{"id":5540,"date":"2014-04-03T14:46:48","date_gmt":"2014-04-03T19:46:48","guid":{"rendered":"http:\/\/www.henryhartley.com\/?p=5540"},"modified":"2014-04-08T08:36:16","modified_gmt":"2014-04-08T13:36:16","slug":"simple-machines-3","status":"publish","type":"post","link":"https:\/\/www.henryhartley.com\/?p=5540","title":{"rendered":"Simple Machines"},"content":{"rendered":"<div id=\"attachment_5543\" style=\"width: 243px\" class=\"wp-caption alignright\"><a href=\"http:\/\/www.henryhartley.com\/wp-content\/uploads\/2014\/04\/img_20140403_079561.jpg\"><img aria-describedby=\"caption-attachment-5543\" loading=\"lazy\" src=\"http:\/\/www.henryhartley.com\/wp-content\/uploads\/2014\/04\/img_20140403_079561-233x350.jpg\" alt=\"Collyn and Her Class\" width=\"233\" height=\"350\" class=\"size-medium wp-image-5543\" srcset=\"https:\/\/www.henryhartley.com\/wp-content\/uploads\/2014\/04\/img_20140403_079561-233x350.jpg 233w, https:\/\/www.henryhartley.com\/wp-content\/uploads\/2014\/04\/img_20140403_079561-682x1024.jpg 682w, https:\/\/www.henryhartley.com\/wp-content\/uploads\/2014\/04\/img_20140403_079561-400x600.jpg 400w, https:\/\/www.henryhartley.com\/wp-content\/uploads\/2014\/04\/img_20140403_079561-800x1200.jpg 800w, https:\/\/www.henryhartley.com\/wp-content\/uploads\/2014\/04\/img_20140403_079561.jpg 1200w\" sizes=\"(max-width: 233px) 100vw, 233px\" \/><\/a><p id=\"caption-attachment-5543\" class=\"wp-caption-text\">Collyn and Her Class<\/p><\/div>\n<p>It&#8217;s that time of year again. One of my very favorite days of the year. It&#8217;s the day I visit the second grade class and demonstrate a few simple machines. You remember those, right? Levers, pulleys, inclined planes? Yes. For the previous two visits, see <a href=\"?p=758\"  title=\"Monday, April 16, 2012\"    target=\"_20120416\">Monday, April 16, 2012<\/a> and <a href=\"?p=2999\" title=\"Wednesday, March 13, 2013\" target=\"_20130313\">Wednesday, March 13, 2013<\/a>.<\/p>\n<p>As you probably know by now, if you have been following my posts for any length of time, the highlight of the day, by far, is the opportunity the second grade students have to pick up their teacher. She&#8217;s not exactly heavy to begin with. But second graders are not really big enough to pick her up, or certainly not easily, anyway. With the strength multiplying &#x201c;magic&#x201d; of pulleys (and a stout rope), it takes only 20% of her weight to lift her off the ground.<\/p>\n<p>Thanks you, Collyn, for letting me have such fun with your class. You&#8217;re a real sport.<\/p>\n<p>Oh, and by the way, happy anniversary, Collyn and Keith!<\/p>\n","protected":false},"excerpt":{"rendered":"<p>It&#8217;s that time of year again. One of my very favorite days of the year. It&#8217;s the day I visit the second grade class and demonstrate a few simple machines. You remember those, right? Levers, pulleys, inclined planes? Yes. For the previous two visits, see Monday, April 16, 2012 and Wednesday, March 13, 2013. As &hellip; <a class=\"read-excerpt\" href=\"https:\/\/www.henryhartley.com\/?p=5540\">Continue reading <span class=\"meta-nav\">&raquo;<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[5,8],"tags":[],"_links":{"self":[{"href":"https:\/\/www.henryhartley.com\/index.php?rest_route=\/wp\/v2\/posts\/5540"}],"collection":[{"href":"https:\/\/www.henryhartley.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.henryhartley.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.henryhartley.com\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.henryhartley.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=5540"}],"version-history":[{"count":4,"href":"https:\/\/www.henryhartley.com\/index.php?rest_route=\/wp\/v2\/posts\/5540\/revisions"}],"predecessor-version":[{"id":5548,"href":"https:\/\/www.henryhartley.com\/index.php?rest_route=\/wp\/v2\/posts\/5540\/revisions\/5548"}],"wp:attachment":[{"href":"https:\/\/www.henryhartley.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=5540"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.henryhartley.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=5540"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.henryhartley.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=5540"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}