{"id":3735,"date":"2022-02-03T12:40:48","date_gmt":"2022-02-03T11:40:48","guid":{"rendered":"https:\/\/agora.xtec.cat\/sescanet\/?p=3735"},"modified":"2022-02-10T08:16:33","modified_gmt":"2022-02-10T07:16:33","slug":"politges-a-3r-deso","status":"publish","type":"post","link":"https:\/\/agora.xtec.cat\/sescanet\/eso\/politges-a-3r-deso\/","title":{"rendered":"Politges a 3r d&#8217;ESO"},"content":{"rendered":"<p>Avui amb l&#8217;alumnat de 3r d&#8217;ESO, hem experimentat amb unes politges hist\u00f2riques i ben boniques que ens ha deixat en David Ribalta de Construccions Ribalta, S.L. En primer lloc, hem fixat dues taules del centre per a aconseguir un pes prou significatiu. Aleshores, hem intentat aixecar-les amb els bra\u00e7os sense cap ajuda. En segon lloc, les hem aixecat amb l&#8217;ajuda d&#8217;una politja fixa. Finalment, hem col\u00b7locat una politja fixa i una de m\u00f2bil.<\/p>\n<p>\u00d2bviament, hem constatat el que hav\u00edem calculat de forma te\u00f2rica a l&#8217;aula. La construcci\u00f3 d&#8217;una politja fixa i una de m\u00f2bil ens aporta avantatge mec\u00e0nic i per tant, notem clarament que fem menys for\u00e7a (la meitat) per aixecar aquestes taules.<\/p>\n<p>Per contra, ens suposa estirar m\u00e9s quantitat de corda (el doble), at\u00e8s que l&#8217;energia ni es crea ni es destrueix, es transforma. Tamb\u00e9 amb una sola politja fixa, tot i no obtenir avantatge mec\u00e0nic, constatem que aixequem de forma m\u00e9s c\u00f2mode el pes, at\u00e8s que aprofitem el nostre propi pes a l&#8217;hora d&#8217;estirar la corda.<\/p>\n\n\t\t<style type=\"text\/css\">\n\t\t\t#gallery-1 {\n\t\t\t\tmargin: auto;\n\t\t\t}\n\t\t\t#gallery-1 .gallery-item {\n\t\t\t\tfloat: left;\n\t\t\t\tmargin-top: 10px;\n\t\t\t\ttext-align: center;\n\t\t\t\twidth: 33%;\n\t\t\t}\n\t\t\t#gallery-1 img {\n\t\t\t\tborder: 2px solid #cfcfcf;\n\t\t\t}\n\t\t\t#gallery-1 .gallery-caption {\n\t\t\t\tmargin-left: 0;\n\t\t\t}\n\t\t\t\/* see gallery_shortcode() in wp-includes\/media.php *\/\n\t\t<\/style>\n\t\t<div id='gallery-1' class='gallery galleryid-3735 gallery-columns-3 gallery-size-large'><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/agora.xtec.cat\/sescanet\/wp-content\/uploads\/usu509\/2022\/02\/foto40-scaled.jpg'><img loading=\"lazy\" decoding=\"async\" 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https:\/\/agora.xtec.cat\/sescanet\/wp-content\/uploads\/usu509\/2022\/02\/IMG20220201125457-1152x1536.jpg 1152w, https:\/\/agora.xtec.cat\/sescanet\/wp-content\/uploads\/usu509\/2022\/02\/IMG20220201125457-1536x2048.jpg 1536w, https:\/\/agora.xtec.cat\/sescanet\/wp-content\/uploads\/usu509\/2022\/02\/IMG20220201125457-scaled.jpg 1920w\" sizes=\"auto, (max-width: 768px) 100vw, 768px\" \/><\/a>\n\t\t\t<\/dt><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon portrait'>\n\t\t\t\t<a href='https:\/\/agora.xtec.cat\/sescanet\/wp-content\/uploads\/usu509\/2022\/02\/IMG20220201110052-scaled.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"768\" height=\"1024\" src=\"https:\/\/agora.xtec.cat\/sescanet\/wp-content\/uploads\/usu509\/2022\/02\/IMG20220201110052-768x1024.jpg\" class=\"attachment-large size-large\" alt=\"\" srcset=\"https:\/\/agora.xtec.cat\/sescanet\/wp-content\/uploads\/usu509\/2022\/02\/IMG20220201110052-768x1024.jpg 768w, https:\/\/agora.xtec.cat\/sescanet\/wp-content\/uploads\/usu509\/2022\/02\/IMG20220201110052-225x300.jpg 225w, https:\/\/agora.xtec.cat\/sescanet\/wp-content\/uploads\/usu509\/2022\/02\/IMG20220201110052-1152x1536.jpg 1152w, https:\/\/agora.xtec.cat\/sescanet\/wp-content\/uploads\/usu509\/2022\/02\/IMG20220201110052-1536x2048.jpg 1536w, https:\/\/agora.xtec.cat\/sescanet\/wp-content\/uploads\/usu509\/2022\/02\/IMG20220201110052-scaled.jpg 1920w\" sizes=\"auto, (max-width: 768px) 100vw, 768px\" \/><\/a>\n\t\t\t<\/dt><\/dl><br style=\"clear: both\" \/>\n\t\t<\/div>\n\n","protected":false},"excerpt":{"rendered":"<p>Avui amb l&#8217;alumnat de 3r d&#8217;ESO, hem experimentat amb unes politges hist\u00f2riques.&hellip;  <a href=\"https:\/\/agora.xtec.cat\/sescanet\/eso\/politges-a-3r-deso\/\" title=\"Read Politges a 3r d&#8217;ESO\">Llegeix m\u00e9s\u00bb<\/a><\/p>\n","protected":false},"author":1,"featured_media":3742,"comment_status":"closed","ping_status":"closed","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":[3,6,29],"tags":[108,113,93,122],"class_list":["post-3735","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-eso","category-eso-3","category-portada","tag-eso","tag-projecte","tag-steamcat","tag-tecnologia"],"post_mailing_queue_ids":[],"_links":{"self":[{"href":"https:\/\/agora.xtec.cat\/sescanet\/wp-json\/wp\/v2\/posts\/3735","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/agora.xtec.cat\/sescanet\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/agora.xtec.cat\/sescanet\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/agora.xtec.cat\/sescanet\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/agora.xtec.cat\/sescanet\/wp-json\/wp\/v2\/comments?post=3735"}],"version-history":[{"count":2,"href":"https:\/\/agora.xtec.cat\/sescanet\/wp-json\/wp\/v2\/posts\/3735\/revisions"}],"predecessor-version":[{"id":3743,"href":"https:\/\/agora.xtec.cat\/sescanet\/wp-json\/wp\/v2\/posts\/3735\/revisions\/3743"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/agora.xtec.cat\/sescanet\/wp-json\/wp\/v2\/media\/3742"}],"wp:attachment":[{"href":"https:\/\/agora.xtec.cat\/sescanet\/wp-json\/wp\/v2\/media?parent=3735"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/agora.xtec.cat\/sescanet\/wp-json\/wp\/v2\/categories?post=3735"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/agora.xtec.cat\/sescanet\/wp-json\/wp\/v2\/tags?post=3735"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}