{"id":4889,"date":"2020-01-10T03:14:58","date_gmt":"2020-01-10T03:14:58","guid":{"rendered":"http:\/\/fisicaevestibular.com.br\/novo\/?page_id=4889"},"modified":"2024-06-29T23:40:34","modified_gmt":"2024-06-29T23:40:34","slug":"estatica-2018-2019","status":"publish","type":"page","link":"https:\/\/fisicaevestibular.com.br\/novo\/vestibulares-recentes\/mecanica\/estatica-2018-2019\/","title":{"rendered":"Est\u00e1tica \u2013 2018\/2019"},"content":{"rendered":"

Est\u00e1tica \u2013 2018\/2019<\/b><\/span><\/span><\/span><\/p>\n

01-(ITA \u2013 SP \u2013 019)<\/b><\/span><\/span><\/span><\/em>\u00a0<\/b><\/i><\/span><\/span><\/span><\/span><\/span><\/p>\n

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Uma\u00a0<\/b><\/span><\/span>barra r\u00edgida, homog\u00eanea, fina e de comprimento l,<\/b><\/span><\/span>\u00a0\u00e9 presa a uma\u00a0<\/b><\/span><\/span>corda horizontal sem massa\u00a0<\/b><\/span><\/span>e toca a quina de uma\u00a0<\/b><\/span><\/span>superf\u00edcie horizontal livre de atrito<\/b><\/span><\/span>, fazendo um\u00a0<\/b><\/span><\/span>\u00e2ngulo\u00a0\u0398<\/b><\/span><\/span>\u00a0<\/b><\/span><\/span>como mostra a figura. Considerando\u00a0<\/b><\/span><\/span>a barra em equil\u00edbrio<\/b><\/span><\/span>, assinale a op\u00e7\u00e3o correta para o valor da\u00a0<\/b><\/span><\/span>raz\u00e3o d\/l, em que d \u00e9 a dist\u00e2ncia da quina ao centro de gravidade (CG) da barra<\/b><\/span><\/span>.<\/b><\/span><\/span><\/span><\/span><\/p>\n

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02- (Faculdade de Medicina de Taubat\u00e9 \u2013 FMT \u2013 019)<\/b><\/span><\/span><\/span><\/span><\/span><\/p>\n

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A\u00a0<\/b><\/span><\/span>figura abaixo mostra um objeto, de massa M, em equil\u00edbrio est\u00e1tico, suspenso<\/b><\/span><\/span>\u00a0por\u00a0<\/b><\/span><\/span>cabos cujas extremidades est\u00e3o presas ao teto\u00a0<\/b><\/span><\/span>de uma sala.<\/b><\/span><\/span><\/span><\/span><\/p>\n

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Considere o\u00a0<\/b><\/span><\/span>m\u00f3dulo da acelera\u00e7\u00e3o gravitacional terrestre g = 10m\/s<\/b><\/span><\/span>2<\/b><\/span><\/sup><\/span>\u00a0.\u00a0<\/b><\/span><\/span>Sabendo que o\u00a0<\/b><\/span><\/span>\u00e2ngulo \u03b8 \u00e9 de 30<\/b><\/span><\/span>0<\/b><\/span><\/sup><\/span>\u00a0, e que a tens\u00e3o m\u00e1xima suportada por cada um dos cabos utilizados \u00e9 de 2 kN, qual \u00e9 o valor m\u00e1ximo de M suportado pelo sistema?<\/b><\/span><\/span>\u00a0<\/b><\/span><\/span>Dados: sen(30<\/b><\/span><\/span>0<\/b><\/span><\/sup><\/span>)\u00a0<\/b><\/span><\/span>= 0,5 e\u00a0<\/b><\/span><\/span>cos(30<\/b><\/span><\/span>0<\/b><\/span><\/sup><\/span>)\u00a0<\/b><\/span><\/span>= 0,87<\/b><\/span><\/span><\/span><\/span><\/p>\n

a)\u00a0<\/b><\/span><\/span>0,2 kg\u00a0 <\/b><\/span><\/span>b)\u00a0<\/b><\/span><\/span>10 kg\u00a0 <\/b><\/span><\/span>c)\u00a0<\/b><\/span><\/span>100 kg\u00a0 <\/b><\/span><\/span>d)\u00a0<\/b><\/span><\/span>200 kg\u00a0 <\/b><\/span><\/span>e)\u00a0<\/b><\/span><\/span>2000 kg<\/b><\/span><\/span><\/span><\/span><\/p>\n

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03- (CEDERJ-RJ-2019)<\/b><\/span><\/span><\/span><\/span><\/span><\/p>\n

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Um\u00a0<\/b><\/span><\/span>homem de 80 kg equilibra-se sobre uma plataforma horizontal,<\/b><\/span><\/span>\u00a0de\u00a0<\/b><\/span><\/span>massa desprez\u00edvel, com 8 metros de extens\u00e3o.\u00a0<\/b><\/span><\/span>A\u00a0<\/b><\/span><\/span>plataforma tem suas extremidades apoiadas em duas balan\u00e7as.<\/b><\/span><\/span><\/span><\/span><\/p>\n

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Originalmente,\u00a0<\/b><\/span><\/span>ambas marcam 40 kg em suas leituras.\u00a0<\/b><\/span><\/span>O\u00a0<\/b><\/span><\/span>homem aproxima-se de uma das<\/b><\/span><\/span><\/span><\/span><\/p>\n

extremidades e as leituras nas balan\u00e7as passam a ser de 60 kg e 20 kg.<\/b><\/span><\/span>\u00a0O\u00a0<\/b><\/span><\/span>deslocamento do homem foi de<\/b><\/span><\/span><\/span><\/span><\/p>\n

(A)\u00a0<\/b><\/span><\/span>0,5 m \u00a0<\/b><\/span><\/span>(B)\u00a0<\/b><\/span><\/span>1,0 m\u00a0 <\/b><\/span><\/span>(C)\u00a0<\/b><\/span><\/span>1,5 m\u00a0 <\/b><\/span><\/span>(D)\u00a0<\/b><\/span><\/span>2,0 m<\/b><\/span><\/span><\/span><\/span><\/p>\n

04-\u00a0(ACAFE \u2013\u00a0Associa\u00e7\u00e3o Catarinense das Funda\u00e7\u00f5es Educacionais \u2013Medicina \u2013 2019.<\/b><\/span><\/span><\/span><\/p>\n

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Em uma\u00a0<\/b><\/span><\/span><\/span>loja tr\u00eas pe\u00e7as de roupas est\u00e3o em uma arara\u00a0<\/b><\/span><\/span><\/span>(suporte para pendurar roupas), conforme\u00a0<\/b><\/span><\/span><\/span>mostra a figura.<\/b><\/span><\/span><\/span><\/p>\n

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A\u00a0<\/b><\/span><\/span><\/span>arara \u00e9 constitu\u00edda por tr\u00eas partes, duas verticais (parte A e B) e uma na horizontal (parte C),<\/b><\/span><\/span><\/span>\u00a0<\/b><\/span><\/span><\/span>todas<\/b><\/span><\/span><\/span>\u00a0de\u00a0<\/b><\/span><\/span><\/span>mesma massa (m = 1,00kg).<\/b><\/span><\/span><\/span><\/p>\n

Cada pe\u00e7a de roup<\/b><\/span><\/span><\/span>a e seu\u00a0<\/b><\/span><\/span><\/span>cabide formam um conjunto, ent\u00e3o temos o conjunto 1 (m = 1,00kg)\u00a0<\/b><\/span><\/span><\/span>que\u00a0<\/b><\/span><\/span><\/span>est\u00e1 0,10m da parte A, o conjunto 2 (m = 0,50kg) que est\u00e1 a 0,20m do conjunto 1 e o conjunto 3 (m = 1,50kg) que est\u00e1 a 0,20m da parte B.<\/b><\/span><\/span><\/span><\/p>\n

Considerando todas as partes\u00a0<\/b><\/span><\/span><\/span>da arara\u00a0<\/b><\/span><\/span><\/span>homog\u00eaneas<\/b><\/span><\/span><\/span>\u00a0e o m\u00f3dulo da\u00a0<\/b><\/span><\/span><\/span>acelera\u00e7\u00e3o da gravidade igual a 10 m\/s2 , assinale a alternativa correta que apresenta os m\u00f3dulos das for\u00e7as, em newtons,<\/b><\/span><\/span><\/span>\u00a0que a\u00a0<\/b><\/span><\/span><\/span>parte C aplica sobre a parte A e B,<\/b><\/span><\/span><\/span>\u00a0respectivamente.<\/b><\/span><\/span><\/span><\/p>\n

A)<\/b><\/span><\/span><\/span>\u00a0 20,5 e 19,5
\n<\/b><\/span><\/span><\/span>B)\u00a0<\/b><\/span><\/span><\/span>20,0 e 20,0
\n<\/b><\/span><\/span><\/span>C)<\/b><\/span><\/span><\/span>\u00a024,5 e 15,5
\n<\/b><\/span><\/span><\/span>D)\u00a0<\/b><\/span><\/span><\/span>29,5 e 10,5<\/b><\/span><\/span><\/span><\/p>\n

05-(UNICAMP-SP-018)<\/b><\/span><\/span><\/span><\/p>\n

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A\u00a0<\/b><\/span><\/span><\/span>figura abaixo ilustra uma alavanca\u00a0<\/b><\/span><\/span><\/span>que\u00a0<\/b><\/span><\/span><\/span>gira\u00a0<\/b><\/span><\/span><\/span>em torno do\u00a0<\/b><\/span><\/span><\/span>ponto O.<\/b><\/span><\/span><\/span><\/p>\n

Dois tri\u00e2ngulos,\u00a0<\/b><\/span><\/span><\/span>do\u00a0<\/b><\/span><\/span><\/span>mesmo material e de mesma espessura,\u00a0<\/b><\/span><\/span><\/span>est\u00e3o\u00a0<\/b><\/span><\/span><\/span>presos por fios<\/b><\/span><\/span><\/span>\u00a0de\u00a0<\/b><\/span><\/span><\/span>massa desprez\u00edvel nos extremos da alavanca.<\/b><\/span><\/span><\/span><\/p>\n

Um\u00a0<\/b><\/span><\/span><\/span>tri\u00e2ngulo \u00e9 equil\u00e1tero;\u00a0<\/b><\/span><\/span><\/span>o\u00a0<\/b><\/span><\/span><\/span>outro \u00e9 ret\u00e2ngulo e is\u00f3sceles<\/b><\/span><\/span><\/span>, e sua\u00a0<\/b><\/span><\/span><\/span>hipotenusa\u00a0<\/b><\/span><\/span><\/span>tem o\u00a0<\/b><\/span><\/span><\/span>mesmo comprimento que os lados do tri\u00e2ngulo equil\u00e1tero.<\/b><\/span><\/span><\/span><\/p>\n

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Note que,\u00a0<\/b><\/span><\/span><\/span>neste caso,\u00a0<\/b><\/span><\/span><\/span>o\u00a0<\/b><\/span><\/span><\/span>peso dos objetos \u00e9 proporcional \u00e0 sua \u00e1rea.<\/b><\/span><\/span><\/span><\/p>\n

Conclui-se\u00a0<\/b><\/span><\/span><\/span>que, na\u00a0<\/b><\/span><\/span><\/span>condi\u00e7\u00e3o de equil\u00edbrio da alavanca,<\/b><\/span><\/span><\/span>\u00a0a\u00a0<\/b><\/span><\/span><\/span>raz\u00e3o das dist\u00e2ncias, i\/e,<\/b><\/span><\/span><\/span>\u00a0\u00e9\u00a0<\/b><\/span><\/span><\/span>igual\u00a0<\/b><\/span><\/span><\/span>a<\/b><\/span><\/span><\/span><\/p>\n

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06-(UNICAMP-SP-018)<\/b><\/span><\/span><\/span><\/p>\n

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Em\u00a0<\/b><\/span><\/span><\/span>junho de 2017\u00a0<\/b><\/span><\/span><\/span>uma\u00a0<\/b><\/span><\/span><\/span>intensa onda de calor atingiu os EUA<\/b><\/span><\/span><\/span>, acarretando uma s\u00e9rie de<\/b><\/span><\/span><\/span><\/p>\n

<\/p>\n

cancelamentos de voos do aeroporto de Phoenix no Arizona.<\/b><\/span><\/span><\/span><\/p>\n

A\u00a0<\/b><\/span><\/span><\/span>raz\u00e3o<\/b><\/span><\/span><\/span>\u00a0\u00e9 que o\u00a0<\/b><\/span><\/span><\/span>ar atmosf\u00e9rico se torna muito rarefeito\u00a0<\/b><\/span><\/span><\/span>quando a\u00a0<\/b><\/span><\/span><\/span>temperatura sobe muito<\/b><\/span><\/span><\/span>, o que\u00a0<\/b><\/span><\/span><\/span>diminui a for\u00e7a de sustenta\u00e7\u00e3o da aeronave em voo.<\/b><\/span><\/span><\/span><\/p>\n

Essa for\u00e7a, vertical de baixo para cima,\u00a0<\/b><\/span><\/span><\/span>est\u00e1\u00a0<\/b><\/span><\/span><\/span>associada \u00e0 diferen\u00e7a de press\u00e3o \u2206P\u00a0<\/b><\/span><\/span><\/span>entre as\u00a0<\/b><\/span><\/span><\/span>partes inferior e superior do avi\u00e3o.<\/b><\/span><\/span><\/span><\/p>\n

Considere\u00a0<\/b><\/span><\/span><\/span>um avi\u00e3o de massa total m = 3 10<\/b><\/span><\/span><\/span>5<\/b><\/span><\/span><\/sup><\/span>\u00a0kg\u00a0<\/b><\/span><\/span><\/span>em\u00a0<\/b><\/span><\/span><\/span>voo horizontal.<\/b><\/span><\/span><\/span><\/p>\n

Sendo a\u00a0<\/b><\/span><\/span><\/span>\u00e1rea efetiva de sustenta\u00e7\u00e3o do avi\u00e3o A = 500 m<\/b><\/span><\/span><\/span>2<\/b><\/span><\/span><\/sup><\/span>, na\u00a0<\/b><\/span><\/span><\/span>situa\u00e7\u00e3o de voo horizontal \u2206P\u00a0<\/b><\/span><\/span><\/span>vale<\/b><\/span><\/span><\/span><\/p>\n

(g= 10 m\/s<\/b><\/span><\/span><\/span>2<\/b><\/span><\/span><\/sup><\/span>).<\/b><\/span><\/span><\/span><\/p>\n

a)\u00a0<\/b><\/span><\/span><\/span>5.10<\/b><\/span><\/span><\/span>3<\/b><\/span><\/span><\/sup><\/span>\u00a0N\/m<\/b><\/span><\/span><\/span>2<\/b><\/span><\/span><\/sup><\/span>.<\/b><\/span><\/span><\/span><\/p>\n

b)\u00a0<\/b><\/span><\/span><\/span>6.10<\/b><\/span><\/span><\/span>3<\/b><\/span><\/span><\/sup><\/span>\u00a0N\/m<\/b><\/span><\/span><\/span>2<\/b><\/span><\/span><\/sup><\/span>.\u00a0<\/b><\/span><\/span><\/span><\/p>\n

c)\u00a0<\/b><\/span><\/span><\/span>1,5.10<\/b><\/span><\/span><\/span>6<\/b><\/span><\/span><\/sup><\/span>\u00a0N\/m<\/b><\/span><\/span><\/span>2<\/b><\/span><\/span><\/sup><\/span>.\u00a0<\/b><\/span><\/span><\/span><\/p>\n

d)\u00a0<\/b><\/span><\/span><\/span>1,5.10<\/b><\/span><\/span><\/span>8<\/b><\/span><\/span><\/sup><\/span>\u00a0N\/m<\/b><\/span><\/span><\/span>2<\/b><\/span><\/span><\/sup><\/span>.<\/b><\/span><\/span><\/span><\/p>\n

07- (EsPCEx- AMAN \u2013 2017\/18)<\/b><\/span><\/span><\/span><\/p>\n

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Para\u00a0<\/b><\/span><\/span><\/span>evitar o escorregamento da haste,\u00a0<\/b><\/span><\/span><\/span>um\u00a0<\/b><\/span><\/span><\/span>cabo horizontal ideal\u00a0<\/b><\/span><\/span><\/span>encontra-se\u00a0<\/b><\/span><\/span><\/span>fixo \u00e0 extremidade\u00a0<\/b><\/span><\/span><\/span>da\u00a0<\/b><\/span><\/span><\/span>barra no ponto B<\/b><\/span><\/span><\/span>\u00a0e a\u00a0<\/b><\/span><\/span><\/span>outra extremidade do cabo, fixa \u00e0 parede vertical.<\/b><\/span><\/span><\/span><\/p>\n

Desprezando<\/b><\/span><\/span><\/span>\u00a0todas as\u00a0<\/b><\/span><\/span><\/span>for\u00e7as de atrito\u00a0<\/b><\/span><\/span><\/span>e considerando que a\u00a0<\/b><\/span><\/span><\/span>haste encontra-se em equil\u00edbrio est\u00e1tico,\u00a0<\/b><\/span><\/span><\/span>a\u00a0<\/b><\/span><\/span><\/span>for\u00e7a de tra\u00e7\u00e3o no cabo \u00e9 igual a<\/b><\/span><\/span><\/span><\/p>\n

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08-(COL\u00c9GIO NAVAL \u2013 2017\/18)<\/b><\/span><\/span><\/span><\/p>\n

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A\u00a0<\/b><\/span><\/span><\/span>figura abaixo<\/b><\/span><\/span><\/span>\u00a0representa uma\u00a0<\/b><\/span><\/span><\/span>grua (tamb\u00e9m chamada de guindaste e, nos navios, pau de carga),\u00a0<\/b><\/span><\/span><\/span>que \u00e9 um\u00a0<\/b><\/span><\/span><\/span>equipamento utilizado para a eleva\u00e7\u00e3o\u00a0<\/b><\/span><\/span><\/span>e a\u00a0<\/b><\/span><\/span><\/span>movimenta\u00e7\u00e3o de cargas e materiais pesados.\u00a0<\/b><\/span><\/span><\/span>Seu\u00a0<\/b><\/span><\/span><\/span>funcionamento \u00e9 semelhante\u00a0<\/b><\/span><\/span><\/span>a uma\u00a0<\/b><\/span><\/span><\/span>m\u00e1quina simples\u00a0<\/b><\/span><\/span><\/span>que\u00a0<\/b><\/span><\/span><\/span>cria<\/b><\/span><\/span><\/span>\u00a0<\/b><\/span><\/span><\/span>vantagem mec\u00e2nica para mover cargas al\u00e9m da capacidade humana.<\/b><\/span><\/span><\/span><\/p>\n

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Considerando<\/b><\/span><\/span><\/span>\u00a0que o\u00a0<\/b><\/span><\/span><\/span>contrapeso da grua\u00a0<\/b><\/span><\/span><\/span>mostrada na figura acima tenha uma\u00a0<\/b><\/span><\/span><\/span>massa de 15 toneladas,\u00a0<\/b><\/span><\/span><\/span>pode-se\u00a0<\/b><\/span><\/span><\/span>afirmar que a carga m\u00e1xima, em kg,\u00a0<\/b><\/span><\/span><\/span>que\u00a0<\/b><\/span><\/span><\/span>poder\u00e1 ser erguida\u00a0<\/b><\/span><\/span><\/span>por ela nas\u00a0<\/b><\/span><\/span><\/span>posi\u00e7\u00f5es 1, 2 e 3, respectivamente,\u00a0<\/b><\/span><\/span><\/span>\u00e9 de<\/b><\/span><\/span><\/span><\/p>\n

a)\u00a0<\/b><\/span><\/span><\/span>12 000; 8 000; 6 000<\/b><\/span><\/span><\/span><\/p>\n

b)\u00a0<\/b><\/span><\/span><\/span>12 000; 6 500: 5 000<\/b><\/span><\/span><\/span><\/p>\n

c)\u00a0<\/b><\/span><\/span><\/span>12 000; 7 500; 6 000<\/b><\/span><\/span><\/span><\/p>\n

d)\u00a0<\/b><\/span><\/span><\/span>10 000; 8 500; 7 000<\/b><\/span><\/span><\/span><\/p>\n

e)\u00a0<\/b><\/span><\/span><\/span>10 000; 7 500; 6 000<\/b><\/span><\/span><\/span><\/p>\n

09- Universidade Estadual de Ci\u00eancias da Sa\u00fade de Alagoas (UNCISAL-018)<\/b><\/span><\/span><\/span><\/p>\n

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O\u00a0<\/b><\/span><\/span><\/span>bra\u00e7o humano<\/b><\/span><\/span><\/span>\u00a0pode ser\u00a0<\/b><\/span><\/span><\/span>comparado a uma alavanca ao segurar um bloco\u00a0<\/b><\/span><\/span><\/span>com o\u00a0<\/b><\/span><\/span><\/span>cotovelo apoiado sobre uma superf\u00edcie horizontal,<\/b><\/span><\/span><\/span>\u00a0como indicado\u00a0<\/b><\/span><\/span><\/span>pelas figuras esquem\u00e1ticas a seguir. Considere \u201cP\u201d o m\u00f3dulo do peso\u00a0<\/b><\/span><\/span><\/span>do\u00a0<\/b><\/span><\/span><\/span>bloco\u00a0<\/b><\/span><\/span><\/span>que a\u00a0<\/b><\/span><\/span><\/span>m\u00e3o est\u00e1 segurando;<\/b><\/span><\/span><\/span>\u00a0<\/b><\/span><\/span><\/span>\u201cC\u201d o m\u00f3dulo da for\u00e7a\u00a0<\/b><\/span><\/span><\/span>de\u00a0<\/b><\/span><\/span><\/span>contato que o bloco exerce sobre a m\u00e3o; \u201cPo\u201d\u00a0<\/b><\/span><\/span><\/span>o\u00a0<\/b><\/span><\/span><\/span>m\u00f3dulo do peso do bra\u00e7o; \u201cF\u201d o m\u00f3dulo\u00a0<\/b><\/span><\/span><\/span>da\u00a0<\/b><\/span><\/span><\/span>for\u00e7a muscular necess\u00e1ria para erguer o objeto at\u00e9 a posi\u00e7\u00e3o em que o bra\u00e7o forma um \u00e2ngulo \u201c\u201d com\u00a0<\/b><\/span><\/span><\/span>a\u00a0<\/b><\/span><\/span><\/span>horizontal;<\/b><\/span><\/span><\/span>\u00a0<\/b><\/span><\/span><\/span>\u201cL\u201d a dist\u00e2ncia entre o ponto de aplica\u00e7\u00e3o da for\u00e7a de contato e o ponto de apoio \u201cO\u201d\u00a0<\/b><\/span><\/span><\/span>do\u00a0<\/b><\/span><\/span><\/span>cotovelo sobre a superf\u00edcie;\u00a0<\/b><\/span><\/span><\/span>e\u00a0<\/b><\/span><\/span><\/span>\u201c\u2113 \u201d a dist\u00e2ncia entre o ponto de aplica\u00e7\u00e3o da for\u00e7a muscular<\/b><\/span><\/span><\/span>\u00a0e o\u00a0<\/b><\/span><\/span><\/span>ponto\u00a0<\/b><\/span><\/span><\/span>de\u00a0<\/b><\/span><\/span><\/span>apoio \u201cO\u201d do cotovelo sobre a superf\u00edcie.<\/b><\/span><\/span><\/span><\/p>\n

\"Est\u00e1tica\"<\/p>\n

Com\u00a0<\/b><\/span><\/span><\/span>base nas informa\u00e7\u00f5es apresentadas, assinale<\/b><\/span><\/span><\/span>\u00a0a\u00a0<\/b><\/span><\/span><\/span>alternativa correta.<\/b><\/span><\/span><\/span><\/p>\n

(A)\u00a0<\/b><\/span><\/span><\/span>O peso \u201cP\u201d do bloco e a for\u00e7a de contato \u201cC\u201d formam um par a\u00e7\u00e3o-rea\u00e7\u00e3o.<\/b><\/span><\/span><\/span><\/p>\n

(B)\u00a0<\/b><\/span><\/span><\/span>A rea\u00e7\u00e3o do peso \u201cP\u201d est\u00e1 sendo aplicada na Terra e a rea\u00e7\u00e3o da for\u00e7a de contato \u201cC\u201d que o bloco exerce sobre a m\u00e3o est\u00e1 sendo aplicada no bloco.<\/b><\/span><\/span><\/span><\/p>\n

(C)\u00a0<\/b><\/span><\/span><\/span>O m\u00f3dulo do momento da for\u00e7a de contato \u201cC\u201d em rela\u00e7\u00e3o ao ponto de apoio \u201cO\u201d \u00e9 MC\u00a0= CL.<\/b><\/span><\/span><\/span><\/p>\n

(D)\u00a0<\/b><\/span><\/span><\/span>O m\u00f3dulo do momento da for\u00e7a de contato \u201cC\u201d em rela\u00e7\u00e3o ao ponto de apoio \u201cO\u201d \u00e9 MC\u00a0= CLsen.\u00a0<\/b><\/span><\/span><\/span><\/p>\n

(E)\u00a0<\/b><\/span><\/span><\/span>Na condi\u00e7\u00e3o de equil\u00edbrio, tem-se que F =\u00a0x(C + Po)cos<\/b><\/span><\/span><\/span><\/p>\n

 <\/p>\n

Confira a resolu\u00e7\u00e3o comentada<\/a><\/h3>\n

 <\/p>\n

Clique aqui para ver sobre o tema!<\/a><\/p>\n

Confira as v\u00eddeo aulas!<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

Est\u00e1tica \u2013 2018\/2019 01-(ITA \u2013 SP \u2013 019)\u00a0 Uma\u00a0barra r\u00edgida, homog\u00eanea, fina e de comprimento l,\u00a0\u00e9 presa a uma\u00a0corda horizontal sem massa\u00a0e toca a quina de uma\u00a0superf\u00edcie horizontal livre de atrito, fazendo um\u00a0\u00e2ngulo\u00a0\u0398\u00a0como mostra a figura. Considerando\u00a0a barra em equil\u00edbrio, assinale a op\u00e7\u00e3o correta para o valor da\u00a0raz\u00e3o d\/l, em que d \u00e9 a dist\u00e2ncia da quina ao centro de<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":3123,"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-4889","page","type-page","status-publish","hentry"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages\/4889","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=4889"}],"version-history":[{"count":4,"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages\/4889\/revisions"}],"predecessor-version":[{"id":9882,"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages\/4889\/revisions\/9882"}],"up":[{"embeddable":true,"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages\/3123"}],"wp:attachment":[{"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/media?parent=4889"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}