{"id":3384,"date":"2016-11-18T23:01:27","date_gmt":"2016-11-19T07:01:27","guid":{"rendered":""},"modified":"-0001-11-30T00:00:00","modified_gmt":"-0001-11-30T07:00:00","slug":"3384","status":"publish","type":"post","link":"https:\/\/www.vernier.com\/til\/3384","title":{"rendered":"How do I use two motion detectors or two motion encoders at once to study collisions?"},"content":{"rendered":"<p>The <a href=\"\/product\/dynamics-cart-and-track-system\/\">Dynamics Cart and Track System<\/a> (<nobr>DTS<\/nobr>) and <a href=\"\/product\/motion-detector\/\">Motion Detector<\/a> (<nobr>MD-BTD<\/nobr>) are a great combination for studying collisions. Setting them up is fairly straight forward:<\/p>\n<ol>\n<li>Attach a Motion Detector to each end of the track using a Motion Detector Bracket, included in the DTS kit and available <a href=\"www.vernier.com\/dts-mdb\">separately<\/a>.\n<li>Level the track. Place a cart on the track at rest and observe its motion. Adjust the leveling feet accordingly.\n<li>Place the second cart on the track. Place the two carts end to end near the middle of the track.\n<li>Connect each Motion Detector to a Vernier interface.\n<li>In software, zero each Motion Detector and reverse one of them. Doing so with the two carts near the center of the track will create a common coordinate system for the carts.<\/ol>\n<p>You are now ready to begin your collision investigation. Use the hook-and-pile and magnetic cart tabs to create inelastic and elastic collisions. Use the trigger button on the plunger cart end cap to create superelastic collisions.<\/p>\n<p>Some additional notes:<\/p>\n<ul>\n<li>You may substitute Encoder Carts and Encoder Receivers, from the <a href=\"\/product\/dynamics-cart-and-track-system-with-motion-encoder\/\">Dynamics Cart and Track System with Motion Encoder<\/a> (<nobr>DTS-EC<\/nobr>), for standard carts and Motion Detectors in the directions above. Be sure you have two Encoder Strips on your track, one for each Encoder Cart. A second stripe is available as <a href=\"\/product\/motion-encoder-long-track-strip\/\">Motion Encoder Long Track Strip<\/a> (<nobr>METS-LONG<\/nobr>).\n<li>You can mix and match Motion Detectors and Encoder Receivers, if you have both systems. Zeroing and reversing the Encoder Receivers works the same as it does for Motion Detectors.\n<li>If you have a limited number of sensors, consider doubling up from multiple cart and track systems to set up collision experiments.<\/ul>","protected":false},"excerpt":{"rendered":"<p>The and are a great combination for studying collisions. Setting them up is fairly straight forward: Attach a Motion Detector to each end of the&#8230;<\/p>\n","protected":false},"author":100811,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[],"tags":[4007,3042,5736,8,5735,5737,5354],"class_list":["post-3384","post","type-post","status-publish","format-standard","hentry","tag-dts","tag-dts-ec","tag-elastic-inelastic-superelastic","tag-md-btd","tag-mec-btd","tag-momentum-conservation","tag-vds-ec"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/posts\/3384","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/users\/100811"}],"replies":[{"embeddable":true,"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/comments?post=3384"}],"version-history":[{"count":0,"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/posts\/3384\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/media?parent=3384"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/categories?post=3384"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/tags?post=3384"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}