{"id":739,"date":"2015-05-12T20:02:14","date_gmt":"2015-05-12T20:02:14","guid":{"rendered":"http:\/\/fisicaevestibular.com.br\/novo\/?page_id=739"},"modified":"2024-09-03T13:23:07","modified_gmt":"2024-09-03T13:23:07","slug":"exercicios-resolvidos-uss-2-2015","status":"publish","type":"page","link":"https:\/\/fisicaevestibular.com.br\/novo\/universidades-2015\/exercicios-resolvidos-uss-2-2015\/","title":{"rendered":"Exercicios Resolvidos USS – 2 2015"},"content":{"rendered":"

\"\"<\/p>\n

A<\/b><\/span><\/span><\/span>\u00a0Universidade Severino Sombra (USS)\u00a0\u00e9 uma\u00a0universidade\u00a0privada localizada na cidade de\u00a0Vassouras, na regi\u00e3o Sul Fluminense do estado do\u00a0Rio de Janeiro. \u00c9 uma institui\u00e7\u00e3o sem fins lucrativos, tendo como sua mantenedora a\u00a0Funda\u00e7\u00e3o Educacional Severino Sombra.<\/b><\/span><\/span><\/span><\/p>\n

Todas as instala\u00e7\u00f5es da Universidade: Campus, hospital, centro esportivo e campus experimental ficam em um raio de at\u00e9 tr\u00eas quil\u00f4metros nos entornos de Vassouras, garantindo enorme facilidade no deslocamento do aluno.<\/b><\/span><\/span><\/span><\/p>\n

A Universidade Severino Sombra coloca \u00e0 disposi\u00e7\u00e3o do aluno laborat\u00f3rios de pr\u00e1ticas de \u00faltima gera\u00e7\u00e3o, salas climatizadas, biblioteca informatizada, al\u00e9m de cl\u00ednica odontol\u00f3gica, cl\u00ednica veterin\u00e1ria e hospital pr\u00f3prios.<\/b><\/span><\/span><\/span><\/p>\n

01-(USS-RJ-015)<\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

A <\/b><\/span><\/span><\/span>velocidade<\/b><\/span><\/span><\/span> de uma <\/b><\/span><\/span><\/span>composi\u00e7\u00e3o metrovi\u00e1ria<\/b><\/span><\/span><\/span>, entre <\/b><\/span><\/span><\/span>duas esta\u00e7\u00f5es consecutivas<\/b><\/span><\/span><\/span>, varia em fun\u00e7\u00e3o do <\/b><\/span><\/span><\/span>tempo<\/b><\/span><\/span><\/span> do percurso, conforme representado no gr\u00e1fico<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

A <\/b><\/span><\/span><\/span>dist\u00e2ncia<\/b><\/span><\/span><\/span> entre essas <\/b><\/span><\/span><\/span>duas esta\u00e7\u00f5es consecutivas<\/b><\/span><\/span><\/span> \u00e9, em <\/b><\/span><\/span><\/span>metros<\/b><\/span><\/span><\/span>, igual a: <\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

02-(USS-RJ-015)<\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

Em uma ind\u00fastria, <\/b><\/span><\/span><\/span>2,6.10<\/b><\/span><\/span><\/span>6<\/b><\/span><\/span><\/sup><\/span> kJ<\/b><\/span><\/span><\/span> s\u00e3o obtidos na combust\u00e3o completa de uma determinada massa de etanol. Essa <\/b><\/span><\/span><\/span>energia<\/b><\/span><\/span><\/span> \u00e9 utilizada para o <\/b><\/span><\/span><\/span>aquecimento de 10<\/b><\/span><\/span><\/span>4<\/b><\/span><\/span><\/sup><\/span> kg de \u00e1gua<\/b><\/span><\/span><\/span>, da <\/b><\/span><\/span><\/span>temperatura inicial de<\/b><\/span><\/span><\/span> <\/b><\/p>\n

\"\"<\/p>\n

20<\/b><\/span><\/span><\/span>o<\/b><\/span><\/span><\/sup><\/span>C at\u00e9 a temperatura \u03b8<\/b><\/span><\/span><\/span>. Considere o <\/b><\/span><\/span><\/span>calor espec\u00edfico da \u00e1gua = 4 kJ.kg<\/b><\/span><\/span><\/span>-1<\/b><\/span><\/span><\/sup><\/span>.\u00b0C<\/b><\/span><\/span><\/span>-1<\/b><\/span><\/span><\/sup><\/span>.<\/b><\/span><\/span><\/span><\/p>\n

Admita que <\/b><\/span><\/span><\/span>toda a energia liberada no processo de combust\u00e3o tenha sido absorvida pela \u00e1gua<\/b><\/span><\/span><\/span>. A <\/b><\/span><\/span><\/span>temperatura \u03b8<\/b><\/span><\/span><\/span> atingida <\/b><\/span><\/span><\/span>pela massa de \u00e1gua, em \u00b0C<\/b><\/span><\/span><\/span>, corresponde a: <\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

03-(USS-RJ-015)<\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

As <\/b><\/span><\/span><\/span>curvas caracter\u00edsticas<\/b><\/span><\/span><\/span> de <\/b><\/span><\/span><\/span>dois resistores, A e B<\/b><\/span><\/span><\/span>, est\u00e3o indicadas abaixo. Um <\/b><\/span><\/span><\/span>resistor equivalente<\/b><\/span><\/span><\/span> <\/b><\/p>\n

\"\"<\/p>\n

aos resistores A e B<\/b><\/span><\/span><\/span>, quando associados em <\/b><\/span><\/span><\/span>s\u00e9rie, tem, em ohms,<\/b><\/span><\/span><\/span> o seguinte valor: <\/b><\/span><\/span><\/span><\/p>\n

(A)<\/b><\/span><\/span><\/span> 5,5 <\/b><\/span><\/span><\/span>(B) <\/b><\/span><\/span><\/span>6,0 <\/b><\/span><\/span><\/span>(C)<\/b><\/span><\/span><\/span> 7,0 <\/b><\/span><\/span><\/span>(D)<\/b><\/span><\/span><\/span> 7,5<\/b><\/span><\/span><\/span><\/p>\n

04-(USS-RJ-015)<\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

Uma <\/b><\/span><\/span><\/span>moderna aeronave<\/b><\/span><\/span><\/span> comercial voa a uma <\/b><\/span><\/span><\/span>altitude de 11000 m em rela\u00e7\u00e3o \u00e0 superf\u00edcie da Terra,<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/span><\/p>\n

com <\/b><\/span><\/span><\/span>velocidade constante aproximada de 250 m\/s<\/b><\/span><\/span><\/span>. Em determinado instante, a <\/b><\/span><\/span><\/span>massa total da<\/b><\/span><\/span><\/span> <\/b>aeronave equivale a 80000 kg.<\/b><\/span><\/span><\/span> Considere que a <\/b><\/span><\/span><\/span>acelera\u00e7\u00e3o da gravidade seja igual a 10 m\/s<\/b><\/span><\/span><\/span>2<\/b><\/span><\/span><\/sup><\/span> .<\/b><\/span><\/span><\/span> Nessas condi\u00e7\u00f5es, a <\/b><\/span><\/span><\/span>energia mec\u00e2nica da aeronave corresponde, em joules<\/b><\/span><\/span><\/span>, a cerca de: <\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

05-(USS-RJ-015)<\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

Observe a <\/b><\/span><\/span><\/span>figura<\/b><\/span><\/span><\/span> a seguir, que mostra um <\/b><\/span><\/span><\/span>sistema<\/b><\/span><\/span><\/span> composto pelos <\/b><\/span><\/span><\/span>blocos 1 e 2, uma trava T sobre<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

uma mesa e uma polia<\/b><\/span><\/span><\/span>. Devido <\/b><\/span><\/span><\/span>\u00e0 trava T<\/b><\/span><\/span><\/span>, os <\/b><\/span><\/span><\/span>dois blocos<\/b><\/span><\/span><\/span> est\u00e3o inicialmente em <\/b><\/span><\/span><\/span>repouso<\/b><\/span><\/span><\/span>. Ao ser <\/b><\/span><\/span><\/span>retirada a trava, o bloco 1 percorre 90 cm em 3,0 s.<\/b><\/span><\/span><\/span> Admita que os <\/b><\/span><\/span><\/span>atritos e as massas da polia<\/b><\/span><\/span><\/span> e do <\/b><\/span><\/span><\/span>fio s\u00e3o desprez\u00edveis e que g = 10 m\/s<\/b><\/span><\/span><\/span>2<\/b><\/span><\/span><\/sup><\/span> . A <\/b><\/span><\/span><\/span>raz\u00e3o m<\/b><\/span><\/span><\/span>1<\/b><\/span><\/span><\/sub><\/span>\/m<\/b><\/span><\/span><\/span>2<\/b><\/span><\/span><\/sub><\/span> entre as massas dos blocos 1 e 2 \u00e9<\/b><\/span><\/span><\/span> igual a:<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

<\/h2>\n

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

A\u00a0Universidade Severino Sombra (USS)\u00a0\u00e9 uma\u00a0universidade\u00a0privada localizada na cidade de\u00a0Vassouras, na regi\u00e3o Sul Fluminense do estado do\u00a0Rio de Janeiro. \u00c9 uma institui\u00e7\u00e3o sem fins lucrativos, tendo como sua mantenedora a\u00a0Funda\u00e7\u00e3o Educacional Severino Sombra. Todas as instala\u00e7\u00f5es da Universidade: Campus, hospital, centro esportivo e campus experimental ficam em um raio de at\u00e9 tr\u00eas quil\u00f4metros nos entornos de Vassouras, garantindo enorme facilidade no<\/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-739","page","type-page","status-publish","hentry"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages\/739","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=739"}],"version-history":[{"count":2,"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages\/739\/revisions"}],"predecessor-version":[{"id":743,"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages\/739\/revisions\/743"}],"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=739"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}