{"id":53,"date":"2023-06-26T18:02:50","date_gmt":"2023-06-26T18:02:50","guid":{"rendered":"https:\/\/physigeek.com\/pt\/constante-gravitacional-universal\/"},"modified":"2023-06-26T18:02:50","modified_gmt":"2023-06-26T18:02:50","slug":"constante-gravitacional-universal","status":"publish","type":"post","link":"https:\/\/physigeek.com\/pt\/constante-gravitacional-universal\/","title":{"rendered":"Constante gravitacional universal"},"content":{"rendered":"

Este artigo explica o que \u00e9 a constante gravitacional universal e qual \u00e9 o seu valor. Al\u00e9m disso, voc\u00ea aprender\u00e1 para que serve a constante gravitacional universal e quem a descobriu. <\/p>\n

<\/span> Qual \u00e9 a constante gravitacional universal?<\/span><\/h2>\n

A constante gravitacional universal<\/strong> (G) \u00e9 uma constante f\u00edsica usada para calcular a for\u00e7a de atra\u00e7\u00e3o gravitacional entre dois corpos. O valor da constante gravitacional universal \u00e9 G=6,674\u00b710 -11<\/sup> N\u00b7m 2<\/sup> \/kg 2<\/sup> .<\/p>\n

O s\u00edmbolo da constante gravitacional universal \u00e9 a letra mai\u00fascula G.<\/p>\n

No Sistema Internacional de Unidades (SI), as unidades da constante gravitacional universal s\u00e3o N m 2<\/sup> \/kg 2<\/sup> . Embora no Sistema de Unidades C\u00e9g\u00e9simal a constante gravitacional universal seja expressa em dinas\u00b7cm 2<\/sup> \/g 2<\/sup> . <\/p>\n

<\/span> Qual \u00e9 o valor da constante gravitacional universal?<\/span><\/h2>\n

O valor da constante gravitacional universal \u00e9 igual a G=6,674\u00b710 -11<\/sup> N\u00b7m 2<\/sup> \/kg 2<\/sup> .<\/strong> Por\u00e9m, este valor \u00e9 uma aproxima\u00e7\u00e3o, pois o n\u00famero exato desta constante f\u00edsica n\u00e3o \u00e9 conhecido.<\/p>\n

Na verdade, a constante gravitacional universal \u00e9 uma das constantes f\u00edsicas conhecidas com menos precis\u00e3o. O valor da constante gravitacional universal \u00e9 considerado conhecido com um erro de 1 em 10.000.<\/p>\n

At\u00e9 agora, apenas cinco casas decimais da constante gravitacional universal foram determinadas com certeza, portanto seu valor conhecido mais preciso \u00e9 G=6,67430\u00b10,00015,10 -11<\/sup> N m 2<\/sup> \/kg 2<\/sup> .<\/p>\n

Da mesma forma, o fato de o valor da constante de gravita\u00e7\u00e3o universal ainda n\u00e3o ter sido encontrado com precis\u00e3o dificulta o c\u00e1lculo da massa das estrelas, pois tamb\u00e9m n\u00e3o ser\u00e1 preciso, como a massa da Terra ou do Sol. <\/p>\n

<\/span>Para que \u00e9 usada a constante gravitacional universal?<\/span><\/h2>\n

Principalmente, a constante gravitacional universal \u00e9 usada para calcular a for\u00e7a gravitacional entre dois corpos.<\/strong> Por outras palavras, a constante gravitacional universal permite-nos determinar a for\u00e7a com que dois corpos se atraem.<\/p>\n

Voc\u00ea pode ver a f\u00f3rmula da for\u00e7a gravitacional em nosso site.<\/p>\n

Da mesma forma, a constante gravitacional universal tamb\u00e9m \u00e9 usada para calcular a massa de corpos celestes, como a Terra, a Lua ou o Sol. <\/p>\n

<\/span> Quem descobriu a constante gravitacional universal?<\/span><\/h2>\n

A exist\u00eancia da constante gravitacional universal est\u00e1 impl\u00edcita na publica\u00e7\u00e3o da lei da gravita\u00e7\u00e3o universal de Newton no final do s\u00e9culo XVII. Foi, portanto, o f\u00edsico Isaac Newton quem descobriu a constante gravitacional universal, embora n\u00e3o tenha calculado o seu valor.<\/p>\n

Mais tarde, em 1798, Henry Cavendish conseguiu obter pela primeira vez o valor da constante gravitacional universal, a aproxima\u00e7\u00e3o que obteve foi G=6,6\u00b10,041,10 -11<\/sup> N\u00b7m 2<\/sup> \/kg 2<\/sup> . Cavendish chegou a esse valor experimentalmente.<\/p>\n

Ao longo da hist\u00f3ria, cada vez mais descobertas foram feitas sobre a constante gravitacional universal, tornando o seu valor cada vez mais concreto. At\u00e9 2018, quando um grupo de pesquisa chin\u00eas encontrou o valor mais preciso at\u00e9 o momento da constante gravitacional universal, que \u00e9 G=6,67430\u00b10,00015\u00b710 -11<\/sup> N\u00b7m 2<\/sup> \/kg 2<\/sup> .<\/p>\n","protected":false},"excerpt":{"rendered":"

Este artigo explica o que \u00e9 a constante gravitacional universal e qual \u00e9 o seu valor. Al\u00e9m disso, voc\u00ea aprender\u00e1 para que serve a constante gravitacional universal e quem a descobriu. Qual \u00e9 a constante gravitacional universal? A constante gravitacional universal (G) \u00e9 uma constante f\u00edsica usada para calcular a for\u00e7a de atra\u00e7\u00e3o gravitacional entre …<\/p>\n

Constante gravitacional universal<\/span> Leia mais »<\/a><\/p>\n","protected":false},"author":1,"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":"","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":"","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":"","footnotes":""},"categories":[5],"tags":[],"class_list":["post-53","post","type-post","status-publish","format-standard","hentry","category-dinamico"],"yoast_head":"\n\u25b7 Constante gravitacional universal: o que \u00e9, valor, hist\u00f3ria,...<\/title>\n<meta name=\"description\" content=\"Explicamos o que \u00e9 a constante gravitacional universal, qual \u00e9 o seu valor e a hist\u00f3ria de como a constante gravitacional universal foi obtida.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/physigeek.com\/pt\/constante-gravitacional-universal\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u25b7 Constante gravitacional universal: o que \u00e9, valor, hist\u00f3ria,...\" \/>\n<meta property=\"og:description\" content=\"Explicamos o que \u00e9 a constante gravitacional universal, qual \u00e9 o seu valor e a hist\u00f3ria de como a constante gravitacional universal foi obtida.\" \/>\n<meta property=\"og:url\" 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