{"id":927,"date":"2026-10-24T13:44:05","date_gmt":"2026-10-24T13:44:05","guid":{"rendered":"https:\/\/madrasty.ma\/cours\/ph-1-les-ondes-mecaniques-progressives\/"},"modified":"2026-10-24T13:44:05","modified_gmt":"2026-10-24T13:44:05","slug":"ph-1-les-ondes-mecaniques-progressives","status":"publish","type":"madrasti_course","link":"https:\/\/madrasty.ma\/ar\/cours\/ph-1-les-ondes-mecaniques-progressives\/","title":{"rendered":"PH 1 : Les ondes m\u00e9caniques progressives"},"content":{"rendered":"<p>Cette premi\u00e8re le\u00e7on de physique de la 2\u00e8me Bac pose les bases de toute l&rsquo;unit\u00e9 \u00ab Ondes \u00bb. On part d&rsquo;exemples concrets \u2014 une corde secou\u00e9e, un ressort, la surface de l&rsquo;eau \u2014 pour d\u00e9finir une onde m\u00e9canique progressive : la perturbation se propage de proche en proche, transporte de l&rsquo;\u00e9nergie, mais pas de mati\u00e8re.<\/p>\n<p>La vid\u00e9o explique ensuite comment distinguer une onde transversale d&rsquo;une onde longitudinale, comment calculer la c\u00e9l\u00e9rit\u00e9 d&rsquo;une onde, ce que repr\u00e9sente l&rsquo;aspect du milieu \u00e0 un instant donn\u00e9, et comment le retard relie le mouvement d&rsquo;un point \u00e0 celui de la source.<\/p>","protected":false},"excerpt":{"rendered":"<p>D\u00e9couvrez ce qu&rsquo;est une onde m\u00e9canique progressive : ondes transversales et longitudinales, c\u00e9l\u00e9rit\u00e9, retard et \u00e9longation d&rsquo;un point du milieu. La premi\u00e8re le\u00e7on de physique de la 2\u00e8me Bac.<\/p>","protected":false},"author":1,"featured_media":929,"template":"","educational_level":[27],"school_subject":[48],"class_list":["post-927","madrasti_course","type-madrasti_course","status-publish","has-post-thumbnail","hentry","educational_level-la-deuxieme-annee-du-baccalaureat-2eme-annee-bac-annee-terminale","school_subject-physique-chimie"],"_links":{"self":[{"href":"https:\/\/madrasty.ma\/ar\/wp-json\/wp\/v2\/madrasti_course\/927","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/madrasty.ma\/ar\/wp-json\/wp\/v2\/madrasti_course"}],"about":[{"href":"https:\/\/madrasty.ma\/ar\/wp-json\/wp\/v2\/types\/madrasti_course"}],"author":[{"embeddable":true,"href":"https:\/\/madrasty.ma\/ar\/wp-json\/wp\/v2\/users\/1"}],"version-history":[{"count":0,"href":"https:\/\/madrasty.ma\/ar\/wp-json\/wp\/v2\/madrasti_course\/927\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/madrasty.ma\/ar\/wp-json\/wp\/v2\/media\/929"}],"wp:attachment":[{"href":"https:\/\/madrasty.ma\/ar\/wp-json\/wp\/v2\/media?parent=927"}],"wp:term":[{"taxonomy":"educational_level","embeddable":true,"href":"https:\/\/madrasty.ma\/ar\/wp-json\/wp\/v2\/educational_level?post=927"},{"taxonomy":"school_subject","embeddable":true,"href":"https:\/\/madrasty.ma\/ar\/wp-json\/wp\/v2\/school_subject?post=927"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}