{"id":3733,"date":"2026-02-05T11:47:00","date_gmt":"2026-02-05T10:47:00","guid":{"rendered":"https:\/\/www.collegedelouest.ch\/wordpress\/?p=3733"},"modified":"2026-03-12T21:34:27","modified_gmt":"2026-03-12T20:34:27","slug":"dehors-la-gravite","status":"publish","type":"post","link":"https:\/\/www.collegedelouest.ch\/wordpress\/2026\/02\/05\/dehors-la-gravite\/","title":{"rendered":"Dehors \u00ab La gravit\u00e9 \u00bb"},"content":{"rendered":"\n<h1 class=\"wp-block-heading\">Dehors \u00ab La gravit\u00e9 \u00bb<\/h1>\n\n\n\n<ul id=\"block-07c6d08a-9eb4-424e-af69-fc8800e159ec\" class=\"wp-block-list\">\n<li>Date : 20 janvier 2026<\/li>\n\n\n\n<li>Lieu : Muzoo<\/li>\n\n\n\n<li>Nombre d&rsquo;\u00e9l\u00e8ves : 19<\/li>\n\n\n\n<li>Niveau : quatri\u00e8me Harmos<\/li>\n\n\n\n<li>Temps : couvert, froid et neige<\/li>\n\n\n\n<li>Temps de travail : env. une heure<\/li>\n\n\n\n<li>Num\u00e9ro de la s\u00e9ance du document de r\u00e9f\u00e9rence : <\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"block-d7b594cf-d619-4535-abb6-fd826da8964f\">Objectifs<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">S&rsquo;interroger sur la gravit\u00e9.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Les objets tombent. L&rsquo;observation a \u00e9t\u00e9 la premi\u00e8re \u00e9tape du questionnement. Tombent-ils tous de la m\u00eame mani\u00e8re ? Quelles sont les diff\u00e9rences ?<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"block-aad91833-8ff9-4738-8228-3339c6eeb761\">Pr\u00e9liminaire<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Ce fut l&rsquo;occasion de replacer le \u00e9l\u00e8ves dans un contexte totalement diff\u00e9rent de celui de la sortie du jour. Replacer, car l&rsquo;extrait lu, du livre de la cabane magique sur la Lune, \u00e9tait d\u00e9j\u00e0 connu de tous. Mais si les mouvements en faible pesanteur avaient \u00e9t\u00e9 bien per\u00e7us, l&rsquo;origine de la diff\u00e9rence avec ceux r\u00e9alis\u00e9s sur Terre, n&rsquo;\u00e9tait pas comprise. La lecture donna donc l&rsquo;occasion de mimer sur Terre des mouvements sur la Lune, ce qui donna une amusante chor\u00e9graphie au ralenti, pour questionner les enfants sur la raison de ceux-ci. Les mots attraction et force apparurent alors, sans que leur liaison avec la Lune elle-m\u00eame ne soit per\u00e7ue.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"768\" src=\"https:\/\/www.collegedelouest.ch\/wordpress\/wp-content\/uploads\/2026\/02\/IMG_20260120_135221-1024x768.jpg\" alt=\"\" class=\"wp-image-3740\" srcset=\"https:\/\/www.collegedelouest.ch\/wordpress\/wp-content\/uploads\/2026\/02\/IMG_20260120_135221-1024x768.jpg 1024w, https:\/\/www.collegedelouest.ch\/wordpress\/wp-content\/uploads\/2026\/02\/IMG_20260120_135221-300x225.jpg 300w, https:\/\/www.collegedelouest.ch\/wordpress\/wp-content\/uploads\/2026\/02\/IMG_20260120_135221-768x576.jpg 768w, https:\/\/www.collegedelouest.ch\/wordpress\/wp-content\/uploads\/2026\/02\/IMG_20260120_135221-1536x1152.jpg 1536w, https:\/\/www.collegedelouest.ch\/wordpress\/wp-content\/uploads\/2026\/02\/IMG_20260120_135221-690x518.jpg 690w, https:\/\/www.collegedelouest.ch\/wordpress\/wp-content\/uploads\/2026\/02\/IMG_20260120_135221-980x735.jpg 980w, https:\/\/www.collegedelouest.ch\/wordpress\/wp-content\/uploads\/2026\/02\/IMG_20260120_135221.jpg 1920w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Le pr\u00e9liminaire fut tr\u00e8s int\u00e9ressant, car questionner une image mentale acquise pr\u00e9c\u00e9demment sans plus d&rsquo;explications, et une \u00e9tape de la d\u00e9marche scientifique.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"block-b4b14bdb-108a-45f5-881b-6a2b50716655\">Travaux pratiques<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">L&rsquo;exp\u00e9rimentation fut ensuite \u00e0 l&rsquo;honneur. Il s&rsquo;agissait pr\u00e9voir comment vont tomber des objets et de l&rsquo;exprimer par \u00e9crit. Puis de tester comment ils tombent en r\u00e9alit\u00e9 et d&rsquo;en rendre compte. Deux objets avaient d\u00e9j\u00e0 \u00e9t\u00e9 test\u00e9s en classe : une gomme et une balle. Sur le chemin des tables, \u00e0 l&rsquo;int\u00e9rieur du Muzoo, les \u00e9l\u00e8ves avaient pu trouver chacun une plume d&rsquo;oiseau. Trois autres objets restaient \u00e0 trouver pour leurs exp\u00e9rimentations.<\/p>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-default is-cropped wp-block-gallery-1 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"768\" height=\"1024\" data-id=\"3744\" src=\"https:\/\/www.collegedelouest.ch\/wordpress\/wp-content\/uploads\/2026\/02\/IMG_20260120_144343-768x1024.jpg\" alt=\"\" class=\"wp-image-3744\" srcset=\"https:\/\/www.collegedelouest.ch\/wordpress\/wp-content\/uploads\/2026\/02\/IMG_20260120_144343-768x1024.jpg 768w, https:\/\/www.collegedelouest.ch\/wordpress\/wp-content\/uploads\/2026\/02\/IMG_20260120_144343-225x300.jpg 225w, https:\/\/www.collegedelouest.ch\/wordpress\/wp-content\/uploads\/2026\/02\/IMG_20260120_144343-1152x1536.jpg 1152w, https:\/\/www.collegedelouest.ch\/wordpress\/wp-content\/uploads\/2026\/02\/IMG_20260120_144343-690x920.jpg 690w, https:\/\/www.collegedelouest.ch\/wordpress\/wp-content\/uploads\/2026\/02\/IMG_20260120_144343-980x1307.jpg 980w, https:\/\/www.collegedelouest.ch\/wordpress\/wp-content\/uploads\/2026\/02\/IMG_20260120_144343.jpg 1440w\" sizes=\"auto, (max-width: 768px) 100vw, 768px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"768\" height=\"1024\" data-id=\"3743\" src=\"https:\/\/www.collegedelouest.ch\/wordpress\/wp-content\/uploads\/2026\/02\/IMG_20260120_144336-768x1024.jpg\" alt=\"\" class=\"wp-image-3743\" srcset=\"https:\/\/www.collegedelouest.ch\/wordpress\/wp-content\/uploads\/2026\/02\/IMG_20260120_144336-768x1024.jpg 768w, https:\/\/www.collegedelouest.ch\/wordpress\/wp-content\/uploads\/2026\/02\/IMG_20260120_144336-225x300.jpg 225w, https:\/\/www.collegedelouest.ch\/wordpress\/wp-content\/uploads\/2026\/02\/IMG_20260120_144336-1152x1536.jpg 1152w, https:\/\/www.collegedelouest.ch\/wordpress\/wp-content\/uploads\/2026\/02\/IMG_20260120_144336-690x920.jpg 690w, https:\/\/www.collegedelouest.ch\/wordpress\/wp-content\/uploads\/2026\/02\/IMG_20260120_144336-980x1307.jpg 980w, https:\/\/www.collegedelouest.ch\/wordpress\/wp-content\/uploads\/2026\/02\/IMG_20260120_144336.jpg 1440w\" sizes=\"auto, (max-width: 768px) 100vw, 768px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"768\" data-id=\"3742\" src=\"https:\/\/www.collegedelouest.ch\/wordpress\/wp-content\/uploads\/2026\/02\/IMG_20260120_144209-1024x768.jpg\" alt=\"\" class=\"wp-image-3742\" srcset=\"https:\/\/www.collegedelouest.ch\/wordpress\/wp-content\/uploads\/2026\/02\/IMG_20260120_144209-1024x768.jpg 1024w, https:\/\/www.collegedelouest.ch\/wordpress\/wp-content\/uploads\/2026\/02\/IMG_20260120_144209-300x225.jpg 300w, https:\/\/www.collegedelouest.ch\/wordpress\/wp-content\/uploads\/2026\/02\/IMG_20260120_144209-768x576.jpg 768w, https:\/\/www.collegedelouest.ch\/wordpress\/wp-content\/uploads\/2026\/02\/IMG_20260120_144209-1536x1152.jpg 1536w, https:\/\/www.collegedelouest.ch\/wordpress\/wp-content\/uploads\/2026\/02\/IMG_20260120_144209-690x518.jpg 690w, https:\/\/www.collegedelouest.ch\/wordpress\/wp-content\/uploads\/2026\/02\/IMG_20260120_144209-980x735.jpg 980w, https:\/\/www.collegedelouest.ch\/wordpress\/wp-content\/uploads\/2026\/02\/IMG_20260120_144209.jpg 1920w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"768\" data-id=\"3745\" src=\"https:\/\/www.collegedelouest.ch\/wordpress\/wp-content\/uploads\/2026\/02\/IMG_20260120_144355-1024x768.jpg\" alt=\"\" class=\"wp-image-3745\" srcset=\"https:\/\/www.collegedelouest.ch\/wordpress\/wp-content\/uploads\/2026\/02\/IMG_20260120_144355-1024x768.jpg 1024w, https:\/\/www.collegedelouest.ch\/wordpress\/wp-content\/uploads\/2026\/02\/IMG_20260120_144355-300x225.jpg 300w, https:\/\/www.collegedelouest.ch\/wordpress\/wp-content\/uploads\/2026\/02\/IMG_20260120_144355-768x576.jpg 768w, https:\/\/www.collegedelouest.ch\/wordpress\/wp-content\/uploads\/2026\/02\/IMG_20260120_144355-1536x1152.jpg 1536w, https:\/\/www.collegedelouest.ch\/wordpress\/wp-content\/uploads\/2026\/02\/IMG_20260120_144355-690x518.jpg 690w, https:\/\/www.collegedelouest.ch\/wordpress\/wp-content\/uploads\/2026\/02\/IMG_20260120_144355-980x735.jpg 980w, https:\/\/www.collegedelouest.ch\/wordpress\/wp-content\/uploads\/2026\/02\/IMG_20260120_144355.jpg 1920w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"768\" data-id=\"3741\" src=\"https:\/\/www.collegedelouest.ch\/wordpress\/wp-content\/uploads\/2026\/02\/IMG_20260120_144204-1024x768.jpg\" alt=\"\" class=\"wp-image-3741\" srcset=\"https:\/\/www.collegedelouest.ch\/wordpress\/wp-content\/uploads\/2026\/02\/IMG_20260120_144204-1024x768.jpg 1024w, https:\/\/www.collegedelouest.ch\/wordpress\/wp-content\/uploads\/2026\/02\/IMG_20260120_144204-300x225.jpg 300w, https:\/\/www.collegedelouest.ch\/wordpress\/wp-content\/uploads\/2026\/02\/IMG_20260120_144204-768x576.jpg 768w, https:\/\/www.collegedelouest.ch\/wordpress\/wp-content\/uploads\/2026\/02\/IMG_20260120_144204-1536x1152.jpg 1536w, https:\/\/www.collegedelouest.ch\/wordpress\/wp-content\/uploads\/2026\/02\/IMG_20260120_144204-690x518.jpg 690w, https:\/\/www.collegedelouest.ch\/wordpress\/wp-content\/uploads\/2026\/02\/IMG_20260120_144204-980x735.jpg 980w, https:\/\/www.collegedelouest.ch\/wordpress\/wp-content\/uploads\/2026\/02\/IMG_20260120_144204.jpg 1920w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n<\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">R\u00e9sultats<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">On peut voir ci-dessous quelques exemples de r\u00e9sultats.<\/p>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-default is-cropped wp-block-gallery-2 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"768\" height=\"1024\" data-id=\"3755\" src=\"https:\/\/www.collegedelouest.ch\/wordpress\/wp-content\/uploads\/2026\/02\/IMG_20260120_161142-768x1024.jpg\" alt=\"\" class=\"wp-image-3755\" srcset=\"https:\/\/www.collegedelouest.ch\/wordpress\/wp-content\/uploads\/2026\/02\/IMG_20260120_161142-768x1024.jpg 768w, https:\/\/www.collegedelouest.ch\/wordpress\/wp-content\/uploads\/2026\/02\/IMG_20260120_161142-225x300.jpg 225w, https:\/\/www.collegedelouest.ch\/wordpress\/wp-content\/uploads\/2026\/02\/IMG_20260120_161142-1152x1536.jpg 1152w, https:\/\/www.collegedelouest.ch\/wordpress\/wp-content\/uploads\/2026\/02\/IMG_20260120_161142-690x920.jpg 690w, https:\/\/www.collegedelouest.ch\/wordpress\/wp-content\/uploads\/2026\/02\/IMG_20260120_161142-980x1307.jpg 980w, https:\/\/www.collegedelouest.ch\/wordpress\/wp-content\/uploads\/2026\/02\/IMG_20260120_161142.jpg 1440w\" sizes=\"auto, (max-width: 768px) 100vw, 768px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"768\" height=\"1024\" data-id=\"3754\" src=\"https:\/\/www.collegedelouest.ch\/wordpress\/wp-content\/uploads\/2026\/02\/IMG_20260120_161129-768x1024.jpg\" alt=\"\" class=\"wp-image-3754\" srcset=\"https:\/\/www.collegedelouest.ch\/wordpress\/wp-content\/uploads\/2026\/02\/IMG_20260120_161129-768x1024.jpg 768w, https:\/\/www.collegedelouest.ch\/wordpress\/wp-content\/uploads\/2026\/02\/IMG_20260120_161129-225x300.jpg 225w, https:\/\/www.collegedelouest.ch\/wordpress\/wp-content\/uploads\/2026\/02\/IMG_20260120_161129-1152x1536.jpg 1152w, https:\/\/www.collegedelouest.ch\/wordpress\/wp-content\/uploads\/2026\/02\/IMG_20260120_161129-690x920.jpg 690w, https:\/\/www.collegedelouest.ch\/wordpress\/wp-content\/uploads\/2026\/02\/IMG_20260120_161129-980x1307.jpg 980w, https:\/\/www.collegedelouest.ch\/wordpress\/wp-content\/uploads\/2026\/02\/IMG_20260120_161129.jpg 1440w\" sizes=\"auto, (max-width: 768px) 100vw, 768px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"768\" height=\"1024\" data-id=\"3753\" src=\"https:\/\/www.collegedelouest.ch\/wordpress\/wp-content\/uploads\/2026\/02\/IMG_20260120_161102-768x1024.jpg\" alt=\"\" class=\"wp-image-3753\" srcset=\"https:\/\/www.collegedelouest.ch\/wordpress\/wp-content\/uploads\/2026\/02\/IMG_20260120_161102-768x1024.jpg 768w, https:\/\/www.collegedelouest.ch\/wordpress\/wp-content\/uploads\/2026\/02\/IMG_20260120_161102-225x300.jpg 225w, https:\/\/www.collegedelouest.ch\/wordpress\/wp-content\/uploads\/2026\/02\/IMG_20260120_161102-1152x1536.jpg 1152w, https:\/\/www.collegedelouest.ch\/wordpress\/wp-content\/uploads\/2026\/02\/IMG_20260120_161102-690x920.jpg 690w, https:\/\/www.collegedelouest.ch\/wordpress\/wp-content\/uploads\/2026\/02\/IMG_20260120_161102-980x1307.jpg 980w, https:\/\/www.collegedelouest.ch\/wordpress\/wp-content\/uploads\/2026\/02\/IMG_20260120_161102.jpg 1440w\" sizes=\"auto, (max-width: 768px) 100vw, 768px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"768\" height=\"1024\" data-id=\"3752\" src=\"https:\/\/www.collegedelouest.ch\/wordpress\/wp-content\/uploads\/2026\/02\/IMG_20260120_161026-768x1024.jpg\" alt=\"\" class=\"wp-image-3752\" srcset=\"https:\/\/www.collegedelouest.ch\/wordpress\/wp-content\/uploads\/2026\/02\/IMG_20260120_161026-768x1024.jpg 768w, https:\/\/www.collegedelouest.ch\/wordpress\/wp-content\/uploads\/2026\/02\/IMG_20260120_161026-225x300.jpg 225w, https:\/\/www.collegedelouest.ch\/wordpress\/wp-content\/uploads\/2026\/02\/IMG_20260120_161026-1152x1536.jpg 1152w, https:\/\/www.collegedelouest.ch\/wordpress\/wp-content\/uploads\/2026\/02\/IMG_20260120_161026-690x920.jpg 690w, https:\/\/www.collegedelouest.ch\/wordpress\/wp-content\/uploads\/2026\/02\/IMG_20260120_161026-980x1307.jpg 980w, https:\/\/www.collegedelouest.ch\/wordpress\/wp-content\/uploads\/2026\/02\/IMG_20260120_161026.jpg 1440w\" sizes=\"auto, (max-width: 768px) 100vw, 768px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"768\" height=\"1024\" data-id=\"3751\" src=\"https:\/\/www.collegedelouest.ch\/wordpress\/wp-content\/uploads\/2026\/02\/IMG_20260120_160955-768x1024.jpg\" alt=\"\" class=\"wp-image-3751\" srcset=\"https:\/\/www.collegedelouest.ch\/wordpress\/wp-content\/uploads\/2026\/02\/IMG_20260120_160955-768x1024.jpg 768w, https:\/\/www.collegedelouest.ch\/wordpress\/wp-content\/uploads\/2026\/02\/IMG_20260120_160955-225x300.jpg 225w, https:\/\/www.collegedelouest.ch\/wordpress\/wp-content\/uploads\/2026\/02\/IMG_20260120_160955-1152x1536.jpg 1152w, https:\/\/www.collegedelouest.ch\/wordpress\/wp-content\/uploads\/2026\/02\/IMG_20260120_160955-690x920.jpg 690w, https:\/\/www.collegedelouest.ch\/wordpress\/wp-content\/uploads\/2026\/02\/IMG_20260120_160955-980x1307.jpg 980w, https:\/\/www.collegedelouest.ch\/wordpress\/wp-content\/uploads\/2026\/02\/IMG_20260120_160955.jpg 1440w\" sizes=\"auto, (max-width: 768px) 100vw, 768px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"768\" height=\"1024\" data-id=\"3750\" src=\"https:\/\/www.collegedelouest.ch\/wordpress\/wp-content\/uploads\/2026\/02\/IMG_20260120_160932-768x1024.jpg\" alt=\"\" class=\"wp-image-3750\" srcset=\"https:\/\/www.collegedelouest.ch\/wordpress\/wp-content\/uploads\/2026\/02\/IMG_20260120_160932-768x1024.jpg 768w, https:\/\/www.collegedelouest.ch\/wordpress\/wp-content\/uploads\/2026\/02\/IMG_20260120_160932-225x300.jpg 225w, https:\/\/www.collegedelouest.ch\/wordpress\/wp-content\/uploads\/2026\/02\/IMG_20260120_160932-1152x1536.jpg 1152w, https:\/\/www.collegedelouest.ch\/wordpress\/wp-content\/uploads\/2026\/02\/IMG_20260120_160932-690x920.jpg 690w, https:\/\/www.collegedelouest.ch\/wordpress\/wp-content\/uploads\/2026\/02\/IMG_20260120_160932-980x1307.jpg 980w, https:\/\/www.collegedelouest.ch\/wordpress\/wp-content\/uploads\/2026\/02\/IMG_20260120_160932.jpg 1440w\" sizes=\"auto, (max-width: 768px) 100vw, 768px\" \/><\/figure>\n<\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Il faut relever que parfois il y a confusion entre ce qui va se passer pendant la chute et ce qui se passe au moment du contact au sol. Mais de mani\u00e8re g\u00e9n\u00e9rale, la diff\u00e9rence entre les objets soumis \u00e0 peu de frottements (gomme, neige, pierre, &#8230;) et les plumes ou les feuilles, est bien relev\u00e9e. Il faut remarquer aussi que certains n&rsquo;utilisent pas seulement des mots, mais font de petites phrases.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Finalement<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Un discussion finale s&rsquo;est faite ensuite au sujet du pourquoi ces objets tombent diff\u00e9remment. Tr\u00e8s rapidement, le poids a \u00e9t\u00e9 incrimin\u00e9. Selon eux, la Terre tire plus sur les objets lourds. Relevez que c&rsquo;est le cas, le poids \u00e9tant li\u00e9 \u00e0 la quantit\u00e9 de mati\u00e8re, c&rsquo;est \u00e0 dire la masse (poids = masse \u00b7 acc\u00e9l\u00e9ration= m\u00b7g). Mais la pr\u00e9sence de l&rsquo;air et de son frottement pour expliquer les diff\u00e9rences de chute ne fut pas relevant pour eux. Par contre, comme on le verra dans le compte rendu de la prochaine sortie, l&rsquo;air a une action sur le vol des plumes. On pourrait voir dans la pr\u00e9sence et l&rsquo;absence d&rsquo;action dans ces deux cas, un embryon de th\u00e9orie aristot\u00e9licienne : il est naturel que les corps tombent, mais il faut les forcer \u00e0 s&rsquo;\u00e9lever. Le fait que la Terre doit forcer (exercer une force sur) les objets \u00e0 acc\u00e9l\u00e9rer vers le bas n&rsquo;est pas compris. Mais, comme pour les \u00e9lever une force est naturellement n\u00e9cessaire, l&rsquo;expression de force existe chez eux avec le sens aristot\u00e9licien de l&rsquo;action.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Et ce sens bloque la compr\u00e9hension du fait que le poids d\u00e9pend de la masse de la Terre (via la constante gravitationnelle g). Repris par la suite, cet aspect, c&rsquo;est-\u00e0-dire le fait que les corps tombent plus vite sur la Terre que sur la lune (on s&rsquo;entend : on une acc\u00e9l\u00e9ration diff\u00e9rente) en raison du fait que la Lune est plus petite que la Terre (en d&rsquo;autres termes : \u00e0 une masse plus petite) ne passe \u00e9videmment pas.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">On verra \u00e0 la prochaine sortie, portant pr\u00e9cis\u00e9ment sur la pr\u00e9sence d&rsquo;air, que le changement newtonien de la compr\u00e9hension de la chute frein\u00e9e par l&rsquo;air, a n\u00e9cessit\u00e9 de voir le film de la chute d&rsquo;une plume dans le vide lunaire &#8230;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Dehors \u00ab La gravit\u00e9 \u00bb Objectifs S&rsquo;interroger sur la gravit\u00e9. Les objets tombent. L&rsquo;observation a \u00e9t\u00e9 la premi\u00e8re \u00e9tape du questionnement. Tombent-ils tous de la m\u00eame mani\u00e8re ? Quelles sont les diff\u00e9rences ? Pr\u00e9liminaire Ce fut l&rsquo;occasion de replacer le \u00e9l\u00e8ves dans un contexte totalement diff\u00e9rent de celui de la sortie du jour. Replacer, car [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":3746,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"image","meta":{"footnotes":""},"categories":[32,47,46],"tags":[],"class_list":["post-3733","post","type-post","status-publish","format-image","has-post-thumbnail","hentry","category-classe-celine-guyot-et-audrey-thiebaud-2021-22","category-dehors","category-travaux-202526","post_format-post-format-image"],"_links":{"self":[{"href":"https:\/\/www.collegedelouest.ch\/wordpress\/wp-json\/wp\/v2\/posts\/3733","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.collegedelouest.ch\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.collegedelouest.ch\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.collegedelouest.ch\/wordpress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.collegedelouest.ch\/wordpress\/wp-json\/wp\/v2\/comments?post=3733"}],"version-history":[{"count":8,"href":"https:\/\/www.collegedelouest.ch\/wordpress\/wp-json\/wp\/v2\/posts\/3733\/revisions"}],"predecessor-version":[{"id":3756,"href":"https:\/\/www.collegedelouest.ch\/wordpress\/wp-json\/wp\/v2\/posts\/3733\/revisions\/3756"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.collegedelouest.ch\/wordpress\/wp-json\/wp\/v2\/media\/3746"}],"wp:attachment":[{"href":"https:\/\/www.collegedelouest.ch\/wordpress\/wp-json\/wp\/v2\/media?parent=3733"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.collegedelouest.ch\/wordpress\/wp-json\/wp\/v2\/categories?post=3733"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.collegedelouest.ch\/wordpress\/wp-json\/wp\/v2\/tags?post=3733"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}