{"id":702,"date":"2015-05-12T18:35:15","date_gmt":"2015-05-12T18:35:15","guid":{"rendered":"http:\/\/fisicaevestibular.com.br\/novo\/?page_id=702"},"modified":"2024-09-03T12:57:22","modified_gmt":"2024-09-03T12:57:22","slug":"exercicios-resolvidos-da-unespar-2015","status":"publish","type":"page","link":"https:\/\/fisicaevestibular.com.br\/novo\/universidades-2015\/exercicios-resolvidos-da-unespar-2015\/","title":{"rendered":"Exerc\u00edcios Resolvidos da UNESPAR 2015"},"content":{"rendered":"

\"\"<\/p>\n

Universidade Estadual do Paran\u00e1<\/b><\/span><\/span><\/span><\/p>\n

A Universidade Estadual do Paran\u00e1 (Unespar) \u00e9 uma institui\u00e7\u00e3o de ensino p\u00fablica vinculada ao Governo do Estado do Paran\u00e1 por meio da Secretaria de Estado de Ci\u00eancia, Tecnologia e Ensino Superior. \u00c9 constitu\u00edda por sete faculdades espalhadas por Curitiba e mais cinco munic\u00edpios do interior paranaense. Foi criada atrav\u00e9s da Lei Estadual n\u00b0 13.283 de 25 de outubro de 2001. Por for\u00e7a do Decreto Estadual de 5 de dezembro de 2013, tamb\u00e9m foi incorporada \u00e0 Unespar a Escola Superior de Seguran\u00e7a P\u00fablica da Academia Policial Militar de Gatup\u00ea. A institui\u00e7\u00e3o conta hoje com 70 cursos<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

01-(UNESPAR-PR-015)<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

Sabemos por defini\u00e7\u00e3o que <\/b><\/span><\/span><\/span>\u201cCalor \u00e9 a energia t\u00e9rmica que se transfere entre corpos em<\/b><\/span><\/span><\/span> <\/b>temperaturas diferentes\u201d.<\/b><\/span><\/span><\/span> Sabemos tamb\u00e9m que existem <\/b><\/span><\/span><\/span>tr\u00eas<\/b><\/span><\/span><\/span> formas de ocorrer essa troca de energia: <\/b><\/span><\/span><\/span>condu\u00e7\u00e3o, convec\u00e7\u00e3o e irradia\u00e7\u00e3o.<\/b><\/span><\/span><\/span> Com rela\u00e7\u00e3o a isto, <\/b><\/span><\/span><\/span>julgue<\/b><\/span><\/span><\/span> os itens a seguir<\/b><\/span><\/span><\/span><\/p>\n

em <\/b><\/span><\/span><\/span>(V)<\/b><\/span><\/span><\/span> para as afirmativas verdadeiras e <\/b><\/span><\/span><\/span>(F)<\/b><\/span><\/span><\/span> para as falsas, depois assinale a alternativa que traz a <\/b><\/span><\/span><\/span>sequ\u00eancia correta<\/b><\/span><\/span><\/span>:<\/b><\/span><\/span><\/span><\/p>\n

( )<\/b><\/span><\/span><\/span> Na <\/b><\/span><\/span><\/span>irradia\u00e7\u00e3o<\/b><\/span><\/span><\/span>, para que a energia t\u00e9rmica se propague \u00e9 necess\u00e1rio <\/b><\/span><\/span><\/span>existir um meio material.<\/b><\/span><\/span><\/span><\/p>\n

( )<\/b><\/span><\/span><\/span> A condu\u00e7\u00e3o acontece quando a troca de energia t\u00e9rmica \u00e9 feita <\/b><\/span><\/span><\/span>sem a presen\u00e7a de um meio material.<\/b><\/span><\/span><\/span><\/p>\n

( )<\/b><\/span><\/span><\/span> A <\/b><\/span><\/span><\/span>convec\u00e7\u00e3o <\/b><\/span><\/span><\/span>\u00e9 o processo de transmiss\u00e3o de calor em que a energia t\u00e9rmica se propaga em meios fluidos (l\u00edquidos e gases) atrav\u00e9s de correntes de convec\u00e7\u00e3o.<\/b><\/span><\/span><\/span><\/p>\n

( )<\/b><\/span><\/span><\/span> A forma como ocorre a refrigera\u00e7\u00e3o de uma geladeira \u00e9 um exemplo de <\/b><\/span><\/span><\/span>condu\u00e7\u00e3o<\/b><\/span><\/span><\/span>.<\/b><\/span><\/span><\/span><\/p>\n

( )<\/b><\/span><\/span><\/span> Sentimos o calor do Sol devido as radia\u00e7\u00f5es eletromagn\u00e9ticas que ele emite e que atravessam o<\/b><\/span><\/span><\/span><\/p>\n

v\u00e1cuo existente entre o Sol e a Terra, isto \u00e9 um exemplo de Irradia\u00e7\u00e3o.<\/b><\/span><\/span><\/span><\/p>\n

a)<\/b><\/span><\/span><\/span><\/span> F V F F V; <\/b><\/span><\/span><\/span><\/span>b)<\/b><\/span><\/span><\/span><\/span> F F V F V; <\/b><\/span><\/span><\/span><\/span>c)<\/b><\/span><\/span><\/span><\/span> V F V F V; <\/b><\/span><\/span><\/span><\/span>d) <\/b><\/span><\/span><\/span><\/span>F F V V V; <\/b><\/span><\/span><\/span><\/span>e)<\/b><\/span><\/span><\/span><\/span> V V F V F.<\/b><\/span><\/span><\/span><\/span><\/p>\n

02-(UNESPAR-PR-015)<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

Quando submetido a uma <\/b><\/span><\/span><\/span>tens\u00e3o de 220 V<\/b><\/span><\/span><\/span>, um aparelho resistivo consome uma <\/b><\/span><\/span><\/span>pot\u00eancia de 80 W.<\/b><\/span><\/span><\/span> <\/b><\/p>\n

\"\"<\/p>\n

Assinale a op\u00e7\u00e3o que cont\u00e9m a <\/b><\/span><\/span><\/span>corrente el\u00e9trica do aparelho e a energia el\u00e9trica (em kWh)<\/b><\/span><\/span><\/span> consumida em <\/b><\/span><\/span><\/span>5h,<\/b><\/span><\/span><\/span> respectivamente:<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

03-(UNESPAR-PR-015)<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

Considere <\/b><\/span><\/span><\/span>duas cargas puntiformes<\/b><\/span><\/span><\/span> com quantidade de carga iguais a <\/b><\/span><\/span><\/span>q<\/b><\/span><\/span><\/span>1<\/b><\/span><\/span><\/sub><\/span>=+2.10<\/b><\/span><\/span><\/span>-6<\/b><\/span><\/span><\/sup><\/span> C e q<\/b><\/span><\/span><\/span>2<\/b><\/span><\/span><\/sub><\/span> = -6.10<\/b><\/span><\/span><\/span>-4<\/b><\/span><\/span><\/sup><\/span> C,<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

separadas por uma <\/b><\/span><\/span><\/span>dist\u00e2ncia de 2 metros.<\/b><\/span><\/span><\/span> Qual alternativa apresenta a <\/b><\/span><\/span><\/span>For\u00e7a El\u00e9trica<\/b><\/span><\/span><\/span> que estas part\u00edculas <\/b><\/span><\/span><\/span>exerceriam entre si?<\/b><\/span><\/span><\/span><\/p>\n

Dados: as cargas est\u00e3o no <\/b><\/span><\/span><\/span>v\u00e1cuo e a constante <\/b><\/span><\/span><\/span>K<\/b><\/i><\/span><\/span><\/span>v\u00e1cuo<\/b><\/i><\/span><\/span><\/sub><\/span> <\/b><\/i>= 9,0.10<\/b><\/span><\/span><\/span>9<\/b><\/span><\/span><\/sup><\/span> <\/b>N.m<\/b><\/i><\/span><\/span><\/span>2<\/b><\/span><\/span><\/sup><\/span>\/<\/b><\/span><\/span><\/span>C<\/b><\/i><\/span><\/span><\/span>2<\/b><\/span><\/span><\/sup><\/span>.<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

04-(UNESPAR-PR-015)<\/b><\/span><\/span><\/span><\/p>\n

Seja o <\/b><\/span><\/span><\/span>circuito el\u00e9trico<\/b><\/span><\/span><\/span> misto representado pela figura abaixo. <\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

Sabendo que <\/b><\/span><\/span><\/span>R<\/b><\/span><\/span><\/span>1<\/b><\/span><\/span><\/sub><\/span>=R<\/b><\/span><\/span><\/span>2<\/b><\/span><\/span><\/sub><\/span>= 100 \u2126, R<\/b><\/span><\/span><\/span>3<\/b><\/span><\/span><\/sub><\/span>=50 \u2126, R<\/b><\/span><\/span><\/span>4<\/b><\/span><\/span><\/sub><\/span>=R<\/b><\/span><\/span><\/span>5<\/b><\/span><\/span><\/sub><\/span>=150 \u2126<\/b><\/span><\/span><\/span> e que a bateria fornece <\/b><\/span><\/span><\/span>20 V,<\/b><\/span><\/span><\/span> assinale a<\/b><\/span><\/span><\/span><\/p>\n

alternativa que cont\u00e9m a <\/b><\/span><\/span><\/span>resist\u00eancia equivalente do circuito, a corrente que passa pelo circuito e a potencia total dissipada pelo circuito, respectivamente:<\/b><\/span><\/span><\/span><\/p>\n

a)<\/b><\/span><\/span><\/span> R<\/b><\/span><\/span><\/span>req<\/b><\/span><\/span><\/sub><\/span> = 150 W; i = 0,4 A; P<\/b><\/span><\/span><\/span>t<\/b><\/span><\/span><\/sub><\/span> = 3,74 W;<\/b><\/span><\/span><\/span><\/p>\n

b)<\/b><\/span><\/span><\/span> R<\/b><\/span><\/span><\/span>req<\/b><\/span><\/span><\/sub><\/span> = 75 W; i = 0,114 A; P<\/b><\/span><\/span><\/span>t<\/b><\/span><\/span><\/sub><\/span> = 274 W;<\/b><\/span><\/span><\/span><\/p>\n

c<\/b><\/span><\/span><\/span>) R<\/b><\/span><\/span><\/span>req<\/b><\/span><\/span><\/sub><\/span> = 175 W; i = 0,114 A; P<\/b><\/span><\/span><\/span>t<\/b><\/span><\/span><\/sub><\/span> = 2,2743 W;<\/b><\/span><\/span><\/span><\/p>\n

d)<\/b><\/span><\/span><\/span> R<\/b><\/span><\/span><\/span>req<\/b><\/span><\/span><\/sub><\/span> = 165 W; i = 0,14 A; P<\/b><\/span><\/span><\/span>t<\/b><\/span><\/span><\/sub><\/span> = 2,273 W;<\/b><\/span><\/span><\/span><\/p>\n

e)<\/b><\/span><\/span><\/span> R<\/b><\/span><\/span><\/span>req<\/b><\/span><\/span><\/sub><\/span> = 175 W; i = 0,114 A; P<\/b><\/span><\/span><\/span>t<\/b><\/span><\/span><\/sub><\/span> = 5,2743 W.<\/b><\/span><\/span><\/span><\/p>\n

05-(UNESPAR-PR-015)<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

Uma <\/b><\/span><\/span><\/span>crian\u00e7a de 23 kg<\/b><\/span><\/span><\/span>, parte do ponto <\/b><\/span><\/span><\/span>A <\/b><\/span><\/span><\/span>com velocidade de <\/b><\/span><\/span><\/span>2 m\/s<\/b><\/span><\/span><\/span> e <\/b><\/span><\/span><\/span>desce<\/b><\/span><\/span><\/span> o plano inclinado e <\/b><\/span><\/span><\/span>sem<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

atrito <\/b><\/span><\/span><\/span>do escorregador representado na figura abaixo. Assinale a <\/b><\/span><\/span><\/span>alternativa<\/b><\/span><\/span><\/span> em que cont\u00e9m a <\/b><\/span><\/span><\/span>velocidade <\/b><\/span><\/span><\/span>da crian\u00e7a quando ela passa pelo <\/b><\/span><\/span><\/span>ponto B:<\/b><\/span><\/span><\/span><\/p>\n

Dados: <\/b><\/span><\/span><\/span>g = 10 m\/s<\/b><\/span><\/span><\/span>2<\/b><\/span><\/span><\/sup><\/span>; d<\/b><\/span><\/span><\/span>A<\/b><\/span><\/span><\/sub><\/span> = 2,65 m e d<\/b><\/span><\/span><\/span>B<\/b><\/span><\/span><\/sub><\/span> = 0,4 m.<\/b><\/span><\/span><\/span> <\/b><\/p>\n

\"\"<\/p>\n

06-(UNESPAR-PR-015)<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

Considere o <\/b><\/span><\/span><\/span>espelho esf\u00e9rico c\u00f4ncavo<\/b><\/span><\/span><\/span> de <\/b><\/span><\/span><\/span>raio de curvatura 20 cm<\/b><\/span><\/span><\/span>. Considere ainda um <\/b><\/span><\/span><\/span>objeto de 5<\/b><\/span><\/span><\/span> <\/b><\/p>\n

\"\"<\/p>\n

cm localizado a 15 cm do v\u00e9rtice<\/b><\/span><\/span><\/span>. Com rela\u00e7\u00e3o \u00e0s <\/b><\/span><\/span><\/span>caracter\u00edsticas<\/b><\/span><\/span><\/span> da imagem formada, <\/b><\/span><\/span><\/span>julgue<\/b><\/span><\/span><\/span> os itens a seguir:<\/b><\/span><\/span><\/span><\/p>\n

(2)<\/b><\/span><\/span><\/span> A imagem ser\u00e1 formada a 30 cm do v\u00e9rtice do espelho.<\/b><\/span><\/span><\/span><\/p>\n

(4)<\/b><\/span><\/span><\/span> A imagem ter\u00e1 2,5 cm.<\/b><\/span><\/span><\/span><\/p>\n

(8)<\/b><\/span><\/span><\/span> A imagem ser\u00e1 virtual e direita.<\/b><\/span><\/span><\/span><\/p>\n

(16)<\/b><\/span><\/span><\/span> A imagem ser\u00e1 real e invertida.<\/b><\/span><\/span><\/span><\/p>\n

(32)<\/b><\/span><\/span><\/span> A imagem ser\u00e1 duas vezes maior que o objeto.<\/b><\/span><\/span><\/span><\/p>\n

(64)<\/b><\/span><\/span><\/span> A imagem ser\u00e1 formada sobre o centro de curvatura.<\/b><\/span><\/span><\/span><\/p>\n

Assinale a <\/b><\/span><\/span><\/span>alternativa <\/b><\/span><\/span><\/span>que apresenta o <\/b><\/span><\/span><\/span>somat\u00f3rio das afirmativas corretas.<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

07-(UNESPAR-PR-015)<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

Considere as seguintes subst\u00e2ncias e suas densidades aproximadas:<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

Sabendo que em <\/b><\/span><\/span><\/span>F\u00edsica<\/b><\/span><\/span><\/span>, o que determina a <\/b><\/span><\/span><\/span>flutua\u00e7\u00e3o ou submers\u00e3o<\/b><\/span><\/span><\/span> de um objeto em um fluido \u00e9 o <\/b><\/span><\/span><\/span>Empuxo (E=d<\/b><\/span><\/span><\/span>fluido<\/b><\/span><\/span><\/sub><\/span> .V<\/b><\/span><\/span><\/span>fluidodeslocado<\/b><\/span><\/span><\/sub><\/span>.g).<\/b><\/span><\/span><\/span><\/p>\n

Considere ent\u00e3o <\/b><\/span><\/span><\/span>tr\u00eas blocos<\/b><\/span><\/span><\/span> de <\/b><\/span><\/span><\/span>mesmo volume<\/b><\/span><\/span><\/span>, um de <\/b><\/span><\/span><\/span>ferro<\/b><\/span><\/span><\/span>, um de <\/b><\/span><\/span><\/span>chumbo<\/b><\/span><\/span><\/span> e um de <\/b><\/span><\/span><\/span>gelo<\/b><\/span><\/span><\/span>. Nestas condi\u00e7\u00f5es, <\/b><\/span><\/span><\/span>assinale<\/b><\/span><\/span><\/span> a <\/b><\/span><\/span><\/span>alternativa correta:<\/b><\/span><\/span><\/span><\/p>\n

a)<\/b><\/span><\/span><\/span> O bloco de gelo flutua na \u00e1gua, no \u00f3leo e no merc\u00fario, mas n\u00e3o flutua no \u00e1lcool;<\/b><\/span><\/span><\/span><\/p>\n

b)<\/b><\/span><\/span><\/span> O bloco de ferro flutua no merc\u00fario, mas n\u00e3o flutua na \u00e1gua, no \u00e1lcool e nem no \u00f3leo;<\/b><\/span><\/span><\/span><\/p>\n

c)<\/b><\/span><\/span><\/span> O bloco de chumbo flutua em todas as subst\u00e2ncias l\u00edquidas;<\/b><\/span><\/span><\/span><\/p>\n

d)<\/b><\/span><\/span><\/span> O bloco de gelo n\u00e3o flutua na \u00e1gua;<\/b><\/span><\/span><\/span><\/p>\n

e)<\/b><\/span><\/span><\/span> O bloco de ferro afunda somente na \u00e1gua.<\/b><\/span><\/span><\/span><\/p>\n

08-(UNESPAR-PR-015)<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

Um <\/b><\/span><\/span><\/span>jogador de futebol<\/b><\/span><\/span><\/span>, ao cobrar um p\u00eanalti, imprime \u00e0 bola uma <\/b><\/span><\/span><\/span>velocidade m\u00e9dia<\/b><\/span><\/span><\/span> de 75 km\/h. Se o goleiro estiver atento e bem posicionado, consegue <\/b><\/span><\/span><\/span>agarrar a bola e impedir o gol<\/b><\/span><\/span><\/span>. Agora, se o <\/b><\/span><\/span><\/span>mesmo goleiro<\/b><\/span><\/span><\/span> resolver ficar parado na frente de um <\/b><\/span><\/span><\/span>\u00f4nibus<\/b><\/span><\/span><\/span> de transporte urbano, que venha \u00e0 <\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

mesma velocidade m\u00e9dia<\/b><\/span><\/span><\/span> de 75 km\/h, ele <\/b><\/span><\/span><\/span>n\u00e3o<\/b><\/span><\/span><\/span> conseguir\u00e1 par\u00e1-lo. Assinale a alternativa que contenha <\/b><\/span><\/span><\/span>o(s) fen\u00f4meno(s) f\u00edsico(s) que explicam essa situa\u00e7\u00e3o:<\/b><\/span><\/span><\/span><\/p>\n

Dados:<\/b><\/span><\/span><\/span> Massa da bola (m<\/b><\/span><\/span><\/span>b<\/b><\/span><\/span><\/sub><\/span>=1,2 kg) e massa do \u00f4nibus (m<\/b><\/span><\/span><\/span>o<\/b><\/span><\/span><\/sub><\/span>=1,5×10\u00b3 kg).<\/b><\/span><\/span><\/span><\/p>\n

a)<\/b><\/span><\/span><\/span> Velocidade escalar m\u00e9dia;<\/b><\/span><\/span><\/span><\/p>\n

b)<\/b><\/span><\/span><\/span> Movimento Circular e Gravita\u00e7\u00e3o Universal;<\/b><\/span><\/span><\/span><\/p>\n

c)<\/b><\/span><\/span><\/span> Termodin\u00e2mica e Cinem\u00e1tica Escalar;<\/b><\/span><\/span><\/span><\/p>\n

d)<\/b><\/span><\/span><\/span> Quantidade de Movimento e Impulso de uma For\u00e7a;<\/b><\/span><\/span><\/span><\/p>\n

e)<\/b><\/span><\/span><\/span> Gravita\u00e7\u00e3o Universal.<\/b><\/span><\/span><\/span><\/p>\n

09-(UNESPAR-PR-015)<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

Se um <\/b><\/span><\/span><\/span>autom\u00f3ve<\/b><\/span><\/span><\/span>l realiza um percurso de uma cidade <\/b><\/span><\/span><\/span>A <\/b><\/span><\/span><\/span>para uma cidade <\/b><\/span><\/span><\/span>B <\/b><\/span><\/span><\/span>com uma <\/b><\/span><\/span><\/span>velocidade <\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

escalar m\u00e9dia de 80 km\/h e ap\u00f3s 45 min chega ao seu destino<\/b><\/span><\/span><\/span>, ent\u00e3o a <\/b><\/span><\/span><\/span>dist\u00e2ncia entre as cidades \u00e9 de:<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

<\/h2>\n

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

Universidade Estadual do Paran\u00e1 A Universidade Estadual do Paran\u00e1 (Unespar) \u00e9 uma institui\u00e7\u00e3o de ensino p\u00fablica vinculada ao Governo do Estado do Paran\u00e1 por meio da Secretaria de Estado de Ci\u00eancia, Tecnologia e Ensino Superior. \u00c9 constitu\u00edda por sete faculdades espalhadas por Curitiba e mais cinco munic\u00edpios do interior paranaense. Foi criada atrav\u00e9s da Lei Estadual n\u00b0 13.283 de 25<\/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-702","page","type-page","status-publish","hentry"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages\/702","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=702"}],"version-history":[{"count":2,"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages\/702\/revisions"}],"predecessor-version":[{"id":706,"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages\/702\/revisions\/706"}],"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=702"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}