{"id":4062,"date":"2018-07-20T03:37:25","date_gmt":"2018-07-20T03:37:25","guid":{"rendered":"http:\/\/fisicaevestibular.com.br\/novo\/?page_id=4062"},"modified":"2024-08-22T13:46:01","modified_gmt":"2024-08-22T13:46:01","slug":"estatica-02-estatica-de-um-corpo-extenso-centro-de-massa-tipos-de-equilibrio","status":"publish","type":"page","link":"https:\/\/fisicaevestibular.com.br\/novo\/formulario\/estatica-02-estatica-de-um-corpo-extenso-centro-de-massa-tipos-de-equilibrio\/","title":{"rendered":"Est\u00e1tica 02 – Est\u00e1tica de um corpo extenso \u2013 Centro de massa \u2013 Tipos de equil\u00edbrio"},"content":{"rendered":"

Formul\u00e1rio completo de F\u00edsica com informa\u00e7\u00f5es \u00fateis <\/b><\/span><\/span><\/span><\/p>\n

(Dicas para vestibulares)<\/b><\/span><\/span><\/span><\/p>\n

Est\u00e1tica 02<\/b><\/span><\/span><\/span><\/p>\n

Est\u00e1tica de um corpo extenso \u2013 Centro de massa \u2013 Tipos de equil\u00edbrio<\/b><\/span><\/span><\/span><\/span><\/span><\/p>\n

Centro de massa<\/span><\/span><\/span><\/p>\n

<\/p>\n

Centro de gravidade<\/b><\/span><\/span><\/span><\/span><\/span><\/p>\n

<\/p>\n

C\u00e1lculo do centro de massa de um corpo ou de um sistema de pontos materiais<\/b><\/span><\/span><\/span><\/p>\n

<\/p>\n

Informa\u00e7\u00f5es \u00fateis <\/b><\/span><\/span><\/span>(dicas para vestibulares)<\/b><\/span><\/span><\/span><\/p>\n

<\/p>\n

Numa\u00a0<\/b><\/span><\/span><\/span>competi\u00e7\u00e3o ol\u00edmpica<\/b><\/span><\/span><\/span>,<\/b><\/span><\/span><\/span> quando um atleta pula, num salto, ele <\/b><\/span><\/span><\/span>movimenta seus bra\u00e7os,<\/b><\/span><\/span><\/span><\/p>\n

<\/p>\n

\u00a0<\/span>pernas e cabe\u00e7a,<\/b><\/span><\/span><\/span> <\/b>alterando a posi\u00e7\u00e3o do centro de massa<\/b><\/span><\/span><\/span> de seu corpo, <\/b><\/span><\/span><\/span>mas o mesmo <\/b><\/span><\/span><\/span>(centro de massa) descreve uma\u00a0<\/b><\/span><\/span><\/span>trajet\u00f3ria<\/b><\/span><\/span><\/span>\u00a0<\/b><\/span><\/span><\/span>parab\u00f3lica em rela\u00e7\u00e3o \u00e0 Terra, <\/b><\/span><\/span><\/span>sujeito ao campo gravitacional.<\/b><\/span><\/span><\/span><\/p>\n

Quando um\u00a0<\/b><\/span><\/span><\/span>corpo<\/b><\/span><\/span><\/span>\u00a0se encontra no\u00a0<\/b><\/span><\/span><\/span>espa\u00e7o sider<\/b><\/span><\/span><\/span>al<\/b><\/span><\/span><\/span>,\u00a0<\/b><\/span><\/span><\/span>longe<\/b><\/span><\/span><\/span>\u00a0da\u00a0<\/b><\/span><\/span><\/span>atra\u00e7\u00e3o gravitacional de qualquer<\/b><\/span><\/span><\/span><\/p>\n

<\/p>\n

planeta<\/b><\/span><\/span><\/span>,<\/b><\/span><\/span><\/span> <\/b>ele\u00a0<\/b><\/span><\/span><\/span>possui centro de massa,<\/b><\/span><\/span><\/span>\u00a0<\/b><\/span><\/span><\/span>mas\u00a0<\/b><\/span><\/span><\/span>n\u00e3o centro gravitacional<\/b><\/span><\/span><\/span>\u00a0(centro de gravidade CG).<\/b><\/span><\/span><\/span><\/p>\n

Tipos de equil\u00edbrio<\/b><\/span><\/span><\/span><\/p>\n

Para se\u00a0<\/b><\/span><\/span><\/span>determinar s<\/b><\/span><\/span><\/span>e um\u00a0<\/b><\/span><\/span><\/span>corpo extenso<\/b><\/span><\/span><\/span>\u00a0est\u00e1 em\u00a0<\/b><\/span><\/span><\/span>equil\u00edbrio,<\/b><\/span><\/span><\/span>\u00a0basta\u00a0<\/b><\/span><\/span><\/span>tir\u00e1-lo ligeiramente da posi\u00e7\u00e3o<\/b><\/span><\/span><\/span>\u00a0<\/b><\/span><\/span><\/span>de equil\u00edbrio<\/b><\/span><\/span><\/span>\u00a0e, em seguida\u00a0<\/b><\/span><\/span><\/span>abandon\u00e1-lo.<\/b><\/span><\/span><\/span><\/p>\n

O\u00a0<\/b><\/span><\/span><\/span>equil\u00edbrio\u00a0<\/b><\/span><\/span><\/span>ser\u00e1\u00a0<\/b><\/span><\/span><\/span>est\u00e1vel<\/b><\/span><\/span><\/span>\u00a0se <\/b><\/span><\/span><\/span>ele\u00a0<\/b><\/span><\/span><\/span>retornar \u00e0 posi\u00e7\u00e3o inicia<\/b><\/span><\/span><\/span>l<\/b><\/span><\/span><\/span>, se ele\u00a0<\/b><\/span><\/span><\/span>tender a se <\/b><\/span><\/span><\/span>afastar da <\/b><\/span><\/span><\/span><\/p>\n

posi\u00e7\u00e3o de<\/b><\/span><\/span><\/span> <\/b>equil\u00edbrio,<\/b><\/span><\/span><\/span> o mesmo ser\u00e1\u00a0<\/b><\/span><\/span><\/span>inst\u00e1vel<\/b><\/span><\/span><\/span>\u00a0<\/b><\/span><\/span><\/span>e, se ele\u00a0<\/b><\/span><\/span><\/span>permanecer na nova posi\u00e7\u00e3o<\/b><\/span><\/span><\/span>, ser\u00e1\u00a0<\/b><\/span><\/span><\/span>indiferente.<\/b><\/span><\/span><\/span><\/p>\n

Informa\u00e7\u00f5es \u00fateis <\/b><\/span><\/span><\/span>(dicas para vestibulares)<\/b><\/span><\/span><\/span><\/p>\n

<\/p>\n

Corpos apoiados<\/b><\/span><\/span><\/span>\u00a0ficam sob a\u00e7\u00e3o de\u00a0<\/b><\/span><\/span><\/span>duas for\u00e7as verticais<\/b><\/span><\/span><\/span>, seu\u00a0<\/b><\/span><\/span><\/span>peso, vertical e para baixo<\/b><\/span><\/span><\/span>\u00a0e a\u00a0<\/b><\/span><\/span><\/span>rea\u00e7\u00e3o normal do apoio, vertical e para cima.<\/b><\/span><\/span><\/span><\/p>\n

Essas\u00a0<\/b><\/span><\/span><\/span>duas for\u00e7as<\/b><\/span><\/span><\/span>\u00a0devem ser\u00a0<\/b><\/span><\/span><\/span>colineares<\/b><\/span><\/span><\/span>\u00a0e, assim a\u00a0<\/b><\/span><\/span><\/span>reta vertical que cont\u00e9m o centro de<\/b><\/span><\/span><\/span><\/p>\n

<\/p>\n

gravidade do corpo deve passar por sua base para que ele n\u00e3o caia.<\/b><\/span><\/span><\/span><\/p>\n

Os\u00a0<\/b><\/span><\/span><\/span>carros de corrida<\/b><\/span><\/span><\/span>\u00a0<\/b><\/span><\/span><\/span>s\u00e3o baixos<\/b><\/span><\/span><\/span>,<\/b><\/span><\/span><\/span> para que seu\u00a0<\/b><\/span><\/span><\/span>centro de gravidade<\/b><\/span><\/span><\/span>\u00a0fique o mais\u00a0<\/b><\/span><\/span><\/span>perto <\/b><\/span><\/span><\/span><\/p>\n

<\/p>\n

poss\u00edvel do solo<\/b><\/span><\/span><\/span>, <\/b><\/span><\/span><\/span>adquirindo, assim<\/b><\/span><\/span><\/span>, <\/b><\/span><\/span><\/span>grande estabilidade.<\/b><\/span><\/span><\/span><\/p>\n

\u00a0<\/span>Nas\u00a0<\/b><\/span><\/span><\/span>figuras abaixo<\/b><\/span><\/span><\/span>\u00a0o\u00a0<\/b><\/span><\/span><\/span>equil\u00edbrio obtido \u00e9 denominado de\u00a0est\u00e1vel<\/b><\/span><\/span><\/span>,<\/b><\/span><\/span><\/span>\u00a0pois o <\/b><\/span><\/span><\/span>centro de <\/b><\/span><\/span><\/span><\/p>\n

<\/p>\n

gravidade\u00a0(CG)<\/b><\/span><\/span><\/span> <\/b>encontra-se abaixo do ponto de sustenta\u00e7\u00e3o ou do apoio.<\/b><\/span><\/span><\/span><\/p>\n

<\/p>\n

<\/p>\n

\u00a0<\/span><\/p>\n

<\/p>\n

<\/p>\n

Exemplo em que o <\/span><\/span><\/span>centro de gravidade \u00e9 deslocado.<\/span><\/span><\/span><\/p>\n

<\/p>\n","protected":false},"excerpt":{"rendered":"

Formul\u00e1rio completo de F\u00edsica com informa\u00e7\u00f5es \u00fateis (Dicas para vestibulares) Est\u00e1tica 02 Est\u00e1tica de um corpo extenso \u2013 Centro de massa \u2013 Tipos de equil\u00edbrio Centro de massa Centro de gravidade C\u00e1lculo do centro de massa de um corpo ou de um sistema de pontos materiais Informa\u00e7\u00f5es \u00fateis (dicas para vestibulares) Numa\u00a0competi\u00e7\u00e3o ol\u00edmpica, quando um atleta pula, num salto, ele<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":3987,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"class_list":["post-4062","page","type-page","status-publish","hentry"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages\/4062","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/comments?post=4062"}],"version-history":[{"count":1,"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages\/4062\/revisions"}],"predecessor-version":[{"id":4063,"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages\/4062\/revisions\/4063"}],"up":[{"embeddable":true,"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages\/3987"}],"wp:attachment":[{"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/media?parent=4062"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}