{"id":10047,"date":"2026-04-28T16:34:58","date_gmt":"2026-04-28T13:34:58","guid":{"rendered":"https:\/\/chateauegitim.com\/?p=10047"},"modified":"2026-04-28T16:34:59","modified_gmt":"2026-04-28T13:34:59","slug":"10-sinif-fizik-chute-libre-serbest-dusus","status":"publish","type":"post","link":"https:\/\/chateauegitim.com\/fr\/10-sinif-fizik-chute-libre-serbest-dusus\/","title":{"rendered":"10.SINIF \u2013 F\u0130Z\u0130K \u2013 CHUTE LIBRE (SERBEST D\u00dc\u015e\u00dc\u015e)"},"content":{"rendered":"<h2 class=\"wp-block-heading\"><\/h2>\n\n\n\n<p>Quand on laisse tomber un objet d\u2019une certaine hauteur, il chute sous l\u2019action de la gravit\u00e9. Cette force gravitationnelle est toujours dirig\u00e9e vers le centre de la Terre. Elle provoque une acc\u00e9l\u00e9ration appel\u00e9e acc\u00e9l\u00e9ration de la pesanteur, not\u00e9e <em>g<\/em>. \u00c0 proximit\u00e9 de la surface terrestre, sa valeur est d\u2019environ <em>g = 9,8 m\u00b7s\u207b\u00b2<\/em>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">1. Valeurs de l\u2019acc\u00e9l\u00e9ration de la pesanteur<\/h3>\n\n\n\n<p>La valeur de <em>g<\/em> peut l\u00e9g\u00e8rement changer en fonction de l\u2019endroit o\u00f9 se trouve un corps sur Terre ou de l\u2019astre sur lequel il se situe.<br>Par exemple :<br>\u2013 Sur Terre, <em>g \u2248 9,81 m\u00b7s\u207b\u00b2<\/em> ;<br>\u2013 Sur la Lune, <em>g \u2248 1,62 m\u00b7s\u207b\u00b2<\/em>, soit environ six fois plus faible ;<br>\u2013 Sur les autres plan\u00e8tes, <em>g<\/em> d\u00e9pend de leur masse et de leur rayon.<\/p>\n\n\n\n<p>Par cons\u00e9quent, un objet chute bien plus lentement sur la Lune que sur la Terre.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">2. Chute libre dans le vide<\/h3>\n\n\n\n<p>Sans r\u00e9sistance de l\u2019air, tous les objets l\u00e2ch\u00e9s simultan\u00e9ment d\u2019une m\u00eame hauteur subissent la m\u00eame acc\u00e9l\u00e9ration <em>g<\/em>, quelle que soit leur masse.<br>Leur vitesse augmente de mani\u00e8re r\u00e9guli\u00e8re au fil du temps : <em>v = g\u00b7t<\/em>.<br>Quant \u00e0 leur position, elle \u00e9volue proportionnellement au carr\u00e9 du temps : <em>x = 1\/2\u00b7g\u00b7t\u00b2<\/em>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">3. Influence de la r\u00e9sistance de l\u2019air<\/h3>\n\n\n\n<p>Dans des conditions r\u00e9elles, les objets sont soumis \u00e0 une r\u00e9sistance de l\u2019air qui s\u2019oppose \u00e0 leur mouvement. Cette force diminue leur vitesse de chute et peut m\u00eame entra\u00eener l\u2019apparition d\u2019une vitesse limite.<br>Par cons\u00e9quent, deux objets ayant des masses ou des formes diff\u00e9rentes ne tombent pas exactement \u00e0 la m\u00eame vitesse.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">4. Exemple d\u2019\u00e9volution temporelle<\/h3>\n\n\n\n<p>Dans un environnement sans frottement, un objet abandonn\u00e9 sans vitesse initiale.<br>\u2013 apr\u00e8s 1 seconde, <em>v \u2248 10 m\/s<\/em> ;<br>\u2013 apr\u00e8s 2 secondes, <em>v \u2248 20 m\/s<\/em> ;<br>\u2013 apr\u00e8s 3 secondes, <em>v \u2248 30 m\/s<\/em>.<\/p>\n\n\n\n<p>Ces valeurs montrent que la vitesse augmente de fa\u00e7on r\u00e9guli\u00e8re au fil du temps.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"415\" height=\"282\" src=\"https:\/\/chateauegitim.com\/wp-content\/uploads\/2026\/04\/image-10.png\" alt=\"\" class=\"wp-image-10048\" srcset=\"https:\/\/chateauegitim.com\/wp-content\/uploads\/2026\/04\/image-10.png 415w, https:\/\/chateauegitim.com\/wp-content\/uploads\/2026\/04\/image-10-300x204.png 300w, https:\/\/chateauegitim.com\/wp-content\/uploads\/2026\/04\/image-10-18x12.png 18w, https:\/\/chateauegitim.com\/wp-content\/uploads\/2026\/04\/image-10-24x16.png 24w, https:\/\/chateauegitim.com\/wp-content\/uploads\/2026\/04\/image-10-36x24.png 36w, https:\/\/chateauegitim.com\/wp-content\/uploads\/2026\/04\/image-10-48x33.png 48w\" sizes=\"auto, (max-width: 415px) 100vw, 415px\" \/><\/figure>\n\n\n\n<p><\/p>","protected":false},"excerpt":{"rendered":"<p>Quand on laisse tomber un objet d\u2019une certaine hauteur, il chute sous l\u2019action de la [&hellip;]<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[303,197,70,301,206,302,304,300],"class_list":["post-10047","post","type-post","status-publish","format-standard","hentry","category-genel","tag-chute-libre","tag-fizik","tag-fransiz-liseleri","tag-pesanteur","tag-physique","tag-resistance","tag-serbest-dusus","tag-valeur"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v15.5 - 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