{"id":246081,"date":"2016-07-18T02:00:00","date_gmt":"2016-07-17T23:00:00","guid":{"rendered":"http:\/\/www.fyysika.ee\/?guid=432094b635c10b9c28900313f532e54c"},"modified":"2016-07-18T02:00:00","modified_gmt":"2016-07-17T23:00:00","slug":"modelling-of-a-collision-between-two-smartphones","status":"publish","type":"post","link":"https:\/\/www.fyysika.ee\/?p=246081","title":{"rendered":"Modelling of a collision between two smartphones"},"content":{"rendered":"<p>In the predominant approach in physics textbooks, the collision between particles is treated as a<br \/>\nblack box, where no physical quantity can be measured. This approach becomes even more evident in<br \/>\nexperimental classes where collisions are the simplest and most common way of applying the theorem<br \/>\nof conservation of linear momentum in the asymptotic behavior. In this paper we develop and analyse<br \/>\nan experiment on collisions using only two smartphones. The experimental setup is amazingly simple;<br \/>\nthe two devices are aligned on a horizontal table of lacquered wood, in order to slide more easily.<br \/>\nAt the edge of one of them a piece of common sponge is glued using double-sided tape. By using a<br \/>\nfree smartphone application, the values generated by the accelerometer of the two devices in full<br \/>\nmotion are measured and tabulated. Through numerical iteration, the speed graphs of the smartphones<br \/>\nbefore, during, and after the collision are obtained. The main conclusions were: (i) the<br \/>\ndemonstration &#8230;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In the predominant approach in physics textbooks, the collision between particles is treated as a<br \/>\nblack box, where no physical quantity can be measured. This approach becomes even more evident in<br \/>\nexperimental classes where collisions are the simplest&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_genesis_hide_title":false,"_genesis_hide_breadcrumbs":false,"_genesis_hide_singular_image":false,"_genesis_hide_footer_widgets":false,"_genesis_custom_body_class":"","_genesis_custom_post_class":"","_genesis_layout":"","footnotes":""},"categories":[178],"tags":[],"class_list":{"0":"post-246081","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-rss-fuusikaharidus","7":"entry"},"_links":{"self":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/posts\/246081","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=246081"}],"version-history":[{"count":0,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/posts\/246081\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=246081"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=246081"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=246081"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}