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@This document (2.3 Riddle 3 - At rest or in motion?) is re-created by administrator on 18 April 2017
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1.5
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    "content": "<h1>Which&nbsp;is at rest and which&nbsp;is in motion?</h1>\r\n\r\n<p><span style=\"font-size: 20px;\">Imagine that you are on a boat and making a&nbsp;video of another boat that is next to you.<br />\r\n<br />\r\nSuppose you have shot&nbsp;a video like this which is as below.&nbsp;<br />\r\n<br />\r\nPlay the video and observe.</span><br />\r\n<br />\r\n<script type=\"text/javascript\" src=\"/static/ndf/bower_components/videojs/dist/video.min.js\"></script> <script type=\"text/javascript\" src=\"/static/ndf/bower_components/videojs/dist/video.js\"></script></p>\r\n\r\n<div id=\"scstyle\">\r\n<div class=\"video-player-area\" id=\"video-player-58f60dea69602a0149e7972e\">\r\n<div class=\"vidbak\">\r\n<video class=\"video-js vjs-skin-colors-clix vjs-big-play-button center\" controls=\"controls\" data-setup=\"{ &quot;playbackRates&quot;: [0.5, 1, 1.5, 2] }\" height=\"360\" id=\"58f60dea69602a0149e7972e\" width=\"480\"><source codecs=\"avc1.42E01E, mp4a.40.2\" crossorigin=\"anonymous\" preload=\"metadata\" src=\"/media/1/8/b/4045970c5d8d9abac909b899aaf4a66b9fa9290c0aca2e5d52b061dce7b1e.mp4\" type=\"video/mp4\" /> <!-- adding captions in different language--></video>\r\n</div>\r\n</div>\r\n<script>\r\n\t\t\tfunction myFunction() { \r\n\t\t\t    var vid = document.getElementById(id);\r\n\t\t\t    document.getElementById(\"mySpan\").innerHTML = \"Seeking: \" + vid.seeking;\r\n\t\t\t} \r\n\t\t\t</script></div>\r\n\r\n<p style=\"text-align: center;\"><span style=\"font-size:18px;\"><strong>Video 2.3 (a): Riddle 3</strong></span></p>\r\n\r\n<blockquote>\r\n<p><span style=\"font-size:20px;\">In these&nbsp;visuals, &nbsp;are you able to sense if the boat is moving or not?</span></p>\r\n</blockquote>\r\n\r\n<p><script type=\"text/javascript\" src=\"/static/ndf/bower_components/videojs/dist/video.min.js\"></script><script type=\"text/javascript\" src=\"/static/ndf/bower_components/videojs/dist/video.js\"></script></p>\r\n\r\n<div id=\"scstyle\">\r\n<div class=\"video-player-area\" id=\"video-player-58f60fbd69602a0148884165\">\r\n<div class=\"vidbak\">\r\n<video class=\"video-js vjs-skin-colors-clix vjs-big-play-button center\" controls=\"controls\" data-setup=\"{ &quot;playbackRates&quot;: [0.5, 1, 1.5, 2] }\" height=\"360\" id=\"58f60fbd69602a0148884165\" width=\"480\"><source codecs=\"avc1.42E01E, mp4a.40.2\" crossorigin=\"anonymous\" preload=\"metadata\" src=\"/media/7/d/a/2d5974df69e5f9ce5b44244dffa863a8ee6392fc1a4323a8b81ff59f54409.mp4\" type=\"video/mp4\" /> <!-- adding captions in different language--></video>\r\n</div>\r\n\r\n<div style=\"text-align: center;\"><span style=\"font-size:18px;\"><strong>Video 2.3 (b): Riddle 3</strong></span></div>\r\n</div>\r\n<script>\r\n\t\t\tfunction myFunction() { \r\n\t\t\t    var vid = document.getElementById(id);\r\n\t\t\t    document.getElementById(\"mySpan\").innerHTML = \"Seeking: \" + vid.seeking;\r\n\t\t\t} \r\n\t\t\t</script></div>\r\n\r\n<blockquote>\r\n<p><span style=\"font-size: 20px;\">How could you sense now if the boat was moving ?&nbsp;</span></p>\r\n</blockquote>\r\n\r\n<p><span style=\"font-size: 20px;\">If two objects move&nbsp;at the same speed, in the same direction then&nbsp;you can not say if they are in motion or are at rest.<br />\r\n<br />\r\nYou feel something is in motion if it changes its motion, speed, or position with respect to you or with respect to some other object in your view.&nbsp;<br />\r\n<br />\r\n<strong>That is why we&nbsp;don't&nbsp;feel the motion of the earth because we are moving with it at the same&nbsp;speed.&nbsp;</strong></span><br />\r\n<br />\r\n&nbsp;</p>\r\n",
    "content_org": "<h1>What is rest and what is in motion?</h1>\r\n\r\n<p><span style=\"font-size: 20px;\">imagine that you are on the other boat and making the video of the other boat next to you. could you tell if the boat next to you was moving or not?<br />\r\n<br />\r\nwhen do you feel if it was moving?<br />\r\n<br />\r\nif two object move&nbsp;at the same speed you can not say if both are moving or not moving? or both are at rest or in motion.<br />\r\n<br />\r\nyou feel something in motion if it changes its motion with respect to you, meaning when its speed changes.<br />\r\n<br />\r\nmay be now you can describe why dont we feel the motion of the earth. we are moving with it at the same constant speed.&nbsp;</span><br />\r\n<br />\r\n&nbsp;</p>",
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