{"id":8898,"date":"2014-01-03T09:25:59","date_gmt":"2014-01-03T14:25:59","guid":{"rendered":"http:\/\/scienceblogs.com\/principles\/?p=8898"},"modified":"2014-01-03T09:25:59","modified_gmt":"2014-01-03T14:25:59","slug":"physics-with-the-kids-at-120-frames-a-second","status":"publish","type":"post","link":"http:\/\/chadorzel.com\/principles\/2014\/01\/03\/physics-with-the-kids-at-120-frames-a-second\/","title":{"rendered":"Physics with the Kids at 120 Frames a Second"},"content":{"rendered":"<p>I got a new camera for Christmas, not because there&#8217;s anything wrong with my DSLR, but because I wanted something that could do high-speed video. So I now have a Casio point-and-shoot camera that will record up to 1000 frames per second, woo-hoo!<\/p>\n<p>To break it in, I got the kids to help out by re-creating a classic slow-mo physics trick: the slinky drop:<\/p>\n<p><iframe loading=\"lazy\" width=\"560\" height=\"315\" src=\"\/\/www.youtube.com\/embed\/2ugHpDuu3a0?list=UU7ymL5G00acSuo0KJi9tPeQ\" frameborder=\"0\" allowfullscreen><\/iframe><\/p>\n<p>Note that when SteelyKid lets it go, the bottom doesn&#8217;t really move until after the entire length of the spring has relaxed. You can clearly see this in the still frame that&#8217;s the &#8220;featured image&#8221; at the top of the post.<\/p>\n<p>And since The Pip has to do exactly what his sister does, here&#8217;s a similar clip with the slinky starting at a much lower altitude:<\/p>\n<p><iframe loading=\"lazy\" width=\"560\" height=\"315\" src=\"\/\/www.youtube.com\/embed\/EZ_ou-pKESM?list=UU7ymL5G00acSuo0KJi9tPeQ\" frameborder=\"0\" allowfullscreen><\/iframe><\/p>\n<p>The camera doesn&#8217;t record sound in slow-mo mode, so you can&#8217;t hear him say &#8220;I did it!&#8221; immediately after the slinky hits the ground. Trust me, it&#8217;s ridiculously cute.<\/p>\n<p>And just as a bonus, here&#8217;s a clip of SteelyKid running like a superhero (it takes about 10s before she gets into the frame):<\/p>\n<p><iframe loading=\"lazy\" width=\"560\" height=\"315\" src=\"\/\/www.youtube.com\/embed\/FABj_U83-Dk?list=UU7ymL5G00acSuo0KJi9tPeQ\" frameborder=\"0\" allowfullscreen><\/iframe><\/p>\n<p>These are shot at 120 fps, because that&#8217;s a decent balance between fast enough to look cool (a quarter normal speed) and slow enough to not need a lot of extra light. The resolution gets worse at higher speeds, too&#8211; at 1000 fps, it&#8217;s just a narrow strip across the middle of the field. Still, the quality of the test videos is comparable to that of the high-speed camera we have in the department, which is about 20 years old and cost $30K. Technological progress is awesome.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>I got a new camera for Christmas, not because there&#8217;s anything wrong with my DSLR, but because I wanted something that could do high-speed video. So I now have a Casio point-and-shoot camera that will record up to 1000 frames per second, woo-hoo! To break it in, I got the kids to help out by&hellip; <a class=\"more-link\" href=\"http:\/\/chadorzel.com\/principles\/2014\/01\/03\/physics-with-the-kids-at-120-frames-a-second\/\">Continue reading <span class=\"screen-reader-text\">Physics with the Kids at 120 Frames a Second<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":8899,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[663,19,2,7,11,3,4,136],"tags":[],"class_list":["post-8898","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-everyday","category-experiment","category-personal","category-physics","category-science","category-steelykid","category-the_pip","category-video","entry"],"_links":{"self":[{"href":"http:\/\/chadorzel.com\/principles\/wp-json\/wp\/v2\/posts\/8898","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/chadorzel.com\/principles\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/chadorzel.com\/principles\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/chadorzel.com\/principles\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"http:\/\/chadorzel.com\/principles\/wp-json\/wp\/v2\/comments?post=8898"}],"version-history":[{"count":0,"href":"http:\/\/chadorzel.com\/principles\/wp-json\/wp\/v2\/posts\/8898\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/chadorzel.com\/principles\/wp-json\/wp\/v2\/media\/8899"}],"wp:attachment":[{"href":"http:\/\/chadorzel.com\/principles\/wp-json\/wp\/v2\/media?parent=8898"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/chadorzel.com\/principles\/wp-json\/wp\/v2\/categories?post=8898"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/chadorzel.com\/principles\/wp-json\/wp\/v2\/tags?post=8898"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}