{"id":3935,"date":"2018-04-30T19:17:57","date_gmt":"2018-04-30T19:17:57","guid":{"rendered":"http:\/\/fisicaevestibular.com.br\/novo\/?page_id=3935"},"modified":"2024-09-04T12:24:46","modified_gmt":"2024-09-04T12:24:46","slug":"resolucao-comentada-das-questoes-de-fisica-do-colegio-naval-2017-2018","status":"publish","type":"page","link":"https:\/\/fisicaevestibular.com.br\/novo\/universidades-2018\/colegio-naval-201718\/resolucao-comentada-das-questoes-de-fisica-do-colegio-naval-2017-2018\/","title":{"rendered":"Resolu\u00e7\u00e3o comentada das quest\u00f5es de F\u00cdSICA do Col\u00e9gio Naval 2017 \u2013 2018"},"content":{"rendered":"

Resolu\u00e7\u00e3o comentada das quest\u00f5es de F\u00cdSICA do<\/b><\/span><\/span><\/span><\/p>\n

Col\u00e9gio Naval 2017 \u2013 2018<\/b><\/span><\/span><\/span><\/p>\n

01- <\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

\"\"<\/p>\n

02-<\/b><\/span><\/span><\/span><\/p>\n

a) Falsa \"\"<\/b><\/span><\/span><\/span> <\/b>\u00a0o <\/b><\/span><\/span>meio de propaga\u00e7\u00e3o deve ser <\/b><\/span><\/span><\/span>homog\u00eaneo<\/b><\/span><\/span><\/span> <\/b>e transparente conforme o <\/b><\/span><\/span><\/span>princ\u00edpio da propaga\u00e7\u00e3o retil\u00ednea da luz pode ser definido<\/b><\/span><\/span><\/span>\u00a0como:\u00a0<\/b><\/span><\/span><\/span>\u201cem meios <\/b><\/span><\/span><\/span>homog\u00eaneos e transparentes<\/b><\/span><\/span><\/span> a luz se propaga em linha reta\u201d<\/b><\/span><\/span><\/span><\/p>\n

b) Correta \"\"<\/b><\/span><\/span><\/span> veja <\/b><\/span><\/span><\/span>explica\u00e7\u00e3o abaixo:<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

c) Falsa<\/b><\/span><\/span><\/span> \"\"<\/span> qualquer tipo de onda transporta energia<\/b><\/span><\/span><\/span> entre os pontos do meio, mas <\/b><\/span><\/span><\/span>n\u00e3o transporta mat\u00e9ria.<\/b><\/span><\/span><\/span><\/p>\n

d) Falsa<\/b><\/span><\/span><\/span> \"\" <\/span>na <\/b><\/span><\/span><\/span>eletriza\u00e7\u00e3o por contato, ap\u00f3s<\/b><\/span><\/span><\/span> o mesmo <\/b><\/span><\/span><\/span>os corpos ficam <\/b><\/span><\/span><\/span>com <\/b><\/span><\/span><\/span>cargas de mesmo sinal. Veja exemplo abaixo.<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

e) Falsa \"\" <\/b><\/span><\/span><\/span>os<\/b><\/span><\/span><\/span> polos s\u00e3o separados, n\u00e3o <\/b><\/span><\/span><\/span>se<\/b><\/span><\/span><\/span> superp\u00f5em. <\/b><\/span><\/span><\/span>Veja <\/b><\/span><\/span><\/span>explica\u00e7\u00e3o abaixo.<\/b><\/span><\/span><\/span><\/p>\n

Se voc\u00ea\u00a0<\/b><\/span><\/span><\/span>pendurar um im\u00e3 em forma de barra pelo seu centro\u00a0<\/b><\/span><\/span><\/span>ou\u00a0<\/b><\/span><\/span><\/span>observar a agulha magn\u00e9tica<\/b><\/span><\/span><\/span>\u00a0de uma\u00a0<\/b><\/span><\/span><\/span>b\u00fassola voc\u00ea ver\u00e1 que seus polos ficam sempre alinhados na dire\u00e7\u00e3o norte-sul.<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

O\u00a0<\/b><\/span><\/span><\/span>polo que indicar o polo norte geogr\u00e1fico\u00a0<\/b><\/span><\/span><\/span>recebe o nome de\u00a0<\/b><\/span><\/span><\/span>polo norte e estar\u00e1 indicando\u00a0<\/b><\/span><\/span><\/span>o\u00a0<\/b><\/span><\/span><\/span>polo sul magn\u00e9tico da Terra.<\/b><\/span><\/span><\/span><\/p>\n

O\u00a0<\/b><\/span><\/span><\/span>polo que indicar o polo sul geogr\u00e1fico\u00a0<\/b><\/span><\/span><\/span>recebe o nome de\u00a0<\/b><\/span><\/span><\/span>polo sul\u00a0<\/b><\/span><\/span><\/span>e estar\u00e1\u00a0<\/b><\/span><\/span><\/span>indicando o polo norte magn\u00e9tico da Terra.\u00a0<\/b><\/span><\/span><\/span>Tudo isso ocorre <\/b><\/span><\/span><\/span>porque polos de nomes opostos se atraem<\/b><\/span><\/span><\/span><\/p>\n

R- B<\/b><\/span><\/span><\/span><\/p>\n

03- <\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

04-<\/b><\/span><\/span><\/span><\/p>\n

Massa total <\/b><\/span><\/span><\/span>do carrinho <\/b><\/span><\/span><\/span>com a 4 sacas \"\"<\/b><\/span><\/span><\/span> <\/b>m =<\/b><\/span><\/span><\/span> 20 + 4.60 = 20 + 240 \"\" <\/b><\/span><\/span><\/span>m = 260 kg.<\/b><\/span><\/span><\/span><\/p>\n

Peso total \"\"<\/b><\/span><\/span><\/span> <\/b>P = m.g <\/b><\/span><\/span><\/span>= 260.10 \"\" <\/b><\/span><\/span><\/span>P = 2600 N.<\/b><\/span><\/span><\/span><\/p>\n

As <\/b><\/span><\/span><\/span>for\u00e7as <\/b><\/span><\/span><\/span>que <\/b><\/span><\/span><\/span>agem <\/b><\/span><\/span><\/span>sobre o <\/b><\/span><\/span><\/span>carrinho s\u00e3o:<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

\"\"<\/p>\n

\"\"<\/p>\n

05- <\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

06-<\/b><\/span><\/span><\/span><\/p>\n

\u00c9 claro que o <\/b><\/span><\/span><\/span>sistema CPS funciona no ar<\/b><\/span><\/span><\/span> (veja figura acima) e, assim as <\/b><\/span><\/span><\/span>lentes e os espelhos est\u00e3o imersos no ar.<\/b><\/span><\/span><\/span><\/p>\n

A <\/b><\/span><\/span><\/span>concentra\u00e7\u00e3o dos raios solares nas lentes ou espelhos s\u00f3 ocorre <\/b><\/span><\/span><\/span>no foco<\/b><\/span><\/span><\/span> dos mesmos<\/b><\/span><\/span><\/span><\/p>\n

I. Falsa \"\"<\/b><\/span><\/span><\/span> se essas lentes c\u00f4ncavas possuem <\/b><\/span><\/span><\/span>comportamento \u00f3ptico divergente <\/b><\/span><\/span><\/span>elas <\/b><\/span><\/span><\/span>divergem<\/b><\/span><\/span><\/span> e <\/b><\/span><\/span><\/span>n\u00e3o concentram os raios de luz.<\/b><\/span><\/span><\/span><\/p>\n

II. Correta \"\"<\/b><\/span><\/span><\/span> convergem, <\/b><\/span><\/span><\/span>concentram os raios de luz.<\/b><\/span><\/span><\/span><\/p>\n

III. Correta \"\"<\/b><\/span><\/span><\/span> espelhos c\u00f4ncavos podem <\/b><\/span><\/span><\/span>concentrar raios de luz <\/b><\/span><\/span><\/span>desde que a <\/b><\/span><\/span><\/span>viga esteja concentrada em seu foco.<\/b><\/span><\/span><\/span><\/p>\n

IV. Falsa \"\"<\/b><\/span><\/span><\/span> espelhos convexos <\/b><\/span><\/span><\/span>n\u00e3o concentram efetivamente os raios de luz .<\/b><\/span><\/span><\/span><\/p>\n

V. Correta \"\"<\/b><\/span><\/span><\/span> <\/b>pequena viga encontra-se no ponto focal dos espelhos e das lentes, onde se <\/b><\/span><\/span><\/span>concentram os raios de luz.<\/b><\/span><\/span><\/span><\/p>\n

R- C<\/b><\/span><\/span><\/span><\/p>\n

 <\/p>\n

Voltar para os exerc\u00edcios<\/span><\/a><\/h3>\n","protected":false},"excerpt":{"rendered":"

Resolu\u00e7\u00e3o comentada das quest\u00f5es de F\u00cdSICA do Col\u00e9gio Naval 2017 \u2013 2018 01- 02- a) Falsa \u00a0o meio de propaga\u00e7\u00e3o deve ser homog\u00eaneo e transparente conforme o princ\u00edpio da propaga\u00e7\u00e3o retil\u00ednea da luz pode ser definido\u00a0como:\u00a0\u201cem meios homog\u00eaneos e transparentes a luz se propaga em linha reta\u201d b) Correta veja explica\u00e7\u00e3o abaixo: c) Falsa qualquer tipo de onda transporta energia<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":3933,"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-3935","page","type-page","status-publish","hentry"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages\/3935","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=3935"}],"version-history":[{"count":1,"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages\/3935\/revisions"}],"predecessor-version":[{"id":3936,"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages\/3935\/revisions\/3936"}],"up":[{"embeddable":true,"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages\/3933"}],"wp:attachment":[{"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/media?parent=3935"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}