{"id":971,"date":"2013-01-20T10:36:38","date_gmt":"2013-01-20T07:36:38","guid":{"rendered":"http:\/\/dorjegurung.com\/sciblog\/?page_id=971"},"modified":"2026-03-12T18:31:05","modified_gmt":"2026-03-12T18:31:05","slug":"m5-the-falling-elevator","status":"publish","type":"page","link":"https:\/\/www.dorjegurung.com\/sciblog\/myp4-5-science\/m5-physics\/m5-the-falling-elevator\/","title":{"rendered":"M5 The Falling Elevator"},"content":{"rendered":"\n<p>A woman enters an elevator holding a closed container filled with water.&nbsp; Inside the water there is a spring fastened to the bottom of the container at one end and to a cork at the other end, so that the cork is submerged just below the water surface.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><a href=\"https:\/\/dorjegurung.com\/sciblog\/myp2-3-science\/term-3-puzzlers\/puzzler-7-falling-elevator\/falling-elevator-image\/\" rel=\"attachment wp-att-939 noopener\" target=\"_blank\"><img decoding=\"async\" width=\"97\" height=\"73\" src=\"https:\/\/dorjegurung.com\/sciblog\/wp-content\/uploads\/2013\/01\/falling-elevator-image.png\" alt=\"falling elevator image\" class=\"wp-image-939\" \/><\/a><\/figure>\n\n\n\n<p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp;<\/p>\n\n\n\n<p>Unfortunately, during the elevator\u2019s descent, the steel rope carrying the elevator breaks, and the elevator accelerates in free-fall.&nbsp; Contrary to what you might think happens to the container and its contents, the spring contracts and the cork sinks to the bottom.&nbsp; Why?<a href=\"#_msocom_1\"><br \/>\n<\/a><\/p>\n\n\n\n<p>Concepts involved:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Weight, mass, buoyancy, displacement, free-fall, weightlessness, upthrust, density, gravity.<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>A woman enters an elevator holding a closed container filled with water.&nbsp; Inside the water there is a spring fastened to the bottom of the container at one end and to a cork at the other end, so that the cork is submerged just below the water surface. &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; [&hellip;]<\/p>\n","protected":false},"author":6,"featured_media":2545,"parent":741,"menu_order":0,"comment_status":"open","ping_status":"open","template":"","meta":{"jetpack_post_was_ever_published":false,"footnotes":""},"class_list":["post-971","page","type-page","status-publish","has-post-thumbnail","hentry"],"blocksy_meta":[],"jetpack_sharing_enabled":true,"jetpack_likes_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/P2Y7Kk-fF","_links":{"self":[{"href":"https:\/\/www.dorjegurung.com\/sciblog\/wp-json\/wp\/v2\/pages\/971","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.dorjegurung.com\/sciblog\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.dorjegurung.com\/sciblog\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.dorjegurung.com\/sciblog\/wp-json\/wp\/v2\/users\/6"}],"replies":[{"embeddable":true,"href":"https:\/\/www.dorjegurung.com\/sciblog\/wp-json\/wp\/v2\/comments?post=971"}],"version-history":[{"count":1,"href":"https:\/\/www.dorjegurung.com\/sciblog\/wp-json\/wp\/v2\/pages\/971\/revisions"}],"predecessor-version":[{"id":4128,"href":"https:\/\/www.dorjegurung.com\/sciblog\/wp-json\/wp\/v2\/pages\/971\/revisions\/4128"}],"up":[{"embeddable":true,"href":"https:\/\/www.dorjegurung.com\/sciblog\/wp-json\/wp\/v2\/pages\/741"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.dorjegurung.com\/sciblog\/wp-json\/wp\/v2\/media\/2545"}],"wp:attachment":[{"href":"https:\/\/www.dorjegurung.com\/sciblog\/wp-json\/wp\/v2\/media?parent=971"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}