{"id":2076,"date":"2016-03-01T23:53:11","date_gmt":"2016-03-02T07:53:11","guid":{"rendered":""},"modified":"2024-04-22T13:08:26","modified_gmt":"2024-04-22T20:08:26","slug":"2076","status":"publish","type":"post","link":"https:\/\/www.vernier.com\/til\/2076","title":{"rendered":"How do I attach a Photogate and Ultra Pulley to the end of a Vernier Track?"},"content":{"rendered":"<p>A half-Atwood machine, with a cart, string, pulley, and hanging mass, is a common Newton&#8217;s Second Law and kinematics lab. If you have a pulley and photogate in this setup, you can easily collect position, velocity, and acceleration data. <\/p>\n<p>Starting in 2016, the <a href=\"\/product\/pulley-bracket\/\">Pulley Bracket<\/a> (<nobr>B-SPA<\/nobr>) includes a special attachment for the <a href=\"\/product\/photogate\/\">Photogate<\/a> (<nobr>VPG-BTD<\/nobr>). The image below shows how to configure the Pulley Bracket with this special attachment with the Photogate.<\/p>\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"\/files\/til\/images\/2076-b-spa_photogate.jpg\" alt=\"2076-b-spa_photogate.jpg\"\/><\/figure>\n<p>The following video demonstrates how to attach the Pulley Bracket, Photogate, and Ultra Pulley to the track.<\/p>\n<figure class=\"wp-block-video\"><video height=\"1080\" style=\"aspect-ratio: 1920 \/ 1080;\" width=\"1920\" controls src=\"https:\/\/www.vernier.com\/til\/wp-content\/uploads\/sites\/2\/2022\/05\/VPG-BTDB-SPA.mp4\"><\/video><\/figure>\n<p>Some details to note:<\/p>\n<ul class=\"wp-block-list\">\n<li>The Pulley Bracket comes with two thumb screws. When attaching both a photogate and the Ultra Pulley use the longer thumb screw. If you are only attaching the Ultra Pulley, use the shorter thumb screw.<\/li>\n<li>The Pulley Bracket slot allows you to adjust the height of the Ultra Pulley above the top surface of the track. If you are using the photogate\/pulley in a half-Atwood setup, lower the Ultra Pulley to a position where the string &#8211; connected to the cart on one end and a hanging mass on the other &#8211; is parallel to the track; in that position, the force exerted by the string is horizontal, i.e. does not have a vertical component.<\/li>\n<\/ul>\n<p>If you have a <a href=\"\/product\/go-direct-photogate\/\">Go Direct<sup>&reg;<\/sup> Photogate<\/a> (<nobr>GDX-VPG<\/nobr>), you&#8217;ll find the process a bit easier because the Go Direct Photogate was designed with the pulley bracket in mind, the extra attachment for a photogate was molded into the sensor.<\/p>\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"768\" src=\"https:\/\/www.vernier.com\/til\/wp-content\/uploads\/sites\/2\/2022\/05\/GDX-VPG-B-SPA-1024x768.jpg\" alt=\"\" class=\"wp-image-15134\" srcset=\"https:\/\/www.vernier.com\/til\/wp-content\/uploads\/sites\/2\/2022\/05\/GDX-VPG-B-SPA-1024x768.jpg 1024w, https:\/\/www.vernier.com\/til\/wp-content\/uploads\/sites\/2\/2022\/05\/GDX-VPG-B-SPA-600x450.jpg 600w, https:\/\/www.vernier.com\/til\/wp-content\/uploads\/sites\/2\/2022\/05\/GDX-VPG-B-SPA-768x576.jpg 768w, https:\/\/www.vernier.com\/til\/wp-content\/uploads\/sites\/2\/2022\/05\/GDX-VPG-B-SPA-1536x1152.jpg 1536w, https:\/\/www.vernier.com\/til\/wp-content\/uploads\/sites\/2\/2022\/05\/GDX-VPG-B-SPA-2048x1536.jpg 2048w, https:\/\/www.vernier.com\/til\/wp-content\/uploads\/sites\/2\/2022\/05\/GDX-VPG-B-SPA-381x285.jpg 381w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n<p>Prior to the 2016 update to the Pulley Bracket, students used the <a href=\"\/product\/photogate-bracket\/\">Photogate Bracket<\/a> (<nobr>PGB-VDS<\/nobr>) to align the photogate beam with Ultra Pulley. The Photogate Bracket has two sides with different tabs. One side is configured for a vertical position for supporting a photogate over the track surface. The other side has tabs for a 45 degree position.<\/p>\n<p>It is this 45-degree position that allows you to easily support a photogate so that it can read the motion of a pulley.<\/p>\n<p>This image shows how to configure the bracket.<\/p>\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"\/files\/til\/images\/2076-pulley.png\" alt=\"2076-pulley.png\"\/><\/figure>\n<p><a href=\"\/til\/1422\/\">Vernier Photogate (VPG-BTD) Troubleshooting and FAQs<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>A half-Atwood machine, with a cart, string, pulley, and hanging mass, is a common Newton&#8217;s Second Law and kinematics lab. If you have a pulley&#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":[3363,2893,3364,1944,1281],"class_list":["post-2076","post","type-post","status-publish","format-standard","hentry","tag-b-spa","tag-track","tag-upa-spa","tag-vds","tag-vpg-btd"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/posts\/2076","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=2076"}],"version-history":[{"count":0,"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/posts\/2076\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/media?parent=2076"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/categories?post=2076"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/tags?post=2076"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}