{"id":44,"date":"2007-05-05T14:00:09","date_gmt":"2007-05-05T12:00:09","guid":{"rendered":"http:\/\/tayeb.fr\/wordpress\/?p=44"},"modified":"2026-08-18T04:27:50","modified_gmt":"2026-08-18T02:27:50","slug":"loeuf-et-la-toupie","status":"publish","type":"post","link":"https:\/\/tayeb.fr\/wordpress\/2007\/05\/loeuf-et-la-toupie\/","title":{"rendered":"L’oeuf et la toupie"},"content":{"rendered":"

On fait tourner l’oeuf en position \u00ab\u00a0couch\u00e9e\u00a0\u00bb et il se redresse tout seul. Voir la vid\u00e9o<\/a>:
\n\"http:\/\/tayeb.fr\/wordpress_uploads\/oeuf_2331.avi\"<\/a>
\nVous pouvez faire la manip vous m\u00eame. Il suffit d\u2019avoir un oeuf dur (le chat n\u2019est pas indispensable).
\nIl est facile de comprendre pourquoi l\u2019\u00e9nergie se minimise lorsque l\u2019oeuf se redresse (si la rotation est assez rapide, l\u2019\u00e9nergie cin\u00e9tique diminue plus que ce que l\u2019\u00e9nergie potentielle de pesanteur augmente).
\nPar contre, la dynamique du mouvement semble assez velue! Voir par exemple ici<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"

On fait tourner l’oeuf en position \u00ab\u00a0couch\u00e9e\u00a0\u00bb et il se redresse tout seul. Voir la vid\u00e9o: Vous pouvez faire la […]<\/p>\n","protected":false},"author":8,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[11,7],"tags":[],"class_list":["post-44","post","type-post","status-publish","format-standard","hentry","category-brica_science","category-discussions-de-cafe"],"jetpack_publicize_connections":[],"jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p4nbll-I","jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/tayeb.fr\/wordpress\/wp-json\/wp\/v2\/posts\/44","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/tayeb.fr\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/tayeb.fr\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/tayeb.fr\/wordpress\/wp-json\/wp\/v2\/users\/8"}],"replies":[{"embeddable":true,"href":"https:\/\/tayeb.fr\/wordpress\/wp-json\/wp\/v2\/comments?post=44"}],"version-history":[{"count":2,"href":"https:\/\/tayeb.fr\/wordpress\/wp-json\/wp\/v2\/posts\/44\/revisions"}],"predecessor-version":[{"id":2271,"href":"https:\/\/tayeb.fr\/wordpress\/wp-json\/wp\/v2\/posts\/44\/revisions\/2271"}],"wp:attachment":[{"href":"https:\/\/tayeb.fr\/wordpress\/wp-json\/wp\/v2\/media?parent=44"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/tayeb.fr\/wordpress\/wp-json\/wp\/v2\/categories?post=44"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/tayeb.fr\/wordpress\/wp-json\/wp\/v2\/tags?post=44"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}