{"id":9728,"date":"2011-09-07T03:00:20","date_gmt":"2011-09-07T08:00:20","guid":{"rendered":"http:\/\/blogs.scienceforums.net\/swansont\/?p=9728"},"modified":"2011-09-07T03:00:20","modified_gmt":"2011-09-07T08:00:20","slug":"fulfilling-their-expectations","status":"publish","type":"post","link":"http:\/\/blogs.scienceforums.net\/swansont\/archives\/9728","title":{"rendered":"Fulfilling Their Expectations"},"content":{"rendered":"<p><a href=\"http:\/\/pedagoguepadawan.net\/133\/tennisballdemo\/\">The Preconception Eliciting Tennis Ball<\/a><\/p>\n<blockquote><p>While holding the ball near the ceiling, I ask, \u201cWhen the ball is at its peak, what is its velocity?\u201d (They confidently say \u201czero!\u201d)<\/p>\n<p>I now expose their preconception by immediately asking, \u201cWhat is its acceleration?\u201d (The answers are split between \u201c9.8 m\/s\/s\u201d and \u201czero!\u201d depending on the class) I keep the ball near the ceiling and ask one of the students who enthusiastically answered \u201czero!\u201d, \u201cIf its acceleration is zero and its velocity is zero, what would happen to the ball?\u201d After some thought, the student realizes that the ball wouldn\u2019t fall. I then release the ball and it sticks to the ceiling.<\/p><\/blockquote>\n<p><a href=\"http:\/\/twitter.com\/#!\/rjallain\/status\/110890526391275522\">via @rjallain<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>The Preconception Eliciting Tennis Ball While holding the ball near the ceiling, I ask, \u201cWhen the ball is at its peak, what is its velocity?\u201d (They confidently say \u201czero!\u201d) I now expose their preconception by immediately asking, \u201cWhat is its &hellip; <a href=\"http:\/\/blogs.scienceforums.net\/swansont\/archives\/9728\">Continue reading <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[15,39],"tags":[],"class_list":["post-9728","post","type-post","status-publish","format-standard","hentry","category-education","category-physics"],"_links":{"self":[{"href":"http:\/\/blogs.scienceforums.net\/swansont\/wp-json\/wp\/v2\/posts\/9728","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/blogs.scienceforums.net\/swansont\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/blogs.scienceforums.net\/swansont\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/blogs.scienceforums.net\/swansont\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"http:\/\/blogs.scienceforums.net\/swansont\/wp-json\/wp\/v2\/comments?post=9728"}],"version-history":[{"count":0,"href":"http:\/\/blogs.scienceforums.net\/swansont\/wp-json\/wp\/v2\/posts\/9728\/revisions"}],"wp:attachment":[{"href":"http:\/\/blogs.scienceforums.net\/swansont\/wp-json\/wp\/v2\/media?parent=9728"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/blogs.scienceforums.net\/swansont\/wp-json\/wp\/v2\/categories?post=9728"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/blogs.scienceforums.net\/swansont\/wp-json\/wp\/v2\/tags?post=9728"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}