{"id":39631,"date":"2025-05-15T10:40:23","date_gmt":"2025-05-15T08:40:23","guid":{"rendered":"https:\/\/www.swisslearn.org\/?p=39631"},"modified":"2025-05-16T08:40:16","modified_gmt":"2025-05-16T06:40:16","slug":"energie-mecanique","status":"publish","type":"post","link":"https:\/\/www.swisslearn.org\/?p=39631","title":{"rendered":"Energie m\u00e9canique"},"content":{"rendered":"<p><iframe loading=\"lazy\" title=\"\u00e9nergie m\u00e9canique \ud83d\ude80 : m\u00e9canique coll\u00e8ge et lyc\u00e9e (niveau 3\u00e8me et plus)\" width=\"1290\" height=\"726\" src=\"https:\/\/www.youtube.com\/embed\/S-5Vc2Nk0Wg\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/p>\n<p>L&rsquo;\u00e9nergie m\u00e9canique d&rsquo;un corps est la somme de son \u00e9nergie cin\u00e9tique <em>E<sub>c<\/sub><\/em> et potentielle <em>E<sub>p<\/sub><\/em> :<\/p>\n<div id=\"asavoir\" style=\"text-align: center;\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.swisslearn.org\/wp-content\/ql-cache\/quicklatex.com-b47c0d5c95ed247e78234ca24f339686_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"&#69;&#95;&#99;&#61;&#69;&#95;&#99;&#43;&#69;&#95;&#112;\" title=\"Rendered by QuickLaTeX.com\" height=\"20\" width=\"119\" style=\"vertical-align: -6px;\"\/><\/div>\n<h3><\/h3>\n<h3>Energie cin\u00e9tique<\/h3>\n<p>Un corps en mouvement porte une \u00e9nergie li\u00e9e \u00e0 sa vitesse. Cette \u00e9nergie qu&rsquo;on nomme \u00e9nergie cin\u00e9tique\u00a0 (<em>E<sub>c<\/sub><\/em>) est proportionnelle \u00e0 la masse <em>m<\/em> du corps et au carr\u00e9 de sa vitesse <em>v<\/em> :<\/p>\n<div id=\"asavoir\" style=\"text-align: center;\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.swisslearn.org\/wp-content\/ql-cache\/quicklatex.com-e97381212b68c9fbb582f90c294e6cb9_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"&#69;&#95;&#99;&#61;&#92;&#102;&#114;&#97;&#99;&#123;&#49;&#125;&#123;&#50;&#125;&#109;&#118;&#94;&#50;\" title=\"Rendered by QuickLaTeX.com\" height=\"25\" width=\"96\" style=\"vertical-align: -7px;\"\/><\/div>\n<p>Par exemple l&rsquo;\u00e9nergie cin\u00e9tique d&rsquo;une voiture d&rsquo;une tonne (1&rsquo;000 kg) roulant \u00e0 72 km\/h (20 m\/s) est de <img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.swisslearn.org\/wp-content\/ql-cache\/quicklatex.com-6d0cc929b2b1a01d0bba39c7229581e4_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"&#69;&#95;&#99;&#61;&#92;&#102;&#114;&#97;&#99;&#123;&#49;&#125;&#123;&#50;&#125;&#32;&#92;&#99;&#100;&#111;&#116;&#32;&#49;&#48;&#48;&#48;&#32;&#92;&#99;&#100;&#111;&#116;&#32;&#50;&#48;&#94;&#50;&#61;&#50;&#48;&#48;&#39;&#48;&#48;&#48;&#32;&#92;&#32;&#74;\" title=\"Rendered by QuickLaTeX.com\" height=\"25\" width=\"270\" style=\"vertical-align: -7px;\"\/><br \/>\n\u00c9videmment l&rsquo;\u00e9nergie cin\u00e9tique d&rsquo;un corps immobile (v = 0 m\/s) est nulle.<\/p>\n<h3><\/h3>\n<h3>Energie potentielle<\/h3>\n<p>Un corps porte aussi une autre forme d&rsquo;\u00e9nergie due \u00e0 son poids. Si on monte un objet de masse <em>m<\/em> d&rsquo;une hauteur <em>h<\/em>, on lui conf\u00e8re une \u00e9nergie qu&rsquo;on nomme \u00e9nergie potentielle gravitationnelle <em>E<sub>p<\/sub><\/em> qui est proportionnelle \u00e0 son poids <em>P<\/em> (<em>P = mg<\/em>) et \u00e0 la hauteur <em>h<\/em>\u00a0 :<\/p>\n<div id=\"asavoir\" style=\"text-align: center;\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.swisslearn.org\/wp-content\/ql-cache\/quicklatex.com-0788f11f698e9de6d109e051b94bc9a5_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"&#69;&#95;&#112;&#61;&#109;&#103;&#104;\" title=\"Rendered by QuickLaTeX.com\" height=\"20\" width=\"89\" style=\"vertical-align: -6px;\"\/><\/div>\n<p>Par exemple l&rsquo;\u00e9nergie potentielle d&rsquo;une bille de 100 g (m = 0,1 kg) qui se trouve \u00e0 5 m du sol (h = 5 m) est de <img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.swisslearn.org\/wp-content\/ql-cache\/quicklatex.com-b82b6e5884b5d1ba6754d298edf824a3_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"&#69;&#95;&#112;&#61;&#48;&#44;&#49;&#32;&#92;&#99;&#100;&#111;&#116;&#32;&#57;&#44;&#56;&#49;&#32;&#92;&#99;&#100;&#111;&#116;&#32;&#53;&#61;&#52;&#44;&#57;&#48;&#53;&#32;&#92;&#32;&#32;&#74;\" title=\"Rendered by QuickLaTeX.com\" height=\"20\" width=\"252\" style=\"vertical-align: -6px;\"\/><\/p>\n<p>Pour un objet en mouvement, en g\u00e9n\u00e9ral c&rsquo;est la variation de son \u00e9nergie potentielle qui nous permet de r\u00e9soudre les probl\u00e8me. C&rsquo;est pourquoi vous pouvez mesurer la hauteur d&rsquo;un corps depuis le point le plus bas par lequel il passe.<\/p>\n<p><a href=\"https:\/\/www.swisslearn.org\/?p=38659\">Lien vers des exercices sur l&rsquo;\u00e9nergie m\u00e9canique<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>L&rsquo;\u00e9nergie m\u00e9canique d&rsquo;un corps est la somme de son \u00e9nergie cin\u00e9tique Ec et potentielle Ep : Energie cin\u00e9tique Un corps en mouvement porte une \u00e9nergie li\u00e9e \u00e0 sa vitesse. Cette \u00e9nergie qu&rsquo;on nomme \u00e9nergie cin\u00e9tique\u00a0 (Ec) est proportionnelle \u00e0 la masse m du corps et au carr\u00e9 de sa vitesse v : Par exemple l&rsquo;\u00e9nergie [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[38,49,17,15],"tags":[],"class_list":["post-39631","post","type-post","status-publish","format-standard","hentry","category-cours","category-cours-de-physique","category-mecanique","category-physique"],"blocksy_meta":"","rttpg_featured_image_url":null,"rttpg_author":{"display_name":"Bahram Zaerpour","author_link":"https:\/\/www.swisslearn.org\/?author=1"},"rttpg_comment":0,"rttpg_category":"<a href=\"https:\/\/www.swisslearn.org\/?cat=38\" rel=\"category\">Cours<\/a> <a href=\"https:\/\/www.swisslearn.org\/?cat=49\" rel=\"category\">Cours de physique<\/a> <a href=\"https:\/\/www.swisslearn.org\/?cat=17\" rel=\"category\">M\u00e9canique<\/a> <a href=\"https:\/\/www.swisslearn.org\/?cat=15\" rel=\"category\">Physique<\/a>","rttpg_excerpt":"L&rsquo;\u00e9nergie m\u00e9canique d&rsquo;un corps est la somme de son \u00e9nergie cin\u00e9tique Ec et potentielle Ep : Energie cin\u00e9tique Un corps en mouvement porte une \u00e9nergie li\u00e9e \u00e0 sa vitesse. Cette \u00e9nergie qu&rsquo;on nomme \u00e9nergie cin\u00e9tique\u00a0 (Ec) est proportionnelle \u00e0 la masse m du corps et au carr\u00e9 de sa vitesse v : Par exemple l&rsquo;\u00e9nergie\u2026","_links":{"self":[{"href":"https:\/\/www.swisslearn.org\/index.php?rest_route=\/wp\/v2\/posts\/39631"}],"collection":[{"href":"https:\/\/www.swisslearn.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.swisslearn.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.swisslearn.org\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.swisslearn.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=39631"}],"version-history":[{"count":12,"href":"https:\/\/www.swisslearn.org\/index.php?rest_route=\/wp\/v2\/posts\/39631\/revisions"}],"predecessor-version":[{"id":39648,"href":"https:\/\/www.swisslearn.org\/index.php?rest_route=\/wp\/v2\/posts\/39631\/revisions\/39648"}],"wp:attachment":[{"href":"https:\/\/www.swisslearn.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=39631"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.swisslearn.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=39631"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.swisslearn.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=39631"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}