{"id":777,"date":"2015-05-13T15:29:18","date_gmt":"2015-05-13T15:29:18","guid":{"rendered":"http:\/\/fisicaevestibular.com.br\/novo\/?page_id=777"},"modified":"2024-09-02T17:35:19","modified_gmt":"2024-09-02T17:35:19","slug":"exercicios-resolvidos-da-ucpel-2015","status":"publish","type":"page","link":"https:\/\/fisicaevestibular.com.br\/novo\/universidades-2015\/exercicios-resolvidos-da-ucpel-2015\/","title":{"rendered":"Exerc\u00edcios Resolvidos da UCPel 2015"},"content":{"rendered":"

 <\/p>\n

\"\"<\/p>\n

A<\/b><\/span><\/span>\u00a0<\/b><\/span><\/span><\/span>Universidade Cat\u00f3lica de Pelotas<\/span><\/span><\/span>\u00a0<\/b><\/span><\/span><\/span>(UCPel) tem sua estrutura de 52 mil metros quadrados dividida basicamente em quatro grandes centros.<\/b><\/span><\/span>\u00a0<\/b><\/span><\/span><\/span>
\n<\/b><\/span><\/span>No Centro de Ci\u00eancias da Vida e da Sa\u00fade est\u00e3o<\/span><\/span><\/span>\u00a0<\/b><\/span><\/span><\/span>os cursos de Ci\u00eancias Biol\u00f3gicas, Ecologia, Enfermagem, Farm\u00e1cia, Fisioterapia, <\/b><\/span><\/span>Medicina<\/b><\/span><\/span><\/span> e Psicologia.<\/b><\/span><\/span>\u00a0<\/b><\/span><\/span><\/span>
\n<\/b><\/span><\/span>O Centro de Ci\u00eancias Jur\u00eddicas, Econ\u00f4micas e Sociais engloba<\/span><\/span><\/span>\u00a0<\/b><\/span><\/span><\/span>as gradua\u00e7\u00f5es de Administra\u00e7\u00e3o, Ci\u00eancias Cont\u00e1beis, Economia, Direito, Servi\u00e7o Social e Tecnologia em Gest\u00e3o Hospitalar.<\/b><\/span><\/span>\u00a0<\/b><\/span><\/span><\/span>
\n<\/b><\/span><\/span>O Centro de Educa\u00e7\u00e3o e Comunica\u00e7\u00e3o abrange<\/span><\/span><\/span>\u00a0<\/b><\/span><\/span><\/span>os cursos de Comunica\u00e7\u00e3o Social – Jornalismo, Comunica\u00e7\u00e3o Social – Publicidade e Propaganda, Letras, Matem\u00e1tica, Pedagogia e os cursos superiores de Tecnologia em Design de Moda, Gest\u00e3o de Turismo e Produ\u00e7\u00e3o Fonogr\u00e1fica.<\/b><\/span><\/span>\u00a0<\/b><\/span><\/span><\/span>
\nJ\u00e1<\/b><\/span><\/span>\u00a0<\/b><\/span><\/span><\/span>o Centro Polit\u00e9cnico re\u00fane<\/span><\/span><\/span>\u00a0<\/b><\/span><\/span><\/span>os cursos de Arquitetura e Urbanismo, Ci\u00eancia da Computa\u00e7\u00e3o, Engenharia Civil, Engenharia da Computa\u00e7\u00e3o, Engenharia El\u00e9trica, Engenharia Eletr\u00f4nica, Qu\u00edmica – com \u00eanfase na \u00e1rea Ambiental, Tecnologia em An\u00e1lise e Desenvolvimento de Sistemas e Tecnologia em Sistemas para Internet.<\/b><\/span><\/span><\/p>\n

01-(UCPel-RS-015)<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

Um <\/b><\/span><\/span><\/span>objeto O<\/b><\/span><\/span><\/span>1<\/b><\/span><\/span><\/sub><\/span> de <\/b><\/span><\/span><\/span>massa <\/b><\/span><\/span><\/span>m<\/b><\/i><\/span><\/span><\/span>1<\/b><\/span><\/span><\/sub><\/span> e <\/b><\/span><\/span><\/span>carga el\u00e9trica Q<\/b><\/span><\/span><\/span>1<\/b><\/span><\/span><\/sub><\/span> \u00e9 <\/b><\/span><\/span><\/span>atra\u00eddo<\/b><\/span><\/span><\/span> por outro <\/b><\/span><\/span><\/span>objeto O<\/b><\/span><\/span><\/span>2<\/b><\/span><\/span><\/sub><\/span> de <\/b><\/span><\/span><\/span>massa <\/b><\/span><\/span><\/span>m<\/b><\/i><\/span><\/span><\/span>2<\/b><\/span><\/span><\/sub><\/span>, carga Q<\/b><\/span><\/span><\/span>2<\/b><\/span><\/span><\/sub><\/span>.<\/b><\/span><\/span><\/span><\/p>\n

Se <\/b><\/span><\/span><\/span>Q<\/b><\/span><\/span><\/span>1<\/b><\/span><\/span><\/sub><\/span> = 2Q<\/b><\/span><\/span><\/span>2<\/b><\/span><\/span><\/sub><\/span> e <\/b><\/span><\/span><\/span>m<\/b><\/i><\/span><\/span><\/span>1<\/b><\/span><\/span><\/sub><\/span> =(3\/4)<\/b><\/span><\/span><\/span>m<\/b><\/i><\/span><\/span><\/span>2<\/b><\/span><\/span><\/sub><\/span>, assinale a <\/b><\/span><\/span><\/span>op\u00e7\u00e3o<\/b><\/span><\/span><\/span> que apresenta a <\/b><\/span><\/span><\/span>raz\u00e3o a<\/b><\/span><\/span><\/span>1<\/b><\/span><\/span><\/sub><\/span>\/a<\/b><\/span><\/span><\/span>2<\/b><\/span><\/span><\/sub><\/span> entre as acelera\u00e7\u00f5es dos<\/b><\/span><\/span><\/span><\/p>\n

objetos <\/b><\/span><\/span><\/span>O<\/b><\/span><\/span><\/span>1<\/b><\/span><\/span><\/sub><\/span> e O<\/b><\/span><\/span><\/span>2<\/b><\/span><\/span><\/sub><\/span>.<\/b><\/span><\/span><\/span><\/p>\n

(A)<\/b><\/span><\/span><\/span> 1\/4 <\/b><\/span><\/span><\/span>(B)<\/b><\/span><\/span><\/span> 3\/4 <\/b><\/span><\/span><\/span>(C)<\/b><\/span><\/span><\/span> 1\/2 <\/b><\/span><\/span><\/span>(D)<\/b><\/span><\/span><\/span> 2 <\/b><\/span><\/span><\/span>(E)<\/b><\/span><\/span><\/span> 4\/3<\/b><\/span><\/span><\/span><\/p>\n

02-(UCPel-RS-015)<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

Assinale a <\/b><\/span><\/span><\/span>op\u00e7\u00e3o correta<\/b><\/span><\/span><\/span> em rela\u00e7\u00e3o ao <\/b><\/span><\/span><\/span>comportamento<\/b><\/span><\/span><\/span> de um <\/b><\/span><\/span><\/span>sistema termodin\u00e2mico<\/b><\/span><\/span><\/span> que<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

recebe uma energia equivalente a 1000 kcal sem que haja mudan\u00e7as em seu volume.<\/b><\/span><\/span><\/span><\/p>\n

(A)<\/b><\/span><\/span><\/span> Ocorre um aumento de press\u00e3o, pois a energia interna n\u00e3o varia devido \u00e0 n\u00e3o varia\u00e7\u00e3o do<\/b><\/span><\/span><\/span><\/p>\n

volume do sistema.<\/b><\/span><\/span><\/span><\/p>\n

(B)<\/b><\/span><\/span><\/span> Esse sistema tem sua energia interna aumentada, mas sua temperatura diminui, o que provoca a<\/b><\/span><\/span><\/span><\/p>\n

realiza\u00e7\u00e3o de trabalho.<\/b><\/span><\/span><\/span><\/p>\n

(C)<\/b><\/span><\/span><\/span> A temperatura aumenta, mas a energia interna diminui, fazendo com que o sistema realize<\/b><\/span><\/span><\/span><\/p>\n

trabalho sobre o meio.<\/b><\/span><\/span><\/span><\/p>\n

(D)<\/b><\/span><\/span><\/span> O sistema n\u00e3o realiza trabalho e a energia foi fornecida ao sistema sob a forma de calor.<\/b><\/span><\/span><\/span><\/p>\n

(E)<\/b><\/span><\/span><\/span> O sistema n\u00e3o realiza trabalho e a energia entra no sistema devido ao trabalho exercido pelo<\/b><\/span><\/span><\/span><\/p>\n

meio, por isso o volume n\u00e3o varia.<\/b><\/span><\/span><\/span><\/p>\n

03-(UCPel-RS-015)<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

Um <\/b><\/span><\/span><\/span>p\u00eandulo simples<\/b><\/span><\/span><\/span> oscila <\/b><\/span><\/span><\/span>inicialmente<\/b><\/span><\/span><\/span> com um per\u00edodo igual a <\/b><\/span><\/span><\/span>T<\/b><\/span><\/span><\/span>i<\/b><\/span><\/span><\/sub><\/span> <\/b>. Se <\/b><\/span><\/span><\/span>reduzirmos o<\/b><\/span><\/span><\/span> <\/b><\/p>\n

\"\"<\/p>\n

compriment<\/b><\/span><\/span><\/span>o desse p\u00eandulo em <\/b><\/span><\/span><\/span>3\/4 de seu valor inicial<\/b><\/span><\/span><\/span>, qual ser\u00e1 a <\/b><\/span><\/span><\/span>raz\u00e3o entre o per\u00edodo inicial T<\/b><\/span><\/span><\/span>i<\/b><\/span><\/span><\/sub><\/span> e o per\u00edodo final T<\/b><\/span><\/span><\/span>f<\/b><\/span><\/span><\/sub><\/span>? <\/b><\/span><\/span><\/span><\/p>\n

De que valor <\/b><\/span><\/span><\/span>podemos modificar sua massa para que o per\u00edodo volte a ter o valor original T<\/b><\/span><\/span><\/span>i<\/b><\/span><\/span><\/sub><\/span> ?<\/b><\/span><\/span><\/span><\/p>\n

Lembre-se de que, para o <\/b><\/span><\/span><\/span>p\u00eandulo simples,<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

(A)<\/b><\/span><\/span><\/span> T<\/b><\/span><\/span><\/span>i<\/b><\/span><\/span><\/sub><\/span> \/ T<\/b><\/span><\/span><\/span>f <\/b><\/span><\/span><\/sub><\/span>= 2, a massa n\u00e3o interfere no per\u00edodo.<\/b><\/span><\/span><\/span><\/p>\n

(B)<\/b><\/span><\/span><\/span> T<\/b><\/span><\/span><\/span>i<\/b><\/span><\/span><\/sub><\/span> \/ T<\/b><\/span><\/span><\/span>f<\/b><\/span><\/span><\/sub><\/span> = 4\/3 , a massa precisa ser aumentada em 3\/4.<\/b><\/span><\/span><\/span><\/p>\n

(C)<\/b><\/span><\/span><\/span> T<\/b><\/span><\/span><\/span>i<\/b><\/span><\/span><\/sub><\/span> \/ T<\/b><\/span><\/span><\/span>f<\/b><\/span><\/span><\/sub><\/span> = 3\/4, a massa precisa ser aumentada em 1\/4.<\/b><\/span><\/span><\/span><\/p>\n

(D)<\/b><\/span><\/span><\/span> T<\/b><\/span><\/span><\/span>i<\/b><\/span><\/span><\/sub><\/span> \/ T<\/b><\/span><\/span><\/span>f<\/b><\/span><\/span><\/sub><\/span> = 1\/2, a massa n\u00e3o interfere no per\u00edodo.<\/b><\/span><\/span><\/span><\/p>\n

(E)<\/b><\/span><\/span><\/span> T<\/b><\/span><\/span><\/span>i<\/b><\/span><\/span><\/sub><\/span> \/ T<\/b><\/span><\/span><\/span>f<\/b><\/span><\/span><\/sub><\/span> = 3\/4, a massa n\u00e3o interfere no per\u00edodo.<\/b><\/span><\/span><\/span><\/p>\n

04-(UCPel-RS-015)<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

Considere as <\/b><\/span><\/span><\/span>Leis de Newton<\/b><\/span><\/span><\/span> e assinale a <\/b><\/span><\/span><\/span>op\u00e7\u00e3o correta<\/b><\/span><\/span><\/span> relativa a um objeto que est\u00e1 apoiado <\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

em um <\/b><\/span><\/span><\/span>plano horizontal sem qualquer tipo de atrito.<\/b><\/span><\/span><\/span><\/p>\n

(A)<\/b><\/span><\/span><\/span> Uma for\u00e7a surge no objeto devido a mudan\u00e7as em sua acelera\u00e7\u00e3o. Quando dois objetos de<\/b><\/span><\/span><\/span><\/p>\n

mesma massa possuem a mesma acelera\u00e7\u00e3o, eles est\u00e3o, consequentemente, sujeitos \u00e0 a\u00e7\u00e3o de<\/b><\/span><\/span><\/span><\/p>\n

for\u00e7as de mesma intensidade. A trajet\u00f3ria de um objeto acelerado pode ser tanto curvil\u00ednea,<\/b><\/span><\/span><\/span><\/p>\n

quanto retil\u00ednea.<\/b><\/span><\/span><\/span><\/p>\n

(B)<\/b><\/span><\/span><\/span> Uma acelera\u00e7\u00e3o surge nesse objeto, quando ele est\u00e1 submetido \u00e0 a\u00e7\u00e3o de uma for\u00e7a.<\/b><\/span><\/span><\/span><\/p>\n

Consequentemente, a velocidade do objeto tamb\u00e9m varia e sua trajet\u00f3ria pode ser tanto<\/b><\/span><\/span><\/span><\/p>\n

curvil\u00ednea, quanto retil\u00ednea.<\/b><\/span><\/span><\/span><\/p>\n

(C)<\/b><\/span><\/span><\/span> O objeto pode estar acelerado sem que haja uma for\u00e7a atuando sobre ele, desde que ele se<\/b><\/span><\/span><\/span><\/p>\n

encontre em movimento. Entretanto, quando h\u00e1 uma for\u00e7a atuando sobre um corpo, a acelera\u00e7\u00e3o<\/b><\/span><\/span><\/span><\/p>\n

ser\u00e1 inversamente proporcional a essa for\u00e7a.<\/b><\/span><\/span><\/span><\/p>\n

(D)<\/b><\/span><\/span><\/span> Uma acelera\u00e7\u00e3o no objeto faz com que surja nele uma for\u00e7a que \u00e9 diretamente proporcional<\/b><\/span><\/span><\/span><\/p>\n

\u00e0 sua massa. Quanto maior a massa, maior a acelera\u00e7\u00e3o. A velocidade do objeto pode ou n\u00e3o<\/b><\/span><\/span><\/span><\/p>\n

alterar-se devido \u00e0 aplica\u00e7\u00e3o dessa acelera\u00e7\u00e3o.<\/b><\/span><\/span><\/span><\/p>\n

(<\/b><\/span><\/span><\/span>E)<\/b><\/span><\/span><\/span> De acordo com lei da a\u00e7\u00e3o e rea\u00e7\u00e3o, o objeto pode ser acelerado sem que haja uma for\u00e7a<\/b><\/span><\/span><\/span><\/p>\n

atuando sobre ele. A acelera\u00e7\u00e3o pode ser causada pela varia\u00e7\u00e3o de velocidade que ser\u00e1, ent\u00e3o,<\/b><\/span><\/span><\/span><\/p>\n

respons\u00e1vel pela for\u00e7a que surge no objeto<\/b><\/span><\/span><\/span>.<\/p>\n

05-(UCPel-RS-015)<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

Analise as <\/b><\/span><\/span><\/span>afirmativas abaixo<\/b><\/span><\/span><\/span> e assinale a <\/b><\/span><\/span><\/span>op\u00e7\u00e3o correta.<\/b><\/span><\/span><\/span><\/p>\n

I.<\/b><\/span><\/span><\/span> Ondas mec\u00e2nicas e eletromagn\u00e9ticas s\u00e3o refratadas, quando se propagam atrav\u00e9s de uma<\/b><\/span><\/span><\/span><\/p>\n

superf\u00edcie que separa dois meios com diferentes \u00edndices de refra\u00e7\u00e3o. Entretanto, de acordo com<\/b><\/span><\/span><\/span><\/p>\n

a \u00f3tica geom\u00e9trica, se o \u00e2ngulo de incid\u00eancia de um raio de luz sobre uma superf\u00edcie plana for<\/b><\/span><\/span><\/span><\/p>\n

igual a 90\u00b0, esse raio de luz n\u00e3o ter\u00e1 sua dire\u00e7\u00e3o de propaga\u00e7\u00e3o alterada.<\/b><\/span><\/span><\/span><\/p>\n

II.<\/b><\/span><\/span><\/span> Ondas mec\u00e2nicas necessitam de um meio material para sua propaga\u00e7\u00e3o, enquanto ondas<\/b><\/span><\/span><\/span><\/p>\n

eletromagn\u00e9ticas n\u00e3o se propagam atrav\u00e9s de meios materiais.<\/b><\/span><\/span><\/span><\/p>\n

III.<\/b><\/span><\/span><\/span>Ondas eletromagn\u00e9ticas, ao se propagarem, podem ter suas amplitudes somadas, quando se<\/b><\/span><\/span><\/span><\/p>\n

superp\u00f5em a outras que cruzam o mesmo meio.<\/b><\/span><\/span><\/span><\/p>\n

Por causa desse efeito, \u00e9 poss\u00edvel que, embora existam ondas se propagando atrav\u00e9s de uma<\/b><\/span><\/span><\/span><\/p>\n

regi\u00e3o no espa\u00e7o, encontrem-se, nessa regi\u00e3o, locais onde a amplitude resultante iguala-se a<\/b><\/span><\/span><\/span><\/p>\n

zero.<\/b><\/span><\/span><\/span><\/p>\n

IV.<\/b><\/span><\/span><\/span>Uma onda eletromagn\u00e9tica n\u00e3o \u00e9 capaz de se propagar para o interior de um volume, cuja<\/b><\/span><\/span><\/span><\/p>\n

superf\u00edcie se encontra revestida por uma camada de certo material condutor. Entretanto, se a onda<\/b><\/span><\/span><\/span><\/p>\n

for polarizada, ela ser\u00e1 capaz de atravessar essa superf\u00edcie.<\/b><\/span><\/span><\/span><\/p>\n

V.<\/b><\/span><\/span><\/span> A velocidade de propaga\u00e7\u00e3o, tanto das ondas eletromagn\u00e9ticas, quanto das mec\u00e2nicas, depende das caracter\u00edsticas do meio no qual elas se propagam.<\/b><\/span><\/span><\/span><\/p>\n

(A)<\/b><\/span><\/span><\/span> Est\u00e3o corretas III, IV e V.<\/b><\/span><\/span><\/span><\/p>\n

(B)<\/b><\/span><\/span><\/span> Est\u00e3o corretas I, IV e V.<\/b><\/span><\/span><\/span><\/p>\n

(C)<\/b><\/span><\/span><\/span> Est\u00e3o corretas I, II e IV.<\/b><\/span><\/span><\/span><\/p>\n

(D)<\/b><\/span><\/span><\/span> Est\u00e3o corretas II, IV e V.<\/b><\/span><\/span><\/span><\/p>\n

(E)<\/b><\/span><\/span><\/span> Est\u00e3o corretas I, III e V.<\/b><\/span><\/span><\/span><\/p>\n

06-(UCPel-RS-015)<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

Uma <\/b><\/span><\/span><\/span>esfera maci\u00e7a e homog\u00eanea de ferro<\/b><\/span><\/span><\/span>, que se encontra <\/b><\/span><\/span><\/span>submersa a uma profundidade de <\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

dois metros em uma piscina, \u00e9 liberada a partir do repouso. <\/b><\/span><\/span><\/span><\/p>\n

Desconsidere os <\/b><\/span><\/span><\/span>efeitos das for\u00e7as<\/b><\/span><\/span><\/span> que resultam da viscosidade da \u00e1gua. <\/b><\/span><\/span><\/span><\/p>\n

Qual a <\/b><\/span><\/span><\/span>acelera\u00e7\u00e3o resultante na esfera?<\/b><\/span><\/span><\/span> <\/b><\/p>\n

Ela <\/b><\/span><\/span><\/span>afunda <\/b><\/span><\/span><\/span>ou <\/b><\/span><\/span><\/span>sobe <\/b><\/span><\/span><\/span>\u00e0 superf\u00edcie? <\/b><\/span><\/span><\/span><\/p>\n

Qual a <\/b><\/span><\/span><\/span>considera\u00e7\u00e3o correta<\/b><\/span><\/span><\/span> para a <\/b><\/span><\/span><\/span>energia potencial gravitacional da esfera, quando ela se encontra na profundidade de 2 metros?<\/b><\/span><\/span><\/span><\/p>\n

Considere <\/b><\/span><\/span><\/span>d<\/b><\/span><\/span><\/span>\u00e1gua<\/b><\/span><\/span><\/sub><\/span> = 1.000 kg\/m<\/b><\/span><\/span><\/span>3<\/b><\/span><\/span><\/sup><\/span> <\/b>, d<\/b><\/span><\/span><\/span>ferro<\/b><\/span><\/span><\/sub><\/span> = 8.000 kg\/m<\/b><\/span><\/span><\/span>3<\/b><\/span><\/span><\/sup><\/span>, g = 10 m\/s<\/b><\/span><\/span><\/span>2<\/b><\/span><\/span><\/sup><\/span>.<\/b><\/span><\/span><\/span> <\/b><\/p>\n

Assinale a op\u00e7\u00e3o que apresenta as <\/b><\/span><\/span><\/span>respostas corretas.<\/b><\/span><\/span><\/span><\/p>\n

(A)<\/b><\/span><\/span><\/span> a = -8.75 m\/s<\/b><\/span><\/span><\/span>2<\/b><\/span><\/span><\/sup><\/span>, a esfera emerge. A energia potencial depende apenas de sua posi\u00e7\u00e3o inicial<\/b><\/span><\/span><\/span><\/p>\n

e final e da intensidade da acelera\u00e7\u00e3o da gravidade no local.<\/b><\/span><\/span><\/span><\/p>\n

(B)<\/b><\/span><\/span><\/span> a = 10 m\/s<\/b><\/span><\/span><\/span>2<\/b><\/span><\/span><\/sup><\/span>, a esfera afunda na piscina. A energia potencial depende apenas das caracter\u00edsticas<\/b><\/span><\/span><\/span><\/p>\n

f\u00edsicas da esfera e da intensidade da acelera\u00e7\u00e3o da gravidade no local.<\/b><\/span><\/span><\/span><\/p>\n

(C)<\/b><\/span><\/span><\/span> a = 8.75 m\/s<\/b><\/span><\/span><\/span>2<\/b><\/span><\/span><\/sup><\/span>, a esfera afunda na piscina. A energia potencial depende da massa, da acelera\u00e7\u00e3o gravitacional e de sua posi\u00e7\u00e3o vertical inicial e final.<\/b><\/span><\/span><\/span><\/p>\n

(D)<\/b><\/span><\/span><\/span> a = 8.75 m\/s<\/b><\/span><\/span><\/span>2<\/b><\/span><\/span><\/sup><\/span>, a esfera afunda na piscina. A energia potencial depende apenas da intensidade<\/b><\/span><\/span><\/span><\/p>\n

do campo gravitacional e de sua posi\u00e7\u00e3o vertical inicial e final.<\/b><\/span><\/span><\/span><\/p>\n

(E)<\/b><\/span><\/span><\/span> a = – 6.75 m\/s<\/b><\/span><\/span><\/span>2<\/b><\/span><\/span><\/sup><\/span>, a esfera movimenta-se em dire\u00e7\u00e3o \u00e0 superf\u00edcie. A energia potencial depende apenas da intensidade do campo gravitacional e de sua posi\u00e7\u00e3o vertical inicial e final.<\/b><\/span><\/span><\/span><\/p>\n

07-(UCPel-RS-015)<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

Assinale a <\/b><\/span><\/span><\/span>op\u00e7\u00e3o que se encontra fisicamente correta em rela\u00e7\u00e3o a um astronauta dentro de um<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

\u00f4nibus espacial que orbita a Terra.<\/b><\/span><\/span><\/span><\/p>\n

(A)<\/b><\/span><\/span><\/span> A massa do astronauta diminui devido \u00e0 grande dist\u00e2ncia em que ele se encontra do centro da<\/b><\/span><\/span><\/span><\/p>\n

Terra. Consequentemente, a for\u00e7a peso tamb\u00e9m diminui e se torna praticamente zero. Por isso,<\/b><\/span><\/span><\/span><\/p>\n

o astronauta flutua no interior do \u00f4nibus espacial.<\/b><\/span><\/span><\/span><\/p>\n

(B)<\/b><\/span><\/span><\/span> Devido \u00e0 grande dist\u00e2ncia da \u00f3rbita do \u00f4nibus espacial, o campo gravitacional terrestre n\u00e3o<\/b><\/span><\/span><\/span><\/p>\n

exerce influ\u00eancia no astronauta, que flutua devido \u00e0 diminui\u00e7\u00e3o de sua massa e, consequentemente, de seu peso.<\/b><\/span><\/span><\/span><\/p>\n

(C)<\/b><\/span><\/span><\/span> O \u00f4nibus espacial \u00e9 colocado a uma altitude na qual os campos gravitacionais da Lua, da Terra<\/b><\/span><\/span><\/span><\/p>\n

e do Sol se superp\u00f5e e se anulam. Por isso, quando est\u00e1 no espa\u00e7o, o astronauta n\u00e3o tem massa e flutua.<\/b><\/span><\/span><\/span><\/p>\n

(D)<\/b><\/span><\/span><\/span> O astronauta ainda sente os efeitos da for\u00e7a causada pelo campo gravitacional terrestre,<\/b><\/span><\/span><\/span><\/p>\n

embora com um valor um pouco menor do que o que sentiria na superf\u00edcie. Como a for\u00e7a<\/b><\/span><\/span><\/span><\/p>\n

gravitacional \u00e9 menor, seu peso tamb\u00e9m ser\u00e1 menor.<\/b><\/span><\/span><\/span><\/p>\n

(E)<\/b><\/span><\/span><\/span> O \u00f4nibus espacial se encontra em movimento circular uniforme ao redor da terra, enquanto o<\/b><\/span><\/span><\/span><\/p>\n

astronauta, em seu interior, est\u00e1 em movimento retil\u00edneo uniforme. A superposi\u00e7\u00e3o desses dois<\/b><\/span><\/span><\/span><\/p>\n

movimentos \u00e9 a raz\u00e3o pela qual o astronauta se mostra aparentemente sem peso. A massa, entretanto, permanece constante.<\/b><\/span><\/span><\/span><\/p>\n

<\/h2>\n

Confira a resolu\u00e7\u00e3o comentada.<\/span><\/a><\/h2>\n","protected":false},"excerpt":{"rendered":"

  A\u00a0Universidade Cat\u00f3lica de Pelotas\u00a0(UCPel) tem sua estrutura de 52 mil metros quadrados dividida basicamente em quatro grandes centros.\u00a0 No Centro de Ci\u00eancias da Vida e da Sa\u00fade est\u00e3o\u00a0os cursos de Ci\u00eancias Biol\u00f3gicas, Ecologia, Enfermagem, Farm\u00e1cia, Fisioterapia, Medicina e Psicologia.\u00a0 O Centro de Ci\u00eancias Jur\u00eddicas, Econ\u00f4micas e Sociais engloba\u00a0as gradua\u00e7\u00f5es de Administra\u00e7\u00e3o, Ci\u00eancias Cont\u00e1beis, Economia, Direito, Servi\u00e7o Social e Tecnologia<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":5,"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-777","page","type-page","status-publish","hentry"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages\/777","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=777"}],"version-history":[{"count":2,"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages\/777\/revisions"}],"predecessor-version":[{"id":781,"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages\/777\/revisions\/781"}],"up":[{"embeddable":true,"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages\/5"}],"wp:attachment":[{"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/media?parent=777"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}