7 F \u03b5\u03c0\u03b9\u03c4\u03b1\u03c7\u03cd\u03bd\u03b5\u03b9 \u03c3\u03ce\u03bc\u03b1 \u03bc\u03ac\u03b6\u03b1\u03c2 5kg \u03bc\u03b5 \u03b5\u03c0\u03b9\u03c4\u03ac\u03c7\u03c5\u03bd\u03c3\u03b7 4m\/s<sup>2<\/sup> \u03ba\u03b1\u03b9 \u03c4\u03bf \u03bc\u03b5\u03c4\u03b1\u03c6\u03ad\u03c1\u03b5\u03b9 \u03c3\u03b5 \u03b1\u03c0\u03cc\u03c3\u03c4\u03b1\u03c3\u03b7 20m. \u03a5\u03c0\u03bf\u03bb\u03cc\u03b3\u03b9\u03c3\u03b5:\n<ol>\n<li>\u03a4\u03bf \u03ad\u03c1\u03b3\u03bf \u03c4\u03b7\u03c2 F.<\/li>\n<li>\u03a4\u03b7\u03bd \u03b5\u03bd\u03ad\u03c1\u03b3\u03b5\u03b9\u03b1 \u03c0\u03bf\u03c5 \u03bc\u03b5\u03c4\u03b1\u03b2\u03b9\u03b2\u03ac\u03b6\u03b5\u03c4\u03b1\u03b9 \u03c3\u03c4\u03bf \u03c3\u03ce\u03bc\u03b1 \u03ba\u03b1\u03c4\u03ac \u03c4\u03b7 \u03bc\u03b5\u03c4\u03b1\u03ba\u03af\u03bd\u03b7\u03c3\u03b7.<\/li>\n<\/ol>\n<\/li>\n<li>\u03a4\u03c1\u03bf\u03c6\u03bf\u03b4\u03bf\u03c4\u03bf\u03cd\u03bc\u03b5 \u03ad\u03bd\u03b1 \u03c3\u03ce\u03bc\u03b1 \u03bc\u03ac\u03b6\u03b1\u03c2 1kg \u03bc\u03b5 \u03b5\u03bd\u03ad\u03c1\u03b3\u03b5\u03b9\u03b1 200J \u03bc\u03ad\u03c3\u03c9 \u03c4\u03bf\u03c5 \u03ad\u03c1\u03b3\u03bf\u03c5 \u03b4\u03cd\u03bd\u03b1\u03bc\u03b7\u03c2 50\u039d.\n<ol>\n<li>\u03a0\u03cc\u03c3\u03bf \u03b4\u03b9\u03ac\u03c3\u03c4\u03b7\u03bc\u03b1 \u03b8\u03b1 \u03bc\u03b5\u03c4\u03b1\u03ba\u03b9\u03bd\u03b7\u03b8\u03b5\u03af \u03c4\u03bf \u03c3\u03ce\u03bc\u03b1;<\/li>\n<li>\u03a0\u03cc\u03c3\u03b7 \u03c4\u03b1\u03c7\u03cd\u03c4\u03b7\u03c4\u03b1 \u03b8\u03b1 \u03b1\u03c0\u03bf\u03ba\u03c4\u03ae\u03c3\u03b5\u03b9 \u03c4\u03bf \u03c3\u03ce\u03bc\u03b1;<\/li>\n<\/ol>\n<\/li>\n<li>\u039c\u03af\u03b1 \u03bf\u03c1\u03b9\u03b6\u03cc\u03bd\u03c4\u03b9\u03b1 \u03b4\u03cd\u03bd\u03b1\u03bc\u03b7 80\u039d \u03ba\u03b9\u03bd\u03b5\u03af \u03ad\u03bd\u03b1 \u03c3\u03ce\u03bc\u03b1 \u03c0\u03ac\u03bd\u03c9 \u03c3\u03b5 \u03bf\u03c1\u03b9\u03b6\u03cc\u03bd\u03c4\u03b9\u03bf \u03b5\u03c0\u03af\u03c0\u03b5\u03b4\u03bf \u03bc\u03b5 \u03c3\u03c4\u03b1\u03b8\u03b5\u03c1\u03ae \u03c4\u03b1\u03c7\u03cd\u03c4\u03b7\u03c4\u03b1. \u0393\u03b9\u03b1 \u03bc\u03b5\u03c4\u03b1\u03c4\u03cc\u03c0\u03b9\u03c3\u03b7 \u03c4\u03bf\u03c5 \u03c3\u03ce\u03bc\u03b1\u03c4\u03bf\u03c2 \u03ba\u03b1\u03c4\u03ac 5m:\n<ol>\n<li>\u03a0\u03cc\u03c3\u03b7 \u03b5\u03af\u03bd\u03b1\u03b9 \u03b7 \u03b5\u03bd\u03ad\u03c1\u03b3\u03b5\u03b9\u03b1 \u03c0\u03bf\u03c5 \u03bc\u03b5\u03c4\u03b1\u03b2\u03b9\u03b2\u03ac\u03b6\u03b5\u03c4\u03b1\u03b9 \u03c3\u03c4\u03bf \u03c3\u03ce\u03bc\u03b1 \u03b1\u03c0\u03cc \u03c4\u03b7 \u03b4\u03cd\u03bd\u03b1\u03bc\u03b7 \u03c4\u03c9\u03bd 80\u039d \u03ba\u03b1\u03b9 \u03c0\u03bf\u03cd \u03be\u03bf\u03b4\u03b5\u03cd\u03b5\u03c4\u03b1\u03b9 \u03b1\u03c5\u03c4\u03ae;<\/li>\n<li>\u03a0\u03cc\u03c3\u03bf \u03b5\u03af\u03bd\u03b1\u03b9 \u03c4\u03bf \u03ad\u03c1\u03b3\u03bf \u03c4\u03b7\u03c2 \u03c4\u03c1\u03b9\u03b2\u03ae\u03c2 \u03bf\u03bb\u03af\u03c3\u03b8\u03b7\u03c3\u03b7\u03c2;<\/li>\n<\/ol>\n<\/li>\n<li>\u0388\u03bd\u03b1 \u03c3\u03ce\u03bc\u03b1 \u03ba\u03b9\u03bd\u03b5\u03af\u03c4\u03b1\u03b9 \u03b5\u03c5\u03b8\u03cd\u03b3\u03c1\u03b1\u03bc\u03bc\u03b1 \u03bc\u03b5 \u03b5\u03bd\u03ad\u03c1\u03b3\u03b5\u03b9\u03b1 500J. \u0393\u03b9\u03b1 \u03ad\u03bd\u03b1 \u03b4\u03b9\u03ac\u03c3\u03c4\u03b7\u03bc\u03b1 3m \u03b1\u03c3\u03ba\u03bf\u03cd\u03bc\u03b5 \u03c3&#8217; \u03b1\u03c5\u03c4\u03cc \u03b4\u03cd\u03bd\u03b1\u03bc\u03b7 100\u039d \u03bc\u03b5 \u03c4\u03b7\u03bd \u03af\u03b4\u03b9\u03b1 \u03ba\u03b1\u03c4\u03b5\u03cd\u03b8\u03c5\u03bd\u03c3\u03b7 \u03c4\u03b7\u03c2 \u03ba\u03af\u03bd\u03b7\u03c3\u03b7\u03c2. \u03a0\u03cc\u03c3\u03b7 \u03b8\u03b1 \u03b3\u03af\u03bd\u03b5\u03b9 \u03b7 \u03b5\u03bd\u03ad\u03c1\u03b3\u03b5\u03b9\u03b1 \u03c4\u03bf\u03c5 \u03c3\u03ce\u03bc\u03b1\u03c4\u03bf\u03c2; \u0391\u03bd \u03b7 \u03b4\u03cd\u03bd\u03b1\u03bc\u03b7 \u03b1\u03c3\u03ba\u03b7\u03b8\u03b5\u03af \u03bc\u03b5 \u03b1\u03bd\u03c4\u03af\u03b8\u03b5\u03c4\u03b7 \u03c0\u03c1\u03bf\u03c2 \u03c4\u03b7\u03bd \u03ba\u03af\u03bd\u03b7\u03c3\u03b7 \u03ba\u03b1\u03c4\u03b5\u03cd\u03b8\u03c5\u03bd\u03c3\u03b7 \u03c0\u03ac\u03bb\u03b9 \u03ba\u03b1\u03c4\u03ac 3m, \u03c0\u03cc\u03c3\u03b7 \u03b8\u03b1 \u03b3\u03af\u03bd\u03b5\u03b9 \u03c4\u03cc\u03c4\u03b5 \u03b7 \u03b5\u03bd\u03ad\u03c1\u03b3\u03b5\u03b9\u03b1 \u03c4\u03bf\u03c5 \u03c3\u03ce\u03bc\u03b1\u03c4\u03bf\u03c2;<\/li>\n<li>\u03a3\u03ce\u03bc\u03b1 \u03b2\u03c1\u03af\u03c3\u03ba\u03b5\u03c4\u03b1\u03b9 \u03b1\u03ba\u03af\u03bd\u03b7\u03c4\u03bf \u03c0\u03ac\u03bd\u03c9 \u03c3\u03b5 \u03bb\u03b5\u03af\u03b1 \u03bf\u03c1\u03b9\u03b6\u03cc\u03bd\u03c4\u03b9\u03b1 \u03b5\u03c0\u03b9\u03c6\u03ac\u03bd\u03b5\u03b9\u03b1. \u03a3\u03c4\u03bf \u03c3\u03ce\u03bc\u03b1 \u03b1\u03c3\u03ba\u03b5\u03af\u03c4\u03b1\u03b9 \u03bc\u03af\u03b1 \u03b4\u03cd\u03bd\u03b1\u03bc\u03b7 30\u039d, \u03b7 \u03bf\u03c0\u03bf\u03af\u03b1 \u03c4\u03bf \u03bc\u03b5\u03c4\u03b1\u03ba\u03b9\u03bd\u03b5\u03af \u03ba\u03b1\u03c4\u03ac 2m. \u0391\u03bd \u03b7 \u03b5\u03bd\u03ad\u03c1\u03b3\u03b5\u03b9\u03b1 \u03c0\u03bf\u03c5 \u03c0\u03c1\u03bf\u03c3\u03c6\u03ad\u03c1\u03b8\u03b7\u03ba\u03b5 \u03bc\u03ad\u03c3\u03c9 \u03c4\u03b7\u03c2 \u03b4\u03cd\u03bd\u03b1\u03bc\u03b7\u03c2 \u03b5\u03af\u03bd\u03b1\u03b9 48J \u03b5\u03be\u03ad\u03c4\u03b1\u03c3\u03b5 \u03b1\u03bd \u03b7 \u03ba\u03b1\u03c4\u03b5\u03cd\u03b8\u03c5\u03bd\u03c3\u03b7 \u03c4\u03b7\u03c2 \u03b4\u03cd\u03bd\u03b1\u03bc\u03b7\u03c2 \u03b5\u03af\u03bd\u03b1\u03b9 \u03bf\u03c1\u03b9\u03b6\u03cc\u03bd\u03c4\u03b9\u03b1.<\/li>\n<li>\u03a0\u03cc\u03c3\u03bf \u03ad\u03c1\u03b3\u03bf \u03c7\u03c1\u03b5\u03b9\u03ac\u03b6\u03b5\u03c4\u03b1\u03b9 \u03b3\u03b9\u03b1 \u03bd\u03b1 \u03b1\u03bd\u03b5\u03b2\u03b5\u03af \u03ad\u03bd\u03b1 \u03b1\u03c3\u03b1\u03bd\u03c3\u03ad\u03c1 \u03bc\u03ac\u03b6\u03b1\u03c2 800kg \u03c3\u03b5 \u03cd\u03c8\u03bf\u03c2 12m; \u0391\u03bd \u03c3\u03c4\u03bf \u03b1\u03c3\u03b1\u03bd\u03c3\u03ad\u03c1 \u03b1\u03c5\u03c4\u03cc \u03c0\u03c1\u03bf\u03c3\u03c6\u03ad\u03c1\u03bf\u03c5\u03bc\u03b5 \u03ad\u03c1\u03b3\u03bf 120.000J, \u03c0\u03cc\u03c3\u03bf \u03c8\u03b7\u03bb\u03ac \u03bc\u03c0\u03bf\u03c1\u03b5\u03af \u03bd\u03b1 \u03b1\u03bd\u03b5\u03b2\u03b5\u03af;<\/li>\n<li>\u039c\u03b5 \u03c4\u03b7 \u03b2\u03bf\u03ae\u03b8\u03b5\u03b9\u03b1 \u03ba\u03b1\u03c4\u03b1\u03ba\u03cc\u03c1\u03c5\u03c6\u03bf\u03c5 \u03bd\u03ae\u03bc\u03b1\u03c4\u03bf\u03c2 \u03c4\u03c1\u03b1\u03b2\u03ac\u03bc\u03b5 \u03c0\u03c1\u03bf\u03c2 \u03c4\u03b1 \u03c0\u03ac\u03bd\u03c9 \u03bc\u03af\u03b1 \u03c3\u03c6\u03b1\u03af\u03c1\u03b1 \u03bc\u03ac\u03b6\u03b1\u03c2 3kg \u03b3\u03b9\u03b1 \u03b4\u03b9\u03ac\u03c3\u03c4\u03b7\u03bc\u03b1 4m. \u0391\u03bd \u03b7 \u03c3\u03c6\u03b1\u03af\u03c1\u03b1 \u03b1\u03c5\u03be\u03ac\u03bd\u03b5\u03b9 \u03c4\u03b7\u03bd \u03c4\u03b1\u03c7\u03cd\u03c4\u03b7\u03c4\u03ac \u03c4\u03b7\u03c2 \u03bc\u03b5 \u03c1\u03c5\u03b8\u03bc\u03cc 2m\/s \u03ba\u03ac\u03b8\u03b5 \u03b4\u03b5\u03c5\u03c4\u03b5\u03c1\u03cc\u03bb\u03b5\u03c0\u03c4\u03bf, \u03c5\u03c0\u03bf\u03bb\u03cc\u03b3\u03b9\u03c3\u03b5:\n<ol>\n<li>T\u03bf \u03ad\u03c1\u03b3\u03bf \u03c4\u03b7\u03c2 \u03c4\u03ac\u03c3\u03b7\u03c2 \u03c4\u03bf\u03c5 \u03bd\u03ae\u03bc\u03b1\u03c4\u03bf\u03c2.<\/li>\n<li>\u03a4\u03bf \u03ad\u03c1\u03b3\u03bf \u03c4\u03bf\u03c5 \u03b2\u03ac\u03c1\u03bf\u03c5\u03c2 \u03c4\u03bf\u03c5 \u03c3\u03ce\u03bc\u03b1\u03c4\u03bf\u03c2.<\/li>\n<li>\u03a4\u03b7\u03bd \u03b5\u03bd\u03ad\u03c1\u03b3\u03b5\u03b9\u03b1 \u03c0\u03bf\u03c5 \u03bc\u03b5\u03c4\u03b1\u03b2\u03b9\u03b2\u03ac\u03b6\u03b5\u03c4\u03b1\u03b9 \u03b1\u03c0\u03cc \u03c4\u03b7 \u03b4\u03cd\u03bd\u03b1\u03bc\u03b7 \u03c3\u03c4\u03b7 \u03c3\u03c6\u03b1\u03af\u03c1\u03b1.<\/li>\n<li>\u03a0\u03cc\u03c3\u03b7 \u03b1\u03c0\u03cc \u03c4\u03b7\u03bd \u03b5\u03bd\u03ad\u03c1\u03b3\u03b5\u03b9\u03b1 \u03c4\u03bf\u03c5 \u03b5\u03c1\u03c9\u03c4\u03ae\u03bc\u03b1\u03c4\u03bf\u03c2 3 \u03ba\u03b1\u03c4\u03b1\u03bd\u03b1\u03bb\u03ce\u03bd\u03b5\u03c4\u03b1\u03b9 \u03b1\u03c0\u03cc \u03c4\u03b7 \u03c3\u03c6\u03b1\u03af\u03c1\u03b1;<\/li>\n<\/ol>\n<div id=\"attachment_5820\" style=\"width: 184px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-5820\" class=\"size-medium wp-image-5820\" src=\"https:\/\/viewonphysics.gr\/wp-content\/uploads\/2017\/08\/image-1-174x300.jpeg\" alt=\"\" width=\"174\" height=\"300\" srcset=\"https:\/\/viewonphysics.gr\/wp-content\/uploads\/2017\/08\/image-1-174x300.jpeg 174w, https:\/\/viewonphysics.gr\/wp-content\/uploads\/2017\/08\/image-1.jpeg 573w\" sizes=\"auto, (max-width: 174px) 100vw, 174px\" \/><p id=\"caption-attachment-5820\" class=\"wp-caption-text\">\u0386\u03c3\u03ba\u03b7\u03c3\u03b7 8<\/p><\/div>\n<p><!--more--><\/li>\n<li>\u0392\u03c1\u03b5\u03c2 \u03c4\u03bf \u03ad\u03c1\u03b3\u03bf \u03c0\u03bf\u03c5 \u03b5\u03ba\u03c4\u03b5\u03bb\u03b5\u03af\u03c4\u03b1\u03b9 \u03b1\u03c0\u03cc \u03c4\u03b7 \u03b4\u03cd\u03bd\u03b1\u03bc\u03b7 \u03c0\u03bf\u03c5 \u03b1\u03c3\u03ba\u03b5\u03af\u03c4\u03b1\u03b9 \u03c3\u03b5 \u03ba\u03ac\u03b8\u03b5 \u03c3\u03ce\u03bc\u03b1 \u03c4\u03b7\u03c2 \u03b5\u03b9\u03ba\u03cc\u03bd\u03b1\u03c2.\n<p><div id=\"attachment_5855\" style=\"width: 400px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-5855\" class=\" wp-image-5855\" src=\"https:\/\/viewonphysics.gr\/wp-content\/uploads\/2017\/09\/image-5-300x146.jpeg\" alt=\"\" width=\"390\" height=\"190\" srcset=\"https:\/\/viewonphysics.gr\/wp-content\/uploads\/2017\/09\/image-5-300x146.jpeg 300w, https:\/\/viewonphysics.gr\/wp-content\/uploads\/2017\/09\/image-5-768x374.jpeg 768w, https:\/\/viewonphysics.gr\/wp-content\/uploads\/2017\/09\/image-5-1024x498.jpeg 1024w, https:\/\/viewonphysics.gr\/wp-content\/uploads\/2017\/09\/image-5.jpeg 1408w\" sizes=\"auto, (max-width: 390px) 100vw, 390px\" \/><p id=\"caption-attachment-5855\" class=\"wp-caption-text\">\u0386\u03c3\u03ba\u03b7\u03c3\u03b7 9<\/p><\/div><\/li>\n<li>\u0388\u03bd\u03b1 \u03c3\u03ce\u03bc\u03b1 \u03bc\u03ac\u03b6\u03b1\u03c2 20kg \u03b5\u03af\u03bd\u03b1\u03b9 \u03b1\u03ba\u03af\u03bd\u03b7\u03c4\u03bf \u03c0\u03ac\u03bd\u03c9 \u03c3\u03b5 \u03bb\u03b5\u03af\u03bf \u03bf\u03c1\u03b9\u03b6\u03cc\u03bd\u03c4\u03b9\u03bf \u03b5\u03c0\u03af\u03c0\u03b5\u03b4\u03bf. \u039a\u03ac\u03c0\u03bf\u03b9\u03b1 \u03c3\u03c4\u03b9\u03b3\u03bc\u03ae \u03b1\u03c3\u03ba\u03b5\u03af\u03c4\u03b1\u03b9 \u03c3\u03c4\u03bf \u03c3\u03ce\u03bc\u03b1 \u03bc\u03af\u03b1 \u03bf\u03c1\u03b9\u03b6\u03cc\u03bd\u03c4\u03b9\u03b1 \u03b4\u03cd\u03bd\u03b1\u03bc\u03b7, \u03bf\u03c0\u03cc\u03c4\u03b5, \u03b1\u03c6\u03bf\u03cd \u03b4\u03b9\u03b1\u03bd\u03cd\u03c3\u03b5\u03b9 40m, \u03b1\u03c0\u03bf\u03ba\u03c4\u03ac \u03c4\u03b1\u03c7\u03cd\u03c4\u03b7\u03c4\u03b1 20m\/s. \u03a0\u03cc\u03c3\u03b7 \u03b5\u03bd\u03ad\u03c1\u03b3\u03b5\u03b9\u03b1 \u03bc\u03b5\u03c4\u03b1\u03c6\u03ad\u03c1\u03b8\u03b7\u03ba\u03b5 \u03b1\u03c0\u03cc \u03c4\u03b7 \u03b4\u03cd\u03bd\u03b1\u03bc\u03b7 \u03c3\u03c4\u03bf \u03c3\u03ce\u03bc\u03b1 \u03c3\u03c4\u03bf \u03b4\u03b9\u03ac\u03c3\u03c4\u03b7\u03bc\u03b1 \u03c4\u03c9\u03bd 40m;<\/li>\n<li>\u03a3\u03c4\u03bf \u03c3\u03ce\u03bc\u03b1 \u03c4\u03b7\u03c2 \u03b5\u03b9\u03ba\u03cc\u03bd\u03b1\u03c2 \u03ad\u03c7\u03bf\u03c5\u03bc\u03b5 F<sub>1<\/sub>=50N, F<sub>2<\/sub>=20N, w=100N, \u03b8=30<sup>0<\/sup> \u03ba\u03b1\u03b9 \u03c3\u03c5\u03bd\u03c4\u03b5\u03bb\u03b5\u03c3\u03c4\u03ae \u03c4\u03c1\u03b9\u03b2\u03ae\u03c2 \u03bf\u03bb\u03af\u03c3\u03b8\u03b7\u03c3\u03b7 \u03bc=0,25. \u03a4\u03bf \u03c3\u03ce\u03bc\u03b1 \u03bc\u03b5\u03c4\u03b1\u03c4\u03bf\u03c0\u03af\u03b6\u03b5\u03c4\u03b1\u03b9 \u03ba\u03b1\u03c4\u03ac x=15m \u03ba\u03b1\u03c4\u03ac \u03c4\u03b7\u03bd \u03bf\u03c1\u03b9\u03b6\u03cc\u03bd\u03c4\u03b9\u03b1 \u03b4\u03b9\u03b5\u03cd\u03b8\u03c5\u03bd\u03c3\u03b7. \u03a5\u03c0\u03bf\u03bb\u03cc\u03b3\u03b9\u03c3\u03b5:\n<ol>\n<li>\u03a4\u03b7 \u03b4\u03cd\u03bd\u03b1\u03bc\u03b7 N \u03c4\u03bf\u03c5 \u03b4\u03b1\u03c0\u03ad\u03b4\u03bf\u03c5 \u03b5\u03c0\u03af \u03c4\u03bf\u03c5 \u03c3\u03ce\u03bc\u03b1\u03c4\u03bf\u03c2 \u03ba\u03b1\u03b9 \u03c4\u03b7\u03bd \u03c4\u03c1\u03b9\u03b2\u03ae \u03bf\u03bb\u03af\u03c3\u03b8\u03b7\u03c3\u03b7\u03c2 \u03a4.<\/li>\n<li>\u03a4\u03bf \u03ad\u03c1\u03b3\u03bf \u03c4\u03b7\u03c2 \u03ba\u03ac\u03b8\u03b5 \u03b4\u03cd\u03bd\u03b1\u03bc\u03b7\u03c2.<\/li>\n<li>\u03a4\u03bf \u03c3\u03c5\u03bd\u03bf\u03bb\u03b9\u03ba\u03cc \u03ad\u03c1\u03b3\u03bf \u03cc\u03bb\u03c9\u03bd \u03c4\u03c9\u03bd \u03b4\u03c5\u03bd\u03ac\u03bc\u03b5\u03c9\u03bd.<\/li>\n<li>\u03a4\u03b7 \u03c3\u03c5\u03bd\u03bf\u03bb\u03b9\u03ba\u03ae \u03b4\u03cd\u03bd\u03b1\u03bc\u03b7 \u03a3F<sub>x<\/sub> \u03ba\u03b1\u03c4\u03ac \u03c4\u03bf\u03bd \u03ac\u03be\u03bf\u03bd\u03b1 x \u03ba\u03b1\u03b9 \u03c4\u03b7 \u03a3F<sub>y<\/sub> \u03ba\u03b1\u03c4\u03ac \u03c4\u03bf\u03bd \u03ac\u03be\u03bf\u03bd\u03b1 y.<\/li>\n<li>\u03a4\u03bf \u03ad\u03c1\u03b3\u03bf \u03c4\u03b7\u03c2 \u03c3\u03c5\u03bd\u03b9\u03c3\u03c4\u03b1\u03bc\u03ad\u03bd\u03b7\u03c2 \u03b4\u03cd\u03bd\u03b1\u03bc\u03b7\u03c2.<\/li>\n<\/ol>\n<p><div id=\"attachment_5808\" style=\"width: 351px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-5808\" class=\" wp-image-5808\" src=\"https:\/\/viewonphysics.gr\/wp-content\/uploads\/2017\/08\/image-300x212.jpeg\" alt=\"\" width=\"341\" height=\"241\" srcset=\"https:\/\/viewonphysics.gr\/wp-content\/uploads\/2017\/08\/image-300x212.jpeg 300w, https:\/\/viewonphysics.gr\/wp-content\/uploads\/2017\/08\/image-768x543.jpeg 768w, https:\/\/viewonphysics.gr\/wp-content\/uploads\/2017\/08\/image-1024x724.jpeg 1024w, https:\/\/viewonphysics.gr\/wp-content\/uploads\/2017\/08\/image.jpeg 1090w\" sizes=\"auto, (max-width: 341px) 100vw, 341px\" \/><p id=\"caption-attachment-5808\" class=\"wp-caption-text\">\u0386\u03c3\u03ba\u03b7\u03c3\u03b7 11<\/p><\/div><\/li>\n<li>\u0397 \u03b4\u03cd\u03bd\u03b1\u03bc\u03b7 F \u03b1\u03c3\u03ba\u03b5\u03af\u03c4\u03b1\u03b9 \u03c3\u03c4\u03bf \u03c3\u03ce\u03bc\u03b1 \u03bc\u03ac\u03b6\u03b1\u03c2 12kg \u03c5\u03c0\u03cc \u03b3\u03c9\u03bd\u03af\u03b1 45<sup>0<\/sup> \u03bc\u03b5 \u03ba\u03b1\u03c4\u03b5\u03cd\u03b8\u03c5\u03bd\u03c3\u03b7 \u03c0\u03c1\u03bf\u03c2 \u03c4\u03b1 \u03ba\u03ac\u03c4\u03c9. \u03a4\u03bf \u03c3\u03ce\u03bc\u03b1 \u03ba\u03b9\u03bd\u03b5\u03af\u03c4\u03b1\u03b9 \u03bc\u03b5 \u03c3\u03c4\u03b1\u03b8\u03b5\u03c1\u03ae \u03c4\u03b1\u03c7\u03cd\u03c4\u03b7\u03c4\u03b1 \u03b3\u03b9\u03b1 \u03b4\u03b9\u03ac\u03c3\u03c4\u03b7\u03bc\u03b1 5m \u03ba\u03b1\u03b9 \u03bf \u03c3\u03c5\u03bd\u03c4\u03b5\u03bb\u03b5\u03c3\u03c4\u03ae\u03c2 \u03c4\u03c1\u03b9\u03b2\u03ae\u03c2 \u03bf\u03bb\u03af\u03c3\u03b8\u03b7\u03c3\u03b7\u03c2 \u03b5\u03af\u03bd\u03b1\u03b9 \u03bc=0,3. \u03a0\u03cc\u03c3\u03bf \u03b5\u03af\u03bd\u03b1\u03b9 \u03c4\u03bf \u03ad\u03c1\u03b3\u03bf \u03c4\u03b7\u03c2 \u03b4\u03cd\u03bd\u03b1\u03bc\u03b7\u03c2 F;\n<p><div id=\"attachment_5823\" style=\"width: 346px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-5823\" class=\" wp-image-5823\" src=\"https:\/\/viewonphysics.gr\/wp-content\/uploads\/2017\/09\/image-300x152.jpeg\" alt=\"\" width=\"336\" height=\"170\" srcset=\"https:\/\/viewonphysics.gr\/wp-content\/uploads\/2017\/09\/image-300x152.jpeg 300w, https:\/\/viewonphysics.gr\/wp-content\/uploads\/2017\/09\/image-768x389.jpeg 768w, https:\/\/viewonphysics.gr\/wp-content\/uploads\/2017\/09\/image-1024x519.jpeg 1024w, https:\/\/viewonphysics.gr\/wp-content\/uploads\/2017\/09\/image.jpeg 1209w\" sizes=\"auto, (max-width: 336px) 100vw, 336px\" \/><p id=\"caption-attachment-5823\" class=\"wp-caption-text\">\u0386\u03c3\u03ba\u03b7\u03c3\u03b7 12<\/p><\/div><\/li>\n<li>\u0388\u03bd\u03b1 \u03ba\u03b9\u03b2\u03ce\u03c4\u03b9\u03bf 60kg \u03c4\u03bf \u03c3\u03ad\u03c1\u03bd\u03bf\u03c5\u03bc\u03b5 \u03c3\u03c4\u03bf \u03bf\u03c1\u03b9\u03b6\u03cc\u03bd\u03c4\u03b9\u03bf \u03c0\u03ac\u03c4\u03c9\u03bc\u03b1 \u03bc\u03b5 \u03bc\u03af\u03b1 \u03bf\u03c1\u03b9\u03b6\u03cc\u03bd\u03c4\u03b9\u03b1 \u03b4\u03cd\u03bd\u03b1\u03bc\u03b7 200\u039d. \u039f \u03c3\u03c5\u03bd\u03c4\u03b5\u03bb\u03b5\u03c3\u03c4\u03ae\u03c2 \u03c4\u03b7\u03c2 \u03c4\u03c1\u03b9\u03b2\u03ae\u03c2 \u03bf\u03bb\u03af\u03b8\u03b7\u03c3\u03b7\u03c2 \u03b5\u03af\u03bd\u03b1\u03b9 \u03bc=0,3. \u0392\u03c1\u03b5\u03c2:\n<ol>\n<li>\u03a0\u03cc\u03c3\u03bf \u03b5\u03af\u03bd\u03b1\u03b9 \u03c4\u03bf \u03ad\u03c1\u03b3\u03bf \u03c0\u03bf\u03c5 \u03c7\u03c1\u03b5\u03b9\u03ac\u03c3\u03c4\u03b7\u03ba\u03b5 \u03b3\u03b9\u03b1 \u03bd\u03b1 \u03c5\u03c0\u03b5\u03c1\u03b2\u03bf\u03cd\u03bc\u03b5 \u03c4\u03b7\u03bd \u03c4\u03c1\u03b9\u03b2\u03ae.<\/li>\n<li>\u03a0\u03cc\u03c3\u03bf \u03b5\u03af\u03bd\u03b1\u03b9 \u03c4\u03bf \u03ad\u03c1\u03b3\u03bf \u03c0\u03bf\u03c5 \u03c0\u03ae\u03b3\u03b5 \u03c3\u03c4\u03b7\u03bd \u03b5\u03c0\u03b9\u03c4\u03ac\u03c7\u03c5\u03bd\u03c3\u03b7 \u03c4\u03bf\u03c5 \u03ba\u03b9\u03b2\u03ce\u03c4\u03b9\u03bf\u03c5;<\/li>\n<\/ol>\n<\/li>\n<li>\u039a\u03b9\u03b2\u03ce\u03c4\u03b9\u03bf \u03bc\u03ac\u03b6\u03b1\u03c2 20kg \u03b2\u03c1\u03af\u03c3\u03ba\u03b5\u03c4\u03b1\u03b9 \u03b1\u03ba\u03af\u03bd\u03b7\u03c4\u03bf \u03c0\u03ac\u03bd\u03c9 \u03c3\u03b5 \u03bf\u03c1\u03b9\u03b6\u03cc\u03bd\u03c4\u03b9\u03bf \u03b5\u03c0\u03af\u03c0\u03b5\u03b4\u03bf. \u039c\u03b5 \u03c4\u03b7 \u03b2\u03bf\u03ae\u03b8\u03b5\u03b9\u03b1 \u03bd\u03ae\u03bc\u03b1\u03c4\u03bf\u03c2 \u03b1\u03c3\u03ba\u03bf\u03cd\u03bc\u03b5 \u03c0\u03ac\u03bd\u03c9 \u03c4\u03bf\u03c5 \u03b4\u03cd\u03bd\u03b1\u03bc\u03b7 100\u039d \u03c5\u03c0\u03cc \u03b3\u03c9\u03bd\u03af\u03b1 30<sup>0<\/sup> \u03bc\u03b5 \u03c4\u03b7\u03bd \u03bf\u03c1\u03b9\u03b6\u03cc\u03bd\u03c4\u03b9\u03b1 \u03b4\u03b9\u03b5\u03cd\u03b8\u03c5\u03bd\u03c3\u03b7 \u03ba\u03b1\u03b9 \u03c4\u03bf \u03b5\u03c0\u03b9\u03c4\u03b1\u03c7\u03cd\u03bd\u03bf\u03c5\u03bc\u03b5 \u03bc\u03b5 3m\/s<sup>2<\/sup>. \u03a5\u03c0\u03bf\u03bb\u03cc\u03b3\u03b9\u03c3\u03b5:\n<ol>\n<li>\u03a4\u03bf \u03ad\u03c1\u03b3\u03bf \u03c0\u03bf\u03c5 \u03b5\u03ba\u03c4\u03b5\u03bb\u03b5\u03af \u03ba\u03ac\u03b8\u03b5 \u03b4\u03cd\u03bd\u03b1\u03bc\u03b7 \u03c0\u03bf\u03c5 \u03b1\u03c3\u03ba\u03b5\u03af\u03c4\u03b1\u03b9 \u03c0\u03ac\u03bd\u03c9 \u03c3\u03c4\u03bf \u03ba\u03b9\u03b2\u03ce\u03c4\u03b9\u03bf.<\/li>\n<li>\u03a4\u03bf \u03c3\u03c5\u03bd\u03bf\u03bb\u03b9\u03ba\u03cc \u03ad\u03c1\u03b3\u03bf \u03cc\u03bb\u03c9\u03bd \u03c4\u03c9\u03bd \u03b4\u03c5\u03bd\u03ac\u03bc\u03b5\u03c9\u03bd.<\/li>\n<\/ol>\n<p><div id=\"attachment_5858\" style=\"width: 336px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-5858\" class=\" wp-image-5858\" src=\"https:\/\/viewonphysics.gr\/wp-content\/uploads\/2017\/09\/image-6-300x162.jpeg\" alt=\"\" width=\"326\" height=\"176\" srcset=\"https:\/\/viewonphysics.gr\/wp-content\/uploads\/2017\/09\/image-6-300x162.jpeg 300w, https:\/\/viewonphysics.gr\/wp-content\/uploads\/2017\/09\/image-6-768x416.jpeg 768w, https:\/\/viewonphysics.gr\/wp-content\/uploads\/2017\/09\/image-6-1024x554.jpeg 1024w, https:\/\/viewonphysics.gr\/wp-content\/uploads\/2017\/09\/image-6.jpeg 1278w\" sizes=\"auto, (max-width: 326px) 100vw, 326px\" \/><p id=\"caption-attachment-5858\" class=\"wp-caption-text\">\u0386\u03c3\u03ba\u03b7\u03c3\u03b7 14<\/p><\/div><\/li>\n<li>\u039c\u03b5 \u03c4\u03b7 \u03b2\u03bf\u03ae\u03b8\u03b5\u03b9\u03b1 \u03b3\u03b5\u03c1\u03b1\u03bd\u03bf\u03cd \u03b1\u03bd\u03c5\u03c8\u03ce\u03bd\u03bf\u03c5\u03bc\u03b5 \u03ad\u03bd\u03b1 \u03ba\u03bf\u03bd\u03c4\u03ad\u03b9\u03bd\u03b5\u03c1 \u03b2\u03ac\u03c1\u03bf\u03c5\u03c2 \u0392=5000\u039d. \u0397 \u03b1\u03bd\u03c5\u03c8\u03c9\u03c4\u03b9\u03ba\u03ae \u03b4\u03cd\u03bd\u03b1\u03bc\u03b7 \u03c4\u03bf\u03c5 \u03b3\u03b5\u03c1\u03b1\u03bd\u03bf\u03cd \u03b5\u03af\u03bd\u03b1\u03b9 F=6000\u039d \u03b3\u03b9\u03b1 \u03c4\u03b1 \u03c0\u03c1\u03ce\u03c4\u03b1 6m \u03ba\u03b1\u03b9 \u03ba\u03b1\u03c4\u03cc\u03c0\u03b9\u03bd \u03b5\u03bb\u03b1\u03c4\u03c4\u03ce\u03bd\u03b5\u03c4\u03b1\u03b9 \u03bc\u03ad\u03c7\u03c1\u03b9 \u03bd\u03b1 \u03c4\u03bf\u03c0\u03bf\u03b8\u03b5\u03c4\u03b7\u03b8\u03b5\u03af \u03c4\u03bf \u03ba\u03bf\u03bd\u03c4\u03ad\u03b9\u03bd\u03b5\u03c1 \u03c3\u03b5 \u03cd\u03c8\u03bf\u03c2 10m.\n<ol>\n<li>\u03a0\u03cc\u03c3\u03bf \u03b5\u03af\u03bd\u03b1\u03b9 \u03c4\u03bf \u03c3\u03c5\u03bd\u03bf\u03bb\u03b9\u03ba\u03cc \u03ad\u03c1\u03b3\u03bf \u03c4\u03b7\u03c2 \u03b1\u03bd\u03c5\u03c8\u03c9\u03c4\u03b9\u03ba\u03ae\u03c2 \u03b4\u03cd\u03bd\u03b1\u03bc\u03b7\u03c2 \u03b3\u03b9\u03b1 \u03bd\u03b1 \u03c4\u03bf\u03c0\u03bf\u03b8\u03b5\u03c4\u03b7\u03b8\u03b5\u03af \u03c4\u03bf \u03ba\u03bf\u03bd\u03c4\u03ad\u03b9\u03bd\u03b5\u03c1 \u03c3\u03c4\u03b1 10m;<\/li>\n<li>\u03a0\u03ce\u03c2 \u03ba\u03b1\u03c4\u03b1\u03bd\u03ad\u03bc\u03b5\u03c4\u03b1\u03b9 \u03b1\u03c5\u03c4\u03cc \u03c3\u03c4\u03b1 \u03c0\u03c1\u03ce\u03c4\u03b1 6m \u03ba\u03b1\u03b9 \u03c3\u03c4\u03bf \u03c5\u03c0\u03cc\u03bb\u03bf\u03b9\u03c0\u03bf \u03c4\u03b7\u03c2 \u03b4\u03b9\u03b1\u03b4\u03c1\u03bf\u03bc\u03ae\u03c2;<\/li>\n<\/ol>\n<p><div id=\"attachment_5853\" style=\"width: 328px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-5853\" class=\" wp-image-5853\" src=\"https:\/\/viewonphysics.gr\/wp-content\/uploads\/2017\/09\/image-4-300x235.jpeg\" alt=\"\" width=\"318\" height=\"249\" srcset=\"https:\/\/viewonphysics.gr\/wp-content\/uploads\/2017\/09\/image-4-300x235.jpeg 300w, https:\/\/viewonphysics.gr\/wp-content\/uploads\/2017\/09\/image-4-768x602.jpeg 768w, https:\/\/viewonphysics.gr\/wp-content\/uploads\/2017\/09\/image-4-1024x802.jpeg 1024w, https:\/\/viewonphysics.gr\/wp-content\/uploads\/2017\/09\/image-4.jpeg 1255w\" sizes=\"auto, (max-width: 318px) 100vw, 318px\" \/><p id=\"caption-attachment-5853\" class=\"wp-caption-text\">\u0386\u03c3\u03ba\u03b7\u03c3\u03b7 15<\/p><\/div><\/li>\n<li>\u0388\u03bd\u03b1\u03c2 \u03b5\u03c1\u03b3\u03ac\u03c4\u03b7\u03c2 \u03b8\u03ad\u03bb\u03b5\u03b9 \u03bd\u03b1 \u03b1\u03bd\u03b5\u03b2\u03ac\u03c3\u03b5\u03b9 \u03ad\u03bd\u03b1 \u03b2\u03b1\u03c1\u03cd \u03ba\u03b9\u03b2\u03ce\u03c4\u03b9\u03bf \u03c3\u03b5 \u03cd\u03c8\u03bf\u03c2 2m. \u0393\u03b9\u03b1 \u03c4\u03bf \u03c3\u03ba\u03bf\u03c0\u03cc \u03b1\u03c5\u03c4\u03cc \u03ad\u03c7\u03b5\u03b9 \u03c3\u03c4\u03b7 \u03b4\u03b9\u03ac\u03b8\u03b5\u03c3\u03ae \u03c4\u03bf\u03c5 \u03b4\u03cd\u03bf \u03c3\u03b1\u03bd\u03af\u03b4\u03b5\u03c2, \u03c4\u03b9\u03c2 \u03bf\u03c0\u03bf\u03af\u03b5\u03c2 \u03bc\u03c0\u03bf\u03c1\u03b5\u03af \u03bd\u03b1 \u03c7\u03c1\u03b7\u03c3\u03b9\u03bc\u03bf\u03c0\u03bf\u03b9\u03ae\u03c3\u03b5\u03b9 \u03c3\u03ad\u03c1\u03bd\u03bf\u03bd\u03c4\u03b1\u03c2 \u03b5\u03c0\u03ac\u03bd\u03c9 \u03c4\u03bf\u03c5\u03c2 \u03c4\u03bf \u03ba\u03b9\u03b2\u03ce\u03c4\u03b9\u03bf. \u03a4\u03b7 \u03bc\u03af\u03b1 \u03bc\u03c0\u03bf\u03c1\u03b5\u03af \u03bd\u03b1 \u03c4\u03b7 \u03b2\u03ac\u03bb\u03b5\u03b9 \u03c5\u03c0\u03cc \u03b3\u03c9\u03bd\u03af\u03b1 45<sup>0<\/sup> \u03bc\u03b5 \u03c4\u03bf \u03bf\u03c1\u03b9\u03b6\u03cc\u03bd\u03c4\u03b9\u03bf \u03b5\u03c0\u03af\u03c0\u03b5\u03b4\u03bf \u03ba\u03b1\u03b9 \u03c4\u03b7\u03bd \u03ac\u03bb\u03bb\u03b7 \u03c5\u03c0\u03cc \u03b3\u03c9\u03bd\u03af\u03b1 30<sup>0<\/sup>. \u039d\u03b1 \u03c3\u03c5\u03b3\u03ba\u03c1\u03af\u03bd\u03b5\u03b9\u03c2 \u03c4\u03bf \u03ad\u03c1\u03b3\u03bf \u03c0\u03bf\u03c5 \u03c7\u03c1\u03b5\u03b9\u03ac\u03b6\u03b5\u03c4\u03b1\u03b9 \u03bd\u03b1 \u03b5\u03ba\u03c4\u03b5\u03bb\u03ad\u03c3\u03b5\u03b9 \u03bf \u03b5\u03c1\u03b3\u03ac\u03c4\u03b7\u03c2 \u03c3\u03b5 \u03ba\u03ac\u03b8\u03b5 \u03c0\u03b5\u03c1\u03af\u03c0\u03c4\u03c9\u03c3\u03b7, \u03cc\u03c4\u03b1\u03bd:\n<ol>\n<li>\u0394\u03b5 \u03bb\u03ac\u03b2\u03bf\u03c5\u03bc\u03b5 \u03c5\u03c0\u03cc\u03c8\u03b7 \u03c4\u03b9\u03c2 \u03c4\u03c1\u03b9\u03b2\u03ad\u03c2 \u03c4\u03bf\u03c5 \u03ba\u03b9\u03b2\u03c9\u03c4\u03af\u03bf\u03c5 \u03bc\u03b5 \u03c4\u03b9\u03c2 \u03c3\u03b1\u03bd\u03af\u03b4\u03b5\u03c2.<\/li>\n<li>\u039f \u03c3\u03c5\u03bd\u03c4\u03b5\u03bb\u03b5\u03c3\u03c4\u03ae\u03c2 \u03c4\u03c1\u03b9\u03b2\u03ae\u03c2 \u03bc\u03b5\u03c4\u03b1\u03be\u03cd \u03c4\u03bf\u03c5 \u03ba\u03b9\u03b2\u03ce\u03c4\u03b9\u03bf\u03c5 \u03ba\u03b1\u03b9 \u03c4\u03c9\u03bd \u03c3\u03b1\u03bd\u03af\u03b4\u03c9\u03bd \u03b5\u03af\u03bd\u03b1\u03b9 \u03bc.<\/li>\n<\/ol>\n<p><div id=\"attachment_5827\" style=\"width: 388px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-5827\" class=\" wp-image-5827\" src=\"https:\/\/viewonphysics.gr\/wp-content\/uploads\/2017\/09\/image-1-300x127.jpeg\" alt=\"\" width=\"378\" height=\"160\" srcset=\"https:\/\/viewonphysics.gr\/wp-content\/uploads\/2017\/09\/image-1-300x127.jpeg 300w, https:\/\/viewonphysics.gr\/wp-content\/uploads\/2017\/09\/image-1-768x326.jpeg 768w, https:\/\/viewonphysics.gr\/wp-content\/uploads\/2017\/09\/image-1-1024x434.jpeg 1024w, https:\/\/viewonphysics.gr\/wp-content\/uploads\/2017\/09\/image-1.jpeg 1375w\" sizes=\"auto, (max-width: 378px) 100vw, 378px\" \/><p id=\"caption-attachment-5827\" class=\"wp-caption-text\">\u0386\u03c3\u03ba\u03b7\u03c3\u03b7 16<\/p><\/div><\/li>\n<li>\u0388\u03bd\u03b1 \u03c3\u03ce\u03bc\u03b1 \u03bc\u03ac\u03b6\u03b1\u03c2 20kg \u03b1\u03c6\u03ae\u03bd\u03b5\u03c4\u03b1\u03b9 \u03bd\u03b1 \u03ba\u03b9\u03bd\u03b7\u03b8\u03b5\u03af \u03b1\u03c0\u03cc \u03c4\u03b7\u03bd \u03ba\u03bf\u03c1\u03c5\u03c6\u03ae \u03ba\u03b5\u03ba\u03bb\u03b9\u03bc\u03ad\u03bd\u03bf\u03c5 \u03b5\u03c0\u03b9\u03c0\u03ad\u03b4\u03bf\u03c5 \u03b3\u03c9\u03bd\u03af\u03b1\u03c2 \u03b8=30<sup>0 <\/sup>\u03ba\u03b1\u03b9 \u03bc\u03ae\u03ba\u03bf\u03c5\u03c2 l=12m. \u03a5\u03c0\u03bf\u03bb\u03cc\u03b3\u03b9\u03c3\u03b5 \u03c4\u03bf \u03ad\u03c1\u03b3\u03bf \u03c0\u03bf\u03c5 \u03b5\u03ba\u03c4\u03b5\u03bb\u03b5\u03af\u03c4\u03b1\u03b9 \u03b1\u03c0\u03cc \u03ba\u03ac\u03b8\u03b5 \u03b4\u03cd\u03bd\u03b1\u03bc\u03b7 \u03c0\u03bf\u03c5 \u03b1\u03c3\u03ba\u03b5\u03af\u03c4\u03b1\u03b9 \u03c0\u03ac\u03bd\u03c9 \u03c3\u03c4\u03bf \u03c3\u03ce\u03bc\u03b1 \u03ba\u03b1\u03b8\u03ce\u03c2 \u03ba\u03b1\u03b9 \u03c4\u03bf \u03c3\u03c5\u03bd\u03bf\u03bb\u03b9\u03ba\u03cc \u03ad\u03c1\u03b3\u03bf \u03cc\u03bb\u03c9\u03bd \u03c4\u03c9\u03bd \u03b4\u03c5\u03bd\u03ac\u03bc\u03b5\u03c9\u03bd, \u03ba\u03b1\u03c4\u03ac \u03c4\u03b7\u03bd \u03ba\u03af\u03bd\u03b7\u03c3\u03b7 \u03c4\u03bf\u03c5 \u03c3\u03ce\u03bc\u03b1\u03c4\u03bf\u03c2 \u03b1\u03c0\u03cc \u03c4\u03b7\u03bd \u03ba\u03bf\u03c1\u03c5\u03c6\u03ae \u03c0\u03c1\u03bf\u03c2 \u03c4\u03b7 \u03b2\u03ac\u03c3\u03b7, \u03cc\u03c4\u03b1\u03bd \u03c4\u03bf \u03ba\u03b5\u03ba\u03bb\u03b9\u03bc\u03ad\u03bd\u03bf \u03b5\u03c0\u03af\u03c0\u03b5\u03b4\u03bf:\n<ol>\n<li>\u0394\u03b5\u03bd \u03ad\u03c7\u03b5\u03b9 \u03c4\u03c1\u03b9\u03b2\u03ad\u03c2.<\/li>\n<li>\u0388\u03c7\u03b5\u03b9 \u03c3\u03c5\u03bd\u03c4\u03b5\u03bb\u03b5\u03c3\u03c4\u03ae \u03c4\u03c1\u03b9\u03b2\u03ae\u03c2 \u03bf\u03bb\u03af\u03c3\u03b8\u03b7\u03c3\u03b7\u03c2 \u03bc\u03b5 \u03c4\u03bf \u03c3\u03ce\u03bc\u03b1 \u03bc=0,3.<\/li>\n<\/ol>\n<p><div id=\"attachment_5842\" style=\"width: 384px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-5842\" class=\" wp-image-5842\" src=\"https:\/\/viewonphysics.gr\/wp-content\/uploads\/2017\/09\/image-2-300x194.jpeg\" alt=\"\" width=\"374\" height=\"242\" srcset=\"https:\/\/viewonphysics.gr\/wp-content\/uploads\/2017\/09\/image-2-300x194.jpeg 300w, https:\/\/viewonphysics.gr\/wp-content\/uploads\/2017\/09\/image-2-768x496.jpeg 768w, https:\/\/viewonphysics.gr\/wp-content\/uploads\/2017\/09\/image-2-1024x661.jpeg 1024w, https:\/\/viewonphysics.gr\/wp-content\/uploads\/2017\/09\/image-2-280x180.jpeg 280w, https:\/\/viewonphysics.gr\/wp-content\/uploads\/2017\/09\/image-2.jpeg 1309w\" sizes=\"auto, (max-width: 374px) 100vw, 374px\" \/><p id=\"caption-attachment-5842\" class=\"wp-caption-text\">\u0386\u03c3\u03ba\u03b7\u03c3\u03b7 17<\/p><\/div><\/li>\n<li>\u03a4\u03bf \u03c3\u03ce\u03bc\u03b1 \u03ad\u03c7\u03b5\u03b9 \u03bc\u03ac\u03b6\u03b1 10kg \u03ba\u03b1\u03b9 \u03b2\u03c1\u03af\u03c3\u03ba\u03b5\u03c4\u03b1\u03b9 \u03c0\u03ac\u03bd\u03c9 \u03c3\u03b5 \u03ba\u03b5\u03ba\u03bb\u03b9\u03bc\u03ad\u03bd\u03bf \u03b5\u03c0\u03af\u03c0\u03b5\u03b4\u03bf \u03b3\u03c9\u03bd\u03af\u03b1\u03c2 45<sup>0<\/sup> \u03ba\u03b1\u03b9 \u03bc\u03ae\u03ba\u03bf\u03c5\u03c2 l=2m. \u039c\u03b5 \u03bc\u03af\u03b1 \u03bf\u03c1\u03b9\u03b6\u03cc\u03bd\u03c4\u03b9\u03b1 \u03b4\u03cd\u03bd\u03b1\u03bc\u03b7 F=200N, \u03bc\u03b5 \u03ba\u03b1\u03c4\u03b5\u03cd\u03b8\u03c5\u03bd\u03c3\u03b7 \u03c0\u03c1\u03bf\u03c2 \u03c4\u03b1 \u03b1\u03c1\u03b9\u03c3\u03c4\u03b5\u03c1\u03ac, \u03c3\u03c0\u03c1\u03ce\u03c7\u03bd\u03bf\u03c5\u03bc\u03b5 \u03c4\u03bf \u03c3\u03ce\u03bc\u03b1 \u03c0\u03c1\u03bf\u03c2 \u03c4\u03b1 \u03c0\u03ac\u03bd\u03c9 \u03b5\u03c0\u03af \u03c4\u03bf\u03c5 \u03ba\u03b5\u03ba\u03bb\u03b9\u03bc\u03ad\u03bd\u03bf\u03c5 \u03b5\u03c0\u03b9\u03c0\u03ad\u03b4\u03bf\u03c5. \u03a5\u03c0\u03bf\u03bb\u03cc\u03b3\u03b9\u03c3\u03b5 \u03c4\u03bf \u03ad\u03c1\u03b3\u03bf \u03c0\u03bf\u03c5 \u03b5\u03ba\u03c4\u03b5\u03bb\u03b5\u03af\u03c4\u03b1\u03b9 \u03b1\u03c0\u03cc \u03ba\u03ac\u03b8\u03b5 \u03b4\u03cd\u03bd\u03b1\u03bc\u03b7 \u03c0\u03bf\u03c5 \u03b1\u03c3\u03ba\u03b5\u03af\u03c4\u03b1\u03b9 \u03c0\u03ac\u03bd\u03c9 \u03c3\u03c4\u03bf \u03c3\u03ce\u03bc\u03b1 \u03ba\u03b1\u03b8\u03ce\u03c2 \u03ba\u03b1\u03b9 \u03c4\u03bf \u03c3\u03c5\u03bd\u03bf\u03bb\u03b9\u03ba\u03cc \u03ad\u03c1\u03b3\u03bf \u03cc\u03bb\u03c9\u03bd \u03c4\u03c9\u03bd \u03b4\u03c5\u03bd\u03ac\u03bc\u03b5\u03c9\u03bd, \u03ba\u03b1\u03c4\u03ac \u03c4\u03b7\u03bd \u03ba\u03af\u03bd\u03b7\u03c3\u03b7 \u03c4\u03bf\u03c5 \u03c3\u03ce\u03bc\u03b1\u03c4\u03bf\u03c2 \u03b1\u03c0\u03cc \u03c4\u03b7 \u03b2\u03ac\u03c3\u03b7 \u03c0\u03c1\u03bf\u03c2 \u03c4\u03b7\u03bd \u03ba\u03bf\u03c1\u03c5\u03c6\u03ae, \u03cc\u03c4\u03b1\u03bd \u03c4\u03bf \u03ba\u03b5\u03ba\u03bb\u03b9\u03bc\u03ad\u03bd\u03bf \u03b5\u03c0\u03af\u03c0\u03b5\u03b4\u03bf:\n<ol>\n<li>\u0394\u03b5\u03bd \u03ad\u03c7\u03b5\u03b9 \u03c4\u03c1\u03b9\u03b2\u03ad\u03c2.<\/li>\n<li>\u0388\u03c7\u03b5\u03b9 \u03c3\u03c5\u03bd\u03c4\u03b5\u03bb\u03b5\u03c3\u03c4\u03ae \u03c4\u03c1\u03b9\u03b2\u03ae\u03c2 \u03bf\u03bb\u03af\u03c3\u03b8\u03b7\u03c3\u03b7\u03c2 \u03bc\u03b5 \u03c4\u03bf \u03c3\u03ce\u03bc\u03b1 \u03bc=0,3.<\/li>\n<\/ol>\n<p><div id=\"attachment_5847\" style=\"width: 330px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-5847\" class=\" wp-image-5847\" src=\"https:\/\/viewonphysics.gr\/wp-content\/uploads\/2017\/09\/image-3-300x230.jpeg\" alt=\"\" width=\"320\" height=\"245\" srcset=\"https:\/\/viewonphysics.gr\/wp-content\/uploads\/2017\/09\/image-3-300x230.jpeg 300w, https:\/\/viewonphysics.gr\/wp-content\/uploads\/2017\/09\/image-3-768x588.jpeg 768w, https:\/\/viewonphysics.gr\/wp-content\/uploads\/2017\/09\/image-3-1024x783.jpeg 1024w, https:\/\/viewonphysics.gr\/wp-content\/uploads\/2017\/09\/image-3.jpeg 1345w\" sizes=\"auto, (max-width: 320px) 100vw, 320px\" \/><p id=\"caption-attachment-5847\" class=\"wp-caption-text\">\u0386\u03c3\u03ba\u03b7\u03c3\u03b7 18<\/p><\/div><\/li>\n<li>\u039c\u03af\u03b1 \u03bf\u03c1\u03b9\u03b6\u03cc\u03bd\u03c4\u03b9\u03b1 \u03b4\u03cd\u03bd\u03b1\u03bc\u03b7 \u03b8\u03ad\u03c4\u03b5\u03b9 \u03c3\u03b5 \u03ba\u03af\u03bd\u03b7\u03c3\u03b7 \u03ad\u03bd\u03b1 \u03c3\u03ce\u03bc\u03b1 \u03bc\u03ac\u03b6\u03b1\u03c2 m \u03c0\u03ac\u03bd\u03c9 \u03c3\u03b5 \u03bb\u03b5\u03af\u03b1 \u03bf\u03c1\u03b9\u03b6\u03cc\u03bd\u03c4\u03b9\u03b1 \u03b5\u03c0\u03b9\u03c6\u03ac\u03bd\u03b5\u03b9\u03b1. \u039c\u03b5\u03c4\u03ac \u03b1\u03c0\u03cc \u03bf\u03c1\u03b9\u03c3\u03bc\u03ad\u03bd\u03bf \u03b4\u03b9\u03ac\u03c3\u03c4\u03b7\u03bc\u03b1 \u03c4\u03bf \u03c3\u03ce\u03bc\u03b1 \u03b1\u03c0\u03bf\u03ba\u03c4\u03ac \u03c4\u03b1\u03c7\u03cd\u03c4\u03b7\u03c4\u03b1 \u03c5. \u039d\u03b1 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