{"id":833,"date":"2015-05-14T17:42:21","date_gmt":"2015-05-14T17:42:21","guid":{"rendered":"http:\/\/fisicaevestibular.com.br\/novo\/?page_id=833"},"modified":"2024-09-03T13:06:46","modified_gmt":"2024-09-03T13:06:46","slug":"exercicios-resolvidos-da-unifor-2015","status":"publish","type":"page","link":"https:\/\/fisicaevestibular.com.br\/novo\/universidades-2015\/exercicios-resolvidos-da-unifor-2015\/","title":{"rendered":"Exerc\u00edcios Resolvidos da UNIFOR 2015"},"content":{"rendered":"

\"\"<\/p>\n

A<\/b><\/span><\/span><\/span>\u00a0<\/b><\/span><\/span><\/span>Universidade de Fortaleza<\/b><\/span><\/span><\/span>\u00a0<\/b><\/span><\/span><\/span>(UNIFOR) \u00e9 uma<\/b><\/span><\/span><\/span>\u00a0<\/b><\/span><\/span><\/span>institui\u00e7\u00e3o de ensino superior<\/b><\/span><\/span><\/span><\/a>\u00a0<\/b><\/span><\/span><\/span>brasileira<\/b><\/span><\/span><\/span><\/a>\u00a0<\/b><\/span><\/span><\/span>e<\/b><\/span><\/span><\/span>\u00a0<\/b><\/span><\/span><\/span>entidade privada filantr\u00f3pica<\/b><\/span><\/span><\/span><\/a>\u00a0<\/b><\/span><\/span><\/span>localizada no<\/b><\/span><\/span><\/span>Bairro Edson Queiroz<\/b><\/span><\/span><\/span><\/a>\u00a0<\/b><\/span><\/span><\/span>em<\/b><\/span><\/span><\/span>\u00a0<\/b><\/span><\/span><\/span>Fortaleza<\/b><\/span><\/span><\/span><\/a>\u00a0<\/b><\/span><\/span><\/span>no estado do<\/b><\/span><\/span><\/span>\u00a0<\/b><\/span><\/span><\/span>Cear\u00e1<\/b><\/span><\/span><\/span><\/a>, na<\/b><\/span><\/span><\/span>\u00a0<\/b><\/span><\/span><\/span>Av. Washington Soares<\/b><\/span><\/span><\/span><\/a>. Surgiu em<\/b><\/span><\/span><\/span>\u00a0<\/b><\/span><\/span><\/span>1973<\/b><\/span><\/span><\/span><\/a>, fundada pelo grupo<\/b><\/span><\/span><\/span>\u00a0<\/b><\/span><\/span><\/span>Grupo Edson Queiroz<\/b><\/span><\/span><\/span><\/a>, por iniciativa do pr\u00f3prio<\/b><\/span><\/span><\/span>\u00a0<\/b><\/span><\/span><\/span>Edson Queiroz<\/b><\/span><\/span><\/span><\/a>.<\/b><\/span><\/span><\/span>1<\/b><\/span><\/span><\/span><\/a><\/p>\n

\"\"<\/p>\n

01-(UNIFOR-CE-015)<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

O <\/b><\/span><\/span><\/span>espelho c\u00f4ncavo<\/b><\/span><\/span><\/span> \u00e9 caracterizado como sendo uma <\/b><\/span><\/span><\/span>superf\u00edcie curva<\/b><\/span><\/span><\/span> onde a <\/b><\/span><\/span><\/span>parte interna \u00e9<\/b><\/span><\/span><\/span><\/p>\n

refletora.<\/b><\/span><\/span><\/span> Comumente os <\/b><\/span><\/span><\/span>espelhos c\u00f4ncavos<\/b><\/span><\/span><\/span> s\u00e3o utilizados em telesc\u00f3pios, projetores e tamb\u00e9m s\u00e3o <\/b><\/span><\/span><\/span>encontrados como instrumentos de trabalho nos consult\u00f3rios odontol\u00f3gicos que permitem observar<\/b><\/span><\/span><\/span> <\/b>determinadas caracter\u00edsticas dos dentes<\/b><\/span><\/span><\/span>. A figura a seguir mostra a <\/b><\/span><\/span><\/span>imagem de um dente<\/b><\/span><\/span><\/span> que est\u00e1 localizado entre o <\/b><\/span><\/span><\/span>foco e o v\u00e9rtice principal de um espelho c\u00f4ncavo:<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

A <\/b><\/span><\/span><\/span>imagem observada <\/b><\/span><\/span><\/span>pelo dentista, <\/b><\/span><\/span><\/span>formada por este espelho c\u00f4ncavo<\/b><\/span><\/span><\/span> \u00e9:<\/b><\/span><\/span><\/span><\/p>\n

(A)<\/b><\/span><\/span><\/span> virtual, direita e do mesmo tamanho do dente;<\/b><\/span><\/span><\/span><\/p>\n

(B)<\/b><\/span><\/span><\/span> real, direita e maior que o dente;<\/b><\/span><\/span><\/span><\/p>\n

(C)<\/b><\/span><\/span><\/span> virtual, invertida e do mesmo tamanho do dente;<\/b><\/span><\/span><\/span><\/p>\n

(D)<\/b><\/span><\/span><\/span> virtual, direita e maior que o dente;<\/b><\/span><\/span><\/span><\/p>\n

(E)<\/b><\/span><\/span><\/span> real, invertida e do mesmo tamanho do dente.<\/b><\/span><\/span><\/span><\/p>\n

02-(UNIFOR-CE-015)<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

O <\/b><\/span><\/span><\/span>bin\u00e1rio<\/b><\/span><\/span><\/span> \u00e9 um <\/b><\/span><\/span><\/span>sistema de for\u00e7as de mesma intensidade, mesma dire\u00e7\u00e3o, sentidos opostos<\/b><\/span><\/span><\/span>, mas com <\/b><\/span><\/span><\/span>linhas de a\u00e7\u00e3o n\u00e3o coincidentes<\/b><\/span><\/span><\/span>, ou seja, em <\/b><\/span><\/span><\/span>n\u00edveis diferentes<\/b><\/span><\/span><\/span>. <\/b><\/span><\/span><\/span><\/p>\n

A <\/b><\/span><\/span><\/span>resultante <\/b><\/span><\/span><\/span>dessas for\u00e7as neste sistema \u00e9 <\/b><\/span><\/span><\/span>nula,<\/b><\/span><\/span><\/span> o que <\/b><\/span><\/span><\/span>deixa de acelerar o centro de massa do corpo<\/b><\/span><\/span><\/span> <\/b>ou sistema<\/b><\/span><\/span><\/span> em que atuam, mas <\/b><\/span><\/span><\/span>s\u00e3o <\/b><\/span><\/span><\/span>capazes de <\/b><\/span><\/span><\/span>rotacion\u00e1-lo em torno de um eixo<\/b><\/span><\/span><\/span>. <\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

Assim, <\/b><\/span><\/span><\/span>s\u00e3o muitos<\/b><\/span><\/span><\/span> <\/b>os casos no nosso dia<\/b><\/span><\/span><\/span> a dia que <\/b><\/span><\/span><\/span>servem como exemplo de bin\u00e1rio.<\/b><\/span><\/span><\/span> <\/b>Analise as op\u00e7\u00f5es a seguir.<\/b><\/span><\/span><\/span><\/p>\n

I –<\/b><\/span><\/span><\/span> Saca-rolhas de garrafa de vinho e agulha magn\u00e9tica de uma b\u00fassola.<\/b><\/span><\/span><\/span><\/p>\n

II –<\/b><\/span><\/span><\/span> Torneira de lavat\u00f3rio e tampa de garrafa pl\u00e1stica de refrigerante.<\/b><\/span><\/span><\/span><\/p>\n

III –<\/b><\/span><\/span><\/span> Tampa de pasta de dentes e l\u00e2mpadas incandescentes.<\/b><\/span><\/span><\/span><\/p>\n

IV –<\/b><\/span><\/span><\/span> Avenidas paralelas de tr\u00e2nsito de ve\u00edculos e ma\u00e7aneta de uma porta.<\/b><\/span><\/span><\/span><\/p>\n

Apresenta(m) possibilidade de ocorr\u00eancia do bin\u00e1rio somente o(s) item(ns):<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

03-(UNIFOR-CE-015)<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

Ao <\/b><\/span><\/span>penetrar<\/b><\/span><\/span><\/span> em um <\/b><\/span><\/span>campo magn\u00e9tico uniforme \"\"<\/b><\/span><\/span><\/span>, uma <\/b><\/span><\/span>part\u00edcula de carga el\u00e9trica Q<\/b><\/span><\/span><\/span> e <\/b><\/span><\/span>massa M<\/b><\/span><\/span><\/span><\/p>\n

fica <\/b><\/span><\/span>sujeita a uma for\u00e7a magn\u00e9tica perpendicular a sua trajet\u00f3ria<\/b><\/span><\/span><\/span>, conforme a figura abaixo.<\/b><\/span><\/span><\/p>\n

\"\"<\/p>\n

De acordo com <\/b><\/span><\/span>este comportamento<\/b><\/span><\/span><\/span>, o <\/b><\/span><\/span>movimento<\/b><\/span><\/span><\/span> desta part\u00edcula ser\u00e1 <\/b><\/span><\/span>circular uniforme de raio R.<\/b><\/span><\/span><\/span><\/p>\n

Podemos afirmar que a <\/b><\/span><\/span>express\u00e3o do raio da trajet\u00f3ria desta part\u00edcula ser\u00e1:<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

\u00a0<\/span><\/p>\n

04-(UNIFOR-CE-015)<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

Para determinar a <\/b><\/span><\/span>densidade<\/b><\/span><\/span><\/span> de um <\/b><\/span><\/span>\u00f3leo lubrificante<\/b><\/span><\/span><\/span>, o engenheiro realizou um experimento<\/b><\/span><\/span><\/p>\n

no canteiro de obra, utilizando um <\/b><\/span><\/span>corpo de massa 100,0 g e volume 2,0.10<\/b><\/span><\/span><\/span>2<\/b><\/span><\/span><\/sup><\/span> cm<\/b><\/span><\/span><\/span>3<\/b><\/span><\/span><\/sup><\/span>, colocando-o em<\/b><\/span><\/span><\/p>\n

equil\u00edbrio <\/b><\/span><\/span><\/span>no interior do \u00f3leo<\/b><\/span><\/span><\/span>, <\/b><\/span><\/span>preso por dois fios<\/b><\/span><\/span><\/span> inextens\u00edveis de <\/b><\/span><\/span>tens\u00e3o individual de 6,0N,<\/b><\/span><\/span><\/span><\/p>\n

conforme <\/b><\/span><\/span>figura <\/b><\/span><\/span><\/span>abaixo. <\/b><\/span><\/span><\/p>\n

\"\"<\/p>\n

Considere a <\/b><\/span><\/span>acelera\u00e7\u00e3o da gravidade 10,0 m\/s<\/b><\/span><\/span><\/span>2<\/b><\/span><\/span><\/sup><\/span>, e assinale a <\/b><\/span><\/span>op\u00e7\u00e3o em que indica o valor<\/b><\/span><\/span><\/span> encontrado pelo profissional, no <\/b><\/span><\/span>sistema internacional de unidades.<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

05-(UNIFOR-CE-015)<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

Ve\u00edculo el\u00e9trico<\/b><\/span><\/span><\/span> pessoal pode ser guardado na <\/b><\/span><\/span>mochila.<\/b><\/span><\/span><\/span><\/p>\n

Engenheiros baianos<\/b><\/span><\/span><\/span> est\u00e3o lan\u00e7ando um <\/b><\/span><\/span>ve\u00edculo pessoal<\/b><\/span><\/span><\/span> que vira uma <\/b><\/span><\/span>mochila<\/b><\/span><\/span><\/span> para que seu dono possa lev\u00e1-lo consigo, <\/b><\/span><\/span>dispensando o estacionamento<\/b><\/span><\/span><\/span>. O <\/b><\/span><\/span>ve\u00edculo-mochila-el\u00e9trico, ou Movpak<\/b><\/span><\/span><\/span>, \u00e9 uma esp\u00e9cie de <\/b><\/span><\/span>skate motorizado, capaz de alcan\u00e7ar 24,0 km\/h. <\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

O ve\u00edculo el\u00e9trico tem uma <\/b><\/span><\/span>autonomia de 14,0 km, e suas baterias podem ser recarregadas em 2<\/b><\/span><\/span><\/span><\/p>\n

horas<\/b><\/span><\/span><\/span>. Uma vez guardado na mochila, o Movpak <\/b><\/span><\/span>pesa 7,7 kg.<\/b><\/span><\/span><\/span><\/p>\n

Um <\/b><\/span><\/span>aventureiro<\/b><\/span><\/span><\/span> resolve fazer uma viajem de <\/b><\/span><\/span>70,0 km <\/b><\/span><\/span><\/span>no seu Movpak, <\/b><\/span><\/span>partindo <\/b><\/span><\/span><\/span>de sua cidade <\/b><\/span><\/span>\u00e0s 5 h<\/b><\/span><\/span><\/span> de um s\u00e1bado. Sabe-se que ele, neste deslocamento, manteve o Movpak com <\/b><\/span><\/span>velocidade constante de<\/b><\/span><\/span><\/span> <\/b>20,0 km\/h,<\/b><\/span><\/span><\/span> obedecendo \u00e0 <\/b><\/span><\/span>autonomia de 14,0 km<\/b><\/span><\/span><\/span> e o <\/b><\/span><\/span>tempo de recarga das baterias de 2 h<\/b><\/span><\/span><\/span>. <\/b><\/span><\/span>Nessas condi\u00e7\u00f5es<\/b><\/span><\/span><\/span>, o <\/b><\/span><\/span>ve\u00edculo e seu condutor chegaram ao destino<\/b><\/span><\/span><\/span> \u00e0s:<\/b><\/span><\/span><\/p>\n

\"\"<\/p>\n

<\/h2>\n

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

A\u00a0Universidade de Fortaleza\u00a0(UNIFOR) \u00e9 uma\u00a0institui\u00e7\u00e3o de ensino superior\u00a0brasileira\u00a0e\u00a0entidade privada filantr\u00f3pica\u00a0localizada noBairro Edson Queiroz\u00a0em\u00a0Fortaleza\u00a0no estado do\u00a0Cear\u00e1, na\u00a0Av. Washington Soares. Surgiu em\u00a01973, fundada pelo grupo\u00a0Grupo Edson Queiroz, por iniciativa do pr\u00f3prio\u00a0Edson Queiroz.1 01-(UNIFOR-CE-015) O espelho c\u00f4ncavo \u00e9 caracterizado como sendo uma superf\u00edcie curva onde a parte interna \u00e9 refletora. Comumente os espelhos c\u00f4ncavos s\u00e3o utilizados em telesc\u00f3pios, projetores e tamb\u00e9m s\u00e3o encontrados<\/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-833","page","type-page","status-publish","hentry"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages\/833","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=833"}],"version-history":[{"count":2,"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages\/833\/revisions"}],"predecessor-version":[{"id":837,"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages\/833\/revisions\/837"}],"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=833"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}