{"id":886,"date":"2016-05-01T23:36:36","date_gmt":"2016-05-01T22:36:36","guid":{"rendered":"http:\/\/agora.xtec.cat\/ceippractiques2-lleida\/?p=886"},"modified":"2016-05-02T13:46:53","modified_gmt":"2016-05-02T12:46:53","slug":"la-gravetat","status":"publish","type":"post","link":"https:\/\/agora.xtec.cat\/ceippractiques2-lleida\/4t\/la-gravetat\/","title":{"rendered":"La gravetat"},"content":{"rendered":"<p><span style=\"font-family: verdana,geneva,sans-serif; font-size: 20px;\">La gravetat \u00e9s la for\u00e7a amb la qual la Terra atreu a tots els cossos. Per norma general, encara que no sempre es compleix, com m\u00e9s gran \u00e9s un planeta del sistema solar m\u00e9s alta \u00e9s la seva for\u00e7a de gravetat.<\/span><\/p>\n<table class=\" aligncenter\" style=\"height: 406px; border-color: #ffffff;\" width=\"474\">\n<tbody>\n<tr>\n<td><a href=\"http:\/\/agora.xtec.cat\/ceippractiques2-lleida\/wp-content\/uploads\/usu635\/2016\/05\/Captura-de-pantalla-2016-05-02-a-les-14.32.17.png\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter  wp-image-893\" src=\"http:\/\/agora.xtec.cat\/ceippractiques2-lleida\/wp-content\/uploads\/usu635\/2016\/05\/Captura-de-pantalla-2016-05-02-a-les-14.32.17.png\" alt=\"Captura de pantalla 2016-05-02 a les 14.32.17\" width=\"158\" height=\"319\" srcset=\"https:\/\/agora.xtec.cat\/ceippractiques2-lleida\/wp-content\/uploads\/usu635\/2016\/05\/Captura-de-pantalla-2016-05-02-a-les-14.32.17.png 332w, https:\/\/agora.xtec.cat\/ceippractiques2-lleida\/wp-content\/uploads\/usu635\/2016\/05\/Captura-de-pantalla-2016-05-02-a-les-14.32.17-149x300.png 149w\" sizes=\"auto, (max-width: 158px) 100vw, 158px\" \/><\/a><\/td>\n<td>\n<p style=\"text-align: left;\">D&#8217;acord amb aquestes dades un objecte a J\u00fapiter pesaria dues vegades i mitja el que pesaria a la Terra.<\/p>\n<p style=\"text-align: left;\">En canvi un objecte a la Lluna pesa una sis vegades menys que a la Terra.<\/p>\n<p style=\"text-align: left;\">Saturn \u00e9s una excepci\u00f3: encara que \u00e9s<br \/>\nm\u00e9s gran que la Terra, el mateix objecte all\u00e0 pesaria menys que aqu\u00ed.<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><span style=\"font-family: verdana,geneva,sans-serif; font-size: 20px;\">A l&#8217;antiguitat grega es pensava que un cos com m\u00e9s pesava m\u00e9s r\u00e0pid queia a terra. Galileu <span class=\"st\">(1564 \u2013 1642)<\/span> va preveure que dos cossos caurien al mateix temps sense importar el seu pes si ho fessin en un lloc on no hi hagu\u00e9s aire. Aix\u00f2 \u00e9s el que podeu observar en aquest video, una ploma i una pilota arriben al mateix temps a terra si ho fan en una c\u00e0mara a la que li han extret tot l&#8217;aire.<\/span><br \/>\n<iframe loading=\"lazy\" src=\"https:\/\/www.youtube.com\/embed\/E43-CfukEgs?rel=0&amp;showinfo=0\" width=\"640\" height=\"360\" frameborder=\"0\" allowfullscreen=\"allowfullscreen\"><\/iframe><\/p>\n<p><span style=\"font-family: verdana,geneva,sans-serif; font-size: 20px;\">El mateix van demostrar els astronautes de l&#8217;Apolo XV, a l&#8217;any 1971, en el seu viatge a la lluna quan van deixar caure un martell i una ploma de falc\u00f3.<\/span><br \/>\n<iframe loading=\"lazy\" src=\"https:\/\/www.youtube.com\/embed\/BNEI9wop1KM?rel=0&amp;showinfo=0\" width=\"640\" height=\"360\" frameborder=\"0\" allowfullscreen=\"allowfullscreen\"><\/iframe><\/p>\n","protected":false},"excerpt":{"rendered":"<p>La gravetat \u00e9s la for\u00e7a amb la qual la Terra atreu a tots els cossos. Per norma general, encara que no sempre es compleix, com m\u00e9s gran \u00e9s un planeta del sistema solar m\u00e9s alta \u00e9s la seva for\u00e7a de gravetat.<\/p>\n<p><a href=\"http:\/\/agora.xtec.cat\/ceippractiques2-lleida\/wp-content\/uploads\/usu635\/2016\/05\/Captura-de-pantalla-2016-05-02-a-les-14.32.17.png\"><\/a><\/p>\n<p>D&#8217;acord amb aquestes dades&hellip;  <a href=\"https:\/\/agora.xtec.cat\/ceippractiques2-lleida\/4t\/la-gravetat\/\" title=\"Read La gravetat\">Llegeix m\u00e9s\u00bb<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_bbp_topic_count":0,"_bbp_reply_count":0,"_bbp_total_topic_count":0,"_bbp_total_reply_count":0,"_bbp_voice_count":0,"_bbp_anonymous_reply_count":0,"_bbp_topic_count_hidden":0,"_bbp_reply_count_hidden":0,"_bbp_forum_subforum_count":0,"footnotes":""},"categories":[13],"tags":[],"class_list":["post-886","post","type-post","status-publish","format-standard","hentry","category-4t"],"post_mailing_queue_ids":[],"_links":{"self":[{"href":"https:\/\/agora.xtec.cat\/ceippractiques2-lleida\/wp-json\/wp\/v2\/posts\/886","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/agora.xtec.cat\/ceippractiques2-lleida\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/agora.xtec.cat\/ceippractiques2-lleida\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/agora.xtec.cat\/ceippractiques2-lleida\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/agora.xtec.cat\/ceippractiques2-lleida\/wp-json\/wp\/v2\/comments?post=886"}],"version-history":[{"count":4,"href":"https:\/\/agora.xtec.cat\/ceippractiques2-lleida\/wp-json\/wp\/v2\/posts\/886\/revisions"}],"predecessor-version":[{"id":898,"href":"https:\/\/agora.xtec.cat\/ceippractiques2-lleida\/wp-json\/wp\/v2\/posts\/886\/revisions\/898"}],"wp:attachment":[{"href":"https:\/\/agora.xtec.cat\/ceippractiques2-lleida\/wp-json\/wp\/v2\/media?parent=886"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/agora.xtec.cat\/ceippractiques2-lleida\/wp-json\/wp\/v2\/categories?post=886"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/agora.xtec.cat\/ceippractiques2-lleida\/wp-json\/wp\/v2\/tags?post=886"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}