{"id":1216,"date":"2023-03-17T09:31:22","date_gmt":"2023-03-17T07:31:22","guid":{"rendered":"https:\/\/cedra.academy\/?p=1216"},"modified":"2023-10-20T09:39:39","modified_gmt":"2023-10-20T06:39:39","slug":"forta-de-gravitatie","status":"publish","type":"post","link":"https:\/\/cedra.academy\/?p=1216","title":{"rendered":"For\u021ba de gravita\u021bie"},"content":{"rendered":"\n<p>Gravita\u021bia este o for\u021b\u0103 fundamental\u0103 a naturii care atrage obiectele cu mas\u0103 sau mas\u0103 gravita\u021bional\u0103 unul c\u0103tre cel\u0103lalt. Acesta este unul dintre cele patru principale tipuri de for\u021be fundamentale din univers, celelalte trei fiind for\u021ba electromagnetic\u0103, for\u021ba tare \u0219i for\u021ba slab\u0103. Gravita\u021bia este responsabil\u0103 pentru fenomene precum atrac\u021bia P\u0103m\u00e2ntului asupra obiectelor, mi\u0219carea planetelor \u00een jurul soarelui \u0219i multe alte aspecte ale cosmosului.<\/p>\n\n\n\n<p>Principalele caracteristici ale gravita\u021biei sunt urm\u0103toarele:<\/p>\n\n\n\n<ol>\n<li>Atrac\u021bie universal\u0103: Gravita\u021bia este o for\u021b\u0103 universal\u0103, ceea ce \u00eenseamn\u0103 c\u0103 toate obiectele cu mas\u0103 se atrag reciproc. Cu toate acestea, for\u021ba de atrac\u021bie este mai puternic\u0103 pentru obiecte cu mas\u0103 mai mare.<\/li>\n\n\n\n<li>Legea gravita\u021biei universale: Legea gravita\u021biei universale a fost formulat\u0103 de c\u0103tre Isaac Newton \u00een secolul al XVII-lea. Aceast\u0103 lege afirm\u0103 c\u0103 oricare dou\u0103 obiecte cu mas\u0103 m \u0219i M exercit\u0103 o for\u021b\u0103 de atrac\u021bie una asupra celeilalte, iar aceast\u0103 for\u021b\u0103 este direct propor\u021bional\u0103 cu produsul maselor lor \u0219i invers propor\u021bional\u0103 cu p\u0103tratul distan\u021bei dintre ele. Formula matematic\u0103 care descrie aceast\u0103 for\u021b\u0103 este: F = G * (m * M) \/ r^2 Unde:<\/li>\n<\/ol>\n\n\n\n<ul>\n<li>F reprezint\u0103 for\u021ba gravita\u021bional\u0103,<\/li>\n\n\n\n<li>G este constanta gravita\u021bional\u0103,<\/li>\n\n\n\n<li>m \u0219i M sunt masele obiectelor \u0219i<\/li>\n\n\n\n<li>r este distan\u021ba dintre obiecte.<\/li>\n<\/ul>\n\n\n\n<ol>\n<li>Accelerare datorat\u0103 gravita\u021biei: Obiectele aflate \u00een apropierea unui corp masiv, precum P\u0103m\u00e2ntul, sunt supuse unei accelera\u021bii constante c\u0103tre centrul acestui corp. Aceast\u0103 accelera\u021bie este cunoscut\u0103 sub numele de accelera\u021bie gravita\u021bional\u0103 \u0219i este aproximativ de 9,81 m\/s^2 la suprafa\u021ba P\u0103m\u00e2ntului.<\/li>\n<\/ol>\n\n\n\n<p>Gravita\u021bia are un impact semnificativ asupra mi\u0219c\u0103rii obiectelor \u00een spa\u021biu, asupra form\u0103rii \u0219i evolu\u021biei sistemelor solare, galaxiilor \u0219i a structurilor cosmice. De asemenea, a fost fundamental\u0103 \u00een dezvoltarea teoriei relativit\u0103\u021bii generale a lui Albert Einstein, care a oferit o \u00een\u021belegere mai profund\u0103 a modului \u00een care gravita\u021bia afecteaz\u0103 spa\u021biu \u0219i timpul.<\/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\"><\/figure>\n\n\n\n<div class=\"wp-block-file\"><a id=\"wp-block-file--media-563b39c8-23fd-49a4-a87a-cf86cb813706\" href=\"https:\/\/cedra.academy\/wp-content\/uploads\/2023\/10\/Tipuri-de-forte.ppt\">Tipuri-de-forte<\/a><a href=\"https:\/\/cedra.academy\/wp-content\/uploads\/2023\/10\/Tipuri-de-forte.ppt\" class=\"wp-block-file__button wp-element-button\" download aria-describedby=\"wp-block-file--media-563b39c8-23fd-49a4-a87a-cf86cb813706\">Descarc\u0103<\/a><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Gravita\u021bia este o for\u021b\u0103 fundamental\u0103 a naturii care atrage obiectele cu mas\u0103 sau mas\u0103 gravita\u021bional\u0103 unul c\u0103tre cel\u0103lalt. Acesta este unul dintre cele patru principale tipuri de for\u021be fundamentale din [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":1217,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[18,10],"tags":[],"_links":{"self":[{"href":"https:\/\/cedra.academy\/index.php?rest_route=\/wp\/v2\/posts\/1216"}],"collection":[{"href":"https:\/\/cedra.academy\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/cedra.academy\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/cedra.academy\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/cedra.academy\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1216"}],"version-history":[{"count":1,"href":"https:\/\/cedra.academy\/index.php?rest_route=\/wp\/v2\/posts\/1216\/revisions"}],"predecessor-version":[{"id":1220,"href":"https:\/\/cedra.academy\/index.php?rest_route=\/wp\/v2\/posts\/1216\/revisions\/1220"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cedra.academy\/index.php?rest_route=\/wp\/v2\/media\/1217"}],"wp:attachment":[{"href":"https:\/\/cedra.academy\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1216"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cedra.academy\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1216"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cedra.academy\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1216"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}