{"id":45787,"date":"2019-10-20T05:02:52","date_gmt":"2019-10-20T04:02:52","guid":{"rendered":"https:\/\/www.thermal-engineering.org\/quest-ce-que-lenergie-potentielle-definition\/"},"modified":"2020-02-26T11:13:23","modified_gmt":"2020-02-26T10:13:23","slug":"quest-ce-que-lenergie-potentielle-definition","status":"publish","type":"post","link":"https:\/\/www.thermal-engineering.org\/fr\/quest-ce-que-lenergie-potentielle-definition\/","title":{"rendered":"Qu&#8217;est-ce que l&#8217;\u00e9nergie potentielle &#8211; D\u00e9finition"},"content":{"rendered":"<div class=\"su-quote su-quote-style-default\">\n<div class=\"su-quote-inner su-clearfix\">Quelle est l&#8217;\u00e9nergie potentielle.\u00a0L&#8217;\u00e9nergie potentielle, U, est d\u00e9finie comme l&#8217;\u00e9nergie stock\u00e9e dans un objet soumis \u00e0 une force conservatrice.\u00a0G\u00e9nie thermique<\/div>\n<\/div>\n<div class=\"su-divider su-divider-style-dotted\"><\/div>\n<div class=\"lgc-column lgc-grid-parent lgc-grid-100 lgc-tablet-grid-100 lgc-mobile-grid-100 lgc-equal-heights lgc-first lgc-last\">\n<div class=\"inside-grid-column\">\n<div class=\"su-spacer\"><\/div>\n<h2>Quelle est l&#8217;\u00e9nergie potentielle<\/h2>\n<p><strong><a href=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/conservartion-of-mechanical-energy-pendulum.png\"><img loading=\"lazy\" class=\"alignright size-full wp-image-15713 lazy-loaded\" src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/conservartion-of-mechanical-energy-pendulum.png\" alt=\"conservation-du-pendule-\u00e9nergie-m\u00e9canique\" width=\"282\" height=\"214\" data-lazy-type=\"image\" data-src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/conservartion-of-mechanical-energy-pendulum.png\" \/><\/a>L&#8217;\u00e9nergie potentielle<\/strong>\u00a0, U, est d\u00e9finie comme l&#8217;\u00a0<strong>\u00e9nergie stock\u00e9e<\/strong>\u00a0dans un objet soumis \u00e0 une force conservatrice.\u00a0Les types courants incluent l&#8217;\u00a0<strong>\u00e9nergie potentielle gravitationnelle<\/strong>\u00a0, l&#8217;\u00a0<strong>\u00e9nergie potentielle \u00e9lastique<\/strong>\u00a0d&#8217;un ressort prolong\u00e9 et l&#8217;\u00a0<strong>\u00e9nergie potentielle \u00e9lectrique<\/strong>\u00a0d&#8217;une charge \u00e9lectrique dans un champ \u00e9lectrique, etc.<\/p>\n<p>Supposons l&#8217;\u00a0\u00a0<strong>\u00e9nergie m\u00e9canique<\/strong>\u00a0\u00a0(E\u00a0<sub>mech<\/sub>\u00a0), qui est l&#8217;\u00e9nergie associ\u00e9e au\u00a0\u00a0<strong>mouvement<\/strong>\u00a0\u00a0et \u00e0 la\u00a0<strong>\u00a0position<\/strong>\u00a0\u00a0d&#8217;un objet g\u00e9n\u00e9ralement dans un champ de force (par exemple un champ gravitationnel).\u00a0<strong>M\u00a0<\/strong><strong>\u00e9nergie \u00e9canique<\/strong>\u00a0\u00a0(et \u00e9galement l&#8217;\u00e9nergie thermique) peuvent \u00eatre s\u00e9par\u00e9s en deux cat\u00e9gories, les\u00a0transitoires et stock\u00e9es.\u00a0L&#8217;\u00e9nergie transitoire est l&#8217;\u00e9nergie en mouvement, c&#8217;est-\u00e0-dire l&#8217;\u00e9nergie transf\u00e9r\u00e9e d&#8217;un endroit \u00e0 un autre.\u00a0L&#8217;\u00e9nergie stock\u00e9e est l&#8217;\u00e9nergie contenue dans une substance ou un objet.\u00a0L&#8217;\u00e9nergie m\u00e9canique transitoire est commun\u00e9ment appel\u00e9e\u00a0\u00a0<strong>travail<\/strong>\u00a0.\u00a0L&#8217;\u00e9nergie m\u00e9canique stock\u00e9e existe sous l&#8217;une des deux formes suivantes:\u00a0\u00a0<strong>cin\u00e9tique<\/strong>\u00a0\u00a0ou\u00a0\u00a0<strong>potentielle<\/strong>\u00a0:<\/p>\n<ul>\n<li><strong>L&#8217; \u00e9nergie potentielle<\/strong>\u00a0.\u00a0L&#8217;\u00e9nergie potentielle, U, est d\u00e9finie comme l&#8217;\u00e9nergie stock\u00e9e dans un objet soumis \u00e0 une force conservatrice.\u00a0Les types courants incluent l&#8217;\u00e9nergie potentielle gravitationnelle d&#8217;un objet qui d\u00e9pend de sa masse et de sa distance au centre de masse d&#8217;un autre objet.<\/li>\n<li><strong>\u00c9nergie cin\u00e9tique<\/strong>\u00a0.\u00a0L&#8217;\u00e9nergie cin\u00e9tique,\u00a0\u00a0<em>K<\/em>\u00a0, est d\u00e9finie comme l&#8217;\u00e9nergie stock\u00e9e dans un objet en raison de son mouvement.\u00a0Cela d\u00e9pend de la vitesse d&#8217;un objet et de la capacit\u00e9 d&#8217;un objet en mouvement \u00e0 travailler sur d&#8217;autres objets lorsqu&#8217;il entre en collision avec eux.<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<div class=\"lgc-column lgc-grid-parent lgc-grid-100 lgc-tablet-grid-100 lgc-mobile-grid-100 lgc-equal-heights lgc-first lgc-last\">\n<div class=\"inside-grid-column\">\n<div class=\"su-spacer\"><\/div>\n<h2>Exemples d&#8217;\u00e9nergie potentielle<\/h2>\n<p><strong>\u00c9nergie potentielle gravitationnelle:<\/strong><\/p>\n<p align=\"center\">En m\u00e9canique classique, l&#8217;\u00e9nergie potentielle gravitationnelle (U) est l&#8217;\u00e9nergie qu&#8217;un objet poss\u00e8de en raison de sa position dans un champ gravitationnel.\u00a0Le potentiel gravitationnel (V; l&#8217;\u00e9nergie gravitationnelle par unit\u00e9 de masse) \u00e0 un emplacement est \u00e9gal au travail (\u00e9nergie transf\u00e9r\u00e9e) par unit\u00e9 de masse qui serait n\u00e9cessaire pour d\u00e9placer l&#8217;objet d&#8217;un emplacement de r\u00e9f\u00e9rence fixe vers l&#8217;emplacement de l&#8217;objet.\u00a0L\u2019utilisation la plus courante de l\u2019\u00e9nergie potentielle gravitationnelle concerne un objet situ\u00e9 pr\u00e8s de la surface de la Terre o\u00f9 l\u2019acc\u00e9l\u00e9ration gravitationnelle peut \u00eatre suppos\u00e9e constante \u00e0 environ 9,8 m \/ s\u00a0<sup>2<\/sup>\u00a0.<\/p>\n<p align=\"center\"><strong>U = mgh<\/strong><\/p>\n<p><strong>\u00c9nergie potentielle \u00e9lastique<\/strong>\u00a0:<\/p>\n<div class=\"lgc-column lgc-grid-parent lgc-grid-100 lgc-tablet-grid-100 lgc-mobile-grid-100 lgc-equal-heights  lgc-first lgc-last\">\n<div class=\"inside-grid-column\">\n<p><span>L&#8217;\u00e9nergie potentielle \u00e9lastique est l&#8217;\u00e9nergie potentielle stock\u00e9e \u00e0 la suite de la d\u00e9formation d&#8217;un objet \u00e9lastique, telle que l&#8217;\u00e9tirement d&#8217;un ressort.\u00a0Elle d\u00e9pend de la constante de ressort k ainsi que de la distance \u00e9tir\u00e9e.<\/span><\/p>\n<p><strong><span>U = 1\/2 kx\u00a0<\/span><sup><span>2<\/span><\/sup><\/strong><\/p>\n<p><strong><span>\u00c9nergie potentielle \u00e9lectrique<\/span><\/strong><span>\u00a0:<\/span><\/p>\n<p><span>L&#8217;\u00e9nergie potentielle \u00e9lectrique est une \u00e9nergie potentielle qui r\u00e9sulte des forces coulombiennes conservatrices et est associ\u00e9e \u00e0 la configuration d&#8217;un ensemble particulier de charges ponctuelles au sein d&#8217;un syst\u00e8me d\u00e9fini.\u00a0Par exemple, si une charge positive Q est fix\u00e9e \u00e0 un certain point dans l&#8217;espace, toute autre charge positive qui s&#8217;en rapproche subira une force r\u00e9pulsive et aura donc une \u00e9nergie potentielle.<\/span><\/p>\n<p><strong><span>U = kQq\u00a0<\/span><span>\/ r<\/span><\/strong><\/p>\n<p><strong>\u00a0<\/strong><\/p>\n<\/div>\n<\/div>\n<div class=\"lgc-column lgc-grid-parent lgc-grid-100 lgc-tablet-grid-100 lgc-mobile-grid-100 lgc-equal-heights  lgc-first lgc-last\">\n<div class=\"inside-grid-column\">\n<div class=\"su-spacer\"><\/div>\n<h2><span>Conservation de l&#8217;\u00e9nergie m\u00e9canique<\/span><\/h2>\n<p><span>Le principe de la\u00a0<\/span><strong><span>conservation de l&#8217;\u00e9nergie m\u00e9canique a d&#8217;abord<\/span><\/strong><span>\u00a0\u00e9t\u00e9 \u00e9nonc\u00e9:<\/span><\/p>\n<p><em><strong><span>L&#8217;\u00e9nergie m\u00e9canique totale<\/span><\/strong><span>\u00a0(d\u00e9finie comme la somme de ses \u00e9nergies potentielles et cin\u00e9tiques) d&#8217;une particule sur laquelle agissent uniquement les forces conservatrices\u00a0<\/span><strong><span>est constante<\/span><\/strong><span>\u00a0.<\/span><\/em><\/p>\n<p><strong><a href=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/conservartion-of-mechanical-energy-example.png\"><img loading=\"lazy\" class=\"alignright size-full wp-image-15711 lazy-loaded\" src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/conservartion-of-mechanical-energy-example.png\" alt=\"exemple de conservation de l'\u00e9nergie m\u00e9canique\" width=\"194\" height=\"172\" data-lazy-type=\"image\" data-src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/conservartion-of-mechanical-energy-example.png\" \/><\/a><\/strong><\/p>\n<p><span>Voir aussi:\u00a0<\/span><a title=\"Conservation de l'\u00e9nergie m\u00e9canique\" href=\"https:\/\/www.nuclear-power.com\/laws-of-conservation\/law-of-conservation-of-energy\/conservation-of-mechanical-energy\/\"><span>Conservation de l&#8217;\u00e9nergie m\u00e9canique<\/span><\/a><\/p>\n<p><strong><span>Un syst\u00e8me isol\u00e9<\/span><\/strong><span>\u00a0est un\u00a0<strong>syst\u00e8me<\/strong>\u00a0dans lequel\u00a0<\/span><strong><span>aucune force externe ne<\/span><\/strong><span>\u00a0provoque de changements d&#8217;\u00e9nergie.\u00a0Si seules\u00a0<\/span><strong><span>les forces conservatrices<\/span><\/strong><span>\u00a0agissent sur un objet et\u00a0<\/span><strong><span>U<\/span><\/strong><span>\u00a0est la\u00a0fonction d&#8217;\u00a0<\/span><strong><span>\u00e9nergie potentielle<\/span><\/strong><span>\u00a0pour la force conservatrice totale, alors<\/span><\/p>\n<p><em><strong><span>E\u00a0<\/span><\/strong><strong><sub><span>mech<\/span><\/sub><\/strong><strong><span>\u00a0= U + K<\/span><\/strong><\/em><\/p>\n<p><strong><span>L&#8217;\u00e9nergie potentielle,\u00a0<\/span><em><span>U<\/span><\/em><\/strong><span>\u00a0, d\u00e9pend de la position d&#8217;un objet soumis \u00e0 une force conservatrice.<\/span><\/p>\n<p><a href=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/potential-energy-equation.png\"><img loading=\"lazy\" class=\"aligncenter size-full wp-image-15710 lazy-loaded\" src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/potential-energy-equation.png\" alt=\"\u00e9quation-\u00e9nergie-potentielle\" width=\"176\" height=\"71\" data-lazy-type=\"image\" data-src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/potential-energy-equation.png\" \/><\/a><\/p>\n<p><span>Elle est d\u00e9finie comme la capacit\u00e9 de l&#8217;objet \u00e0 travailler et est augment\u00e9e lorsque l&#8217;objet est d\u00e9plac\u00e9 dans la direction oppos\u00e9e \u00e0 la direction de la force.<\/span><\/p>\n<p><strong><span>L&#8217;\u00e9nergie potentielle<\/span><\/strong><span>\u00a0associ\u00e9e \u00e0 un syst\u00e8me compos\u00e9 de la Terre et d&#8217;une particule voisine est\u00a0\u00a0<\/span><strong><span>l&#8217;\u00e9nergie potentielle gravitationnelle<\/span><\/strong><span>\u00a0.<\/span><\/p>\n<p><a href=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/gravitational-potential-energy-equation.png\"><img loading=\"lazy\" class=\"aligncenter size-full wp-image-15712 lazy-loaded\" src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/gravitational-potential-energy-equation.png\" alt=\"gravitationnel-potentiel-\u00e9nergie-\u00e9quation\" width=\"256\" height=\"45\" data-lazy-type=\"image\" data-src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/gravitational-potential-energy-equation.png\" \/><\/a><\/p>\n<p><strong><span>L&#8217;\u00e9nergie cin\u00e9tique,\u00a0<\/span><em><span>K<\/span><\/em><\/strong><span>\u00a0, d\u00e9pend de la vitesse d&#8217;un objet et est la capacit\u00e9 d&#8217;un objet en mouvement \u00e0 travailler sur d&#8217;autres objets lorsqu&#8217;il entre en collision avec eux.<\/span><\/p>\n<p><em><strong><span>\u00a0K = \u00bd mv\u00a0<\/span><sup><span>2<\/span><\/sup><\/strong><\/em><\/p>\n<p><span>La d\u00e9finition mentionn\u00e9e ci-dessus (\u00a0<\/span><strong><span>E\u00a0<\/span><\/strong><strong><sub><span>mech<\/span><\/sub><\/strong><strong><span>\u00a0= U + K<\/span><\/strong><span>\u00a0) suppose que le syst\u00e8me est\u00a0<\/span><strong><span>exempt de frottement<\/span><\/strong><span>\u00a0et d&#8217;autres\u00a0<\/span><a title=\"Conservateur - Forces non conservatrices\" href=\"https:\/\/www.nuclear-power.com\/laws-of-conservation\/law-of-conservation-of-energy\/conservative-nonconservative-forces\/\"><strong><span>forces non conservatrices<\/span><\/strong><\/a><span>\u00a0.\u00a0La diff\u00e9rence entre une force conservatrice et une force non conservatrice est que lorsqu&#8217;une force conservatrice d\u00e9place un objet d&#8217;un point \u00e0 un autre, le travail effectu\u00e9 par la force conservatrice est ind\u00e9pendant du chemin.<\/span><\/p>\n<p><span>Dans toute situation r\u00e9elle, des\u00a0<\/span><strong><span>forces de friction<\/span><\/strong><span>\u00a0et d&#8217;autres\u00a0<strong>forces<\/strong>\u00a0non conservatrices sont pr\u00e9sentes, mais dans de nombreux cas, leurs effets sur le syst\u00e8me sont si faibles que le principe de\u00a0<\/span><strong><span>conservation de l&#8217;\u00e9nergie m\u00e9canique<\/span><\/strong><span>\u00a0peut \u00eatre utilis\u00e9 comme une approximation juste.\u00a0Par exemple, la force de friction est une force non conservatrice, car elle agit pour r\u00e9duire l&#8217;\u00e9nergie m\u00e9canique dans un syst\u00e8me.<\/span><\/p>\n<p><span>Notez que les forces non conservatrices ne r\u00e9duisent pas toujours l&#8217;\u00e9nergie m\u00e9canique.\u00a0Une force non conservatrice modifie l&#8217;\u00e9nergie m\u00e9canique, il existe des forces qui augmentent l&#8217;\u00e9nergie m\u00e9canique totale, comme la force fournie par un moteur ou un moteur, est \u00e9galement une force non conservatrice.<\/span><\/p>\n<\/div>\n<\/div>\n<div class=\"lgc-column lgc-grid-parent lgc-grid-100 lgc-tablet-grid-100 lgc-mobile-grid-100 lgc-equal-heights  lgc-first lgc-last\">\n<div class=\"inside-grid-column\">\n<div class=\"su-spacer\"><\/div>\n<h2><span>Bloc glissant sur une pente inclin\u00e9e sans friction<\/span><\/h2>\n<p><span>Le bloc de 1 kg commence \u00e0 une hauteur H (disons 1 m) au-dessus du sol, avec\u00a0<\/span><strong><span>une \u00e9nergie potentielle\u00a0<\/span><\/strong><strong><span>mgH<\/span><\/strong><span>\u00a0et\u00a0<\/span><strong><span>une \u00e9nergie cin\u00e9tique<\/span><\/strong><span>\u00a0\u00e9gale \u00e0 0. Il glisse vers le sol (sans frottement) et arrive sans \u00e9nergie potentielle et \u00e9nergie cin\u00e9tique\u00a0<\/span><strong><span>K = \u00bd mv\u00a0<\/span><sup><span>2<\/span><\/sup><\/strong><span>\u00a0.\u00a0Calculez la vitesse du bloc au sol et son \u00e9nergie cin\u00e9tique.<\/span><\/p>\n<p><strong><em><span>E\u00a0<\/span><\/em><\/strong><strong><em><sub><span>mech<\/span><\/sub><\/em><\/strong><strong><em><span>\u00a0= U + K = const<\/span><\/em><\/strong><\/p>\n<p><strong><em><span>=&gt; \u00bd mv\u00a0<\/span><\/em><\/strong><strong><em><sup><span>2<\/span><\/sup><\/em><\/strong><strong><em><span>\u00a0= mgH<\/span><\/em><\/strong><\/p>\n<p><strong><em><span>=&gt; v = \u221a2gH = 4,43 m \/ s<\/span><\/em><\/strong><\/p>\n<p><strong><em><span>=&gt; K\u00a0<\/span><\/em><\/strong><strong><em><sub><span>2<\/span><\/sub><\/em><\/strong><strong><em><span>\u00a0= \u00bd x 1 kg x (4,43 m \/ s)\u00a0<\/span><\/em><\/strong><strong><em><sup><span>2<\/span><\/sup><\/em><\/strong><strong><em><span>\u00a0= 19,62 kg.m\u00a0<\/span><\/em><\/strong><strong><em><sup><span>2<\/span><\/sup><\/em><\/strong><strong><em><span>\u00a0.s\u00a0<\/span><\/em><\/strong><strong><em><sup><span>-2<\/span><\/sup><\/em><\/strong><strong><em><span>\u00a0= 19,62 J<\/span><\/em><\/strong><\/p>\n<\/div>\n<\/div>\n<div class=\"lgc-column lgc-grid-parent lgc-grid-100 lgc-tablet-grid-100 lgc-mobile-grid-100 lgc-equal-heights  lgc-first lgc-last\">\n<div class=\"inside-grid-column\">\n<div class=\"su-spacer\"><\/div>\n<h2><span>Pendule<\/span><\/h2>\n<p><a href=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/conservartion-of-mechanical-energy-pendulum.png\"><img loading=\"lazy\" class=\"alignright size-full wp-image-15713 lazy-loaded\" src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/conservartion-of-mechanical-energy-pendulum.png\" alt=\"pendule \u00e0 conservation d'\u00e9nergie m\u00e9canique\" width=\"282\" height=\"214\" data-lazy-type=\"image\" data-src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/conservartion-of-mechanical-energy-pendulum.png\" \/><\/a><span>Supposons un\u00a0<\/span><strong><span>pendule<\/span><\/strong><span>\u00a0(boule de masse m suspendue \u00e0 une cha\u00eene de longueur\u00a0<\/span><strong><span>L<\/span><\/strong><span>\u00a0que nous avons tir\u00e9e de sorte que la balle soit \u00e0 une hauteur\u00a0<\/span><strong><span>H &lt;L<\/span><\/strong><span>\u00a0au-dessus de son point le plus bas sur l&#8217;arc de son mouvement de corde tendue. Le pendule est soumis au\u00a0<\/span><strong><span>conservateur force gravitationnelle<\/span><\/strong><span>\u00a0o\u00f9 les forces de friction comme la tra\u00een\u00e9e d&#8217;air et la friction au pivot sont n\u00e9gligeables.<\/span><\/p>\n<p><span>Nous le lib\u00e9rons du repos.\u00a0<\/span><strong><span>\u00c0 quelle vitesse va-t-il au fond?<\/span><\/strong><\/p>\n<p><a href=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/conservartion-of-mechanical-energy-pendulum2.png\"><img loading=\"lazy\" class=\"aligncenter size-full wp-image-15714 lazy-loaded\" src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/conservartion-of-mechanical-energy-pendulum2.png\" alt=\"pendule \u00e0 conservation d'\u00e9nergie m\u00e9canique2\" width=\"322\" height=\"115\" data-lazy-type=\"image\" data-src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/conservartion-of-mechanical-energy-pendulum2.png\" \/><\/a><\/p>\n<p><span>Le pendule atteint la\u00a0<\/span><strong><span>plus grande \u00e9nergie cin\u00e9tique<\/span><\/strong><span>\u00a0et le\u00a0<\/span><strong><span>moins d&#8217;\u00e9nergie potentielle<\/span><\/strong><span>\u00a0lorsqu&#8217;il est en\u00a0<\/span><strong><span>position verticale<\/span><\/strong><span>\u00a0, car il aura la plus grande vitesse et sera le plus proche de la Terre \u00e0 ce point.\u00a0D&#8217;un autre c\u00f4t\u00e9, il aura sa\u00a0<\/span><strong><span>moindre \u00e9nergie cin\u00e9tique<\/span><\/strong><span>\u00a0et sa\u00a0<\/span><strong><span>plus grande \u00e9nergie potentielle<\/span><\/strong><span>\u00a0aux\u00a0<\/span><strong><span>positions extr\u00eames<\/span><\/strong><span>\u00a0de son swing, car il a une vitesse nulle et est le plus \u00e9loign\u00e9 de la Terre en ces points.<\/span><\/p>\n<p><span>Si l&#8217;amplitude est limit\u00e9e \u00e0 de petites oscillations, la p\u00e9riode\u00a0<\/span><em><span>T<\/span><\/em><span>\u00a0d&#8217;un simple pendule, le temps pris pour un cycle complet, est:<\/span><\/p>\n<p><a href=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/period-of-pendulum-conservation-of-energy.png\"><img loading=\"lazy\" class=\"aligncenter size-full wp-image-15715 lazy-loaded\" src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/period-of-pendulum-conservation-of-energy.png\" alt=\"p\u00e9riode-de-pendule-conservation-d'\u00e9nergie\" width=\"252\" height=\"77\" data-lazy-type=\"image\" data-src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/period-of-pendulum-conservation-of-energy.png\" \/><\/a><\/p>\n<p><span>o\u00f9\u00a0<\/span><strong><em><span>L<\/span><\/em><\/strong><span>\u00a0est la longueur du pendule et\u00a0<\/span><strong><em><span>g<\/span><\/em><\/strong><span>\u00a0est l&#8217;acc\u00e9l\u00e9ration locale de la gravit\u00e9.\u00a0Pour les petites balan\u00e7oires, la p\u00e9riode de balancement est approximativement la m\u00eame pour les balan\u00e7oires de tailles diff\u00e9rentes.\u00a0Autrement dit,\u00a0\u00a0<\/span><strong><span>la p\u00e9riode est ind\u00e9pendante de l&#8217;amplitude<\/span><\/strong><span>\u00a0.<\/span><\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<p>&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;.<\/p>\n<p>Cet article est bas\u00e9 sur la traduction automatique de l&#8217;article original en anglais. Pour plus d&#8217;informations, voir l&#8217;article en anglais. Pouvez vous nous aider Si vous souhaitez corriger la traduction, envoyez-la \u00e0 l&#8217;adresse: translations@nuclear-power.com ou remplissez le formulaire de traduction en ligne. Nous appr\u00e9cions votre aide, nous mettrons \u00e0 jour la traduction le plus rapidement possible. Merci<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Quelle est l&#8217;\u00e9nergie potentielle.\u00a0L&#8217;\u00e9nergie potentielle, U, est d\u00e9finie comme l&#8217;\u00e9nergie stock\u00e9e dans un objet soumis \u00e0 une force conservatrice.\u00a0G\u00e9nie thermique Quelle est l&#8217;\u00e9nergie potentielle L&#8217;\u00e9nergie potentielle\u00a0, U, est d\u00e9finie comme l&#8217;\u00a0\u00e9nergie stock\u00e9e\u00a0dans un objet soumis \u00e0 une force conservatrice.\u00a0Les types courants incluent l&#8217;\u00a0\u00e9nergie potentielle gravitationnelle\u00a0, l&#8217;\u00a0\u00e9nergie potentielle \u00e9lastique\u00a0d&#8217;un ressort prolong\u00e9 et l&#8217;\u00a0\u00e9nergie potentielle \u00e9lectrique\u00a0d&#8217;une charge &#8230; <a title=\"Qu&#8217;est-ce que l&#8217;\u00e9nergie potentielle &#8211; D\u00e9finition\" class=\"read-more\" href=\"https:\/\/www.thermal-engineering.org\/fr\/quest-ce-que-lenergie-potentielle-definition\/\" aria-label=\"En savoir plus sur Qu&#8217;est-ce que l&#8217;\u00e9nergie potentielle &#8211; D\u00e9finition\">Lire la suite<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[8],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v15.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Qu&#039;est-ce que l&#039;\u00e9nergie potentielle - D\u00e9finition<\/title>\n<meta name=\"description\" content=\"Quelle est l&#039;\u00e9nergie potentielle. 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