{"id":238,"date":"2014-12-04T22:22:13","date_gmt":"2014-12-04T22:22:13","guid":{"rendered":"http:\/\/fisicaevestibular.com.br\/novo\/?page_id=238"},"modified":"2024-09-02T17:01:24","modified_gmt":"2024-09-02T17:01:24","slug":"resolucao-da-unesp-2015","status":"publish","type":"page","link":"https:\/\/fisicaevestibular.com.br\/novo\/universidades-2015\/exercicios-da-unesp-2015\/resolucao-da-unesp-2015\/","title":{"rendered":"Resolu\u00e7\u00e3o da UNESP 2015"},"content":{"rendered":"

Resolu\u00e7\u00f5es<\/b><\/span><\/span><\/span><\/p>\n

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

\"\"<\/p>\n

\"\"<\/p>\n

\"\"<\/p>\n

02- <\/b><\/span><\/span><\/span>C\u00e1lculo da <\/b><\/span><\/span><\/span>massa de \u00e1gua escoada <\/b><\/span><\/span><\/span>(indica\u00e7\u00e3o da balan\u00e7a) pelo <\/b><\/span><\/span><\/span>gr\u00e1fico 2, <\/b><\/span><\/span><\/span>(esquema abaixo):<\/b><\/span><\/span><\/span><\/p>\n

Observe que, <\/b><\/span><\/span><\/span>antes de ecoar a \u00e1gua (t=0<\/b><\/span><\/span><\/span>), recipiente <\/b><\/span><\/span><\/span>B vazio<\/b><\/span><\/span><\/span>, a balan\u00e7a indicava sua massa<\/b><\/span><\/span><\/span><\/p>\n

m<\/b><\/span><\/span><\/span>i<\/b><\/span><\/span><\/sub><\/span>= 0,20kg.<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

Depois que toda \u00e1gua foi escoada (t=t\u2019), <\/b><\/span><\/span><\/span>a balan\u00e7a passou a indicar <\/b><\/span><\/span><\/span>m<\/b><\/span><\/span><\/span>f<\/b><\/span><\/span><\/sub><\/span>= 1,16kg.<\/b><\/span><\/span><\/span><\/p>\n

Ent\u00e3o a <\/b><\/span><\/span><\/span>massa <\/b><\/span><\/span><\/span>total de <\/b><\/span><\/span><\/span>\u00e1gua escoada foi\u2206m <\/b><\/span><\/span><\/span>= 1,16 \u2013 0,20 <\/b><\/span><\/span><\/span>= 0,96 kg.<\/b><\/span><\/span><\/span><\/p>\n

C\u00e1lculo da <\/b><\/span><\/span><\/span>deforma\u00e7\u00e3o \u2206X <\/b><\/span><\/span><\/span>da mola, provocada pela massa <\/b><\/span><\/span><\/span>m=0,96kg de <\/b><\/span><\/span><\/span>\u00e1gua no<\/b><\/span><\/span><\/span>recipiente R, <\/b><\/span><\/span><\/span>desde <\/b><\/span><\/span><\/span>t=0 <\/b><\/span><\/span><\/span>(totalmente cheio) a <\/b><\/span><\/span><\/span>t=t\u2019<\/b><\/span><\/span><\/span>(totalmente vazio), analisando o <\/b><\/span><\/span><\/span>gr\u00e1fico 1:<\/b><\/span><\/span><\/span><\/p>\n

Veja que, <\/b><\/span><\/span><\/span>quando t=0, <\/b><\/span><\/span><\/span>a deforma\u00e7\u00e3o da mola \u00e9 m\u00e1xima e vale <\/b><\/span><\/span><\/span>L<\/b><\/span><\/span><\/span>i<\/b><\/span><\/span><\/sub><\/span> =0,20m <\/b><\/span><\/span><\/span>e que, quando <\/b><\/span><\/span><\/span>t=t\u2019, <\/b><\/span><\/span><\/span>a <\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

deforma\u00e7\u00e3o da mola \u00e9 m\u00ednima e vale <\/b><\/span><\/span><\/span>L<\/b><\/span><\/span><\/span>f<\/b><\/span><\/span><\/sub><\/span>=0,12m.<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

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

\"\"<\/p>\n

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

\"\"<\/p>\n

\"\"<\/p>\n

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

\"\"<\/p>\n

06- <\/b><\/span><\/span><\/span>A imagem <\/b><\/span><\/span><\/span>s\u00f3 ser\u00e1 real e menor que o objeto,<\/b><\/span><\/span><\/span> que o enunciado pede, quando o <\/b><\/span><\/span><\/span>objeto estiver antes do ponto antiprincipal objeto A<\/b><\/span><\/span><\/span>o<\/b><\/span><\/span><\/sub><\/span> (que \u00e9 o dobro do foco objeto f<\/b><\/span><\/span><\/span>o<\/b><\/span><\/span><\/sub><\/span>) \u201cesquema abaixo\u201d.<\/b><\/span><\/span><\/span><\/p>\n

Lente convergente<\/b><\/span><\/span><\/span><\/p>\n

1<\/b><\/span><\/span><\/span>o<\/b><\/span><\/span><\/sup><\/span> caso: Objeto P antes de A<\/b><\/span><\/span><\/span>o<\/b><\/span><\/span><\/sub><\/span><\/p>\n

\"\"<\/p>\n

Caracter\u00edsticas da imagem P\u2019:<\/b><\/span><\/span><\/span><\/p>\n

Natureza <\/b><\/span><\/span><\/span>\u2013 <\/b><\/span><\/span><\/span>Real<\/b><\/span><\/span><\/span>(obtida no cruzamento do pr\u00f3prio raio luminoso (linha cheia)<\/b><\/span><\/span><\/span><\/p>\n

Localiza\u00e7\u00e3o <\/b><\/span><\/span><\/span>\u2013 <\/b><\/span><\/span><\/span>entre F<\/b><\/span><\/span><\/span>i<\/b><\/span><\/span><\/sub><\/span>e A<\/b><\/span><\/span><\/span>i<\/b><\/span><\/span><\/sub><\/span><\/p>\n

Tamanho e orienta\u00e7\u00e3o<\/b><\/span><\/span><\/span> \u2013 <\/b><\/span><\/span><\/span>menor <\/b><\/span><\/span><\/span>que o objeto e <\/b><\/span><\/span><\/span>invertida<\/b><\/span><\/span><\/span> em rela\u00e7\u00e3o ao mesmo<\/b><\/span><\/span><\/span><\/p>\n

2<\/b><\/span><\/span><\/span>o<\/b><\/span><\/span><\/sup><\/span> caso: Objeto P sobre A<\/b><\/span><\/span><\/span>o<\/b><\/span><\/span><\/sub><\/span><\/p>\n

\"\"<\/p>\n

Caracter\u00edsticas da imagem P\u2019:<\/b><\/span><\/span><\/span><\/p>\n

Natureza \u2013 real<\/b><\/span><\/span><\/span><\/p>\n

Localiza\u00e7\u00e3o \u2013 sob A<\/b><\/span><\/span><\/span>i<\/b><\/span><\/span><\/sub><\/span><\/p>\n

Tamanho e orienta\u00e7\u00e3o<\/b><\/span><\/span><\/span> \u2013 <\/b><\/span><\/span><\/span>mesmo tamanho que o do objeto e invertida<\/b><\/span><\/span><\/span> em rela\u00e7\u00e3o a ele.<\/b><\/span><\/span><\/span><\/p>\n

Observe acima que, <\/b><\/span><\/span><\/span>quando o objeto se aproxima de A<\/b><\/span><\/span><\/span>o<\/b><\/span><\/span><\/sub><\/span> a imagem aumenta<\/b><\/span><\/span><\/span> (passou de menor para mesmo tamanho) e se <\/b><\/span><\/span><\/span>afastada lente<\/b><\/span><\/span><\/span>, sendo sempre real e invertida.<\/b><\/span><\/span><\/span><\/p>\n

Assim, como, pelo enunciado, <\/b><\/span><\/span><\/span>voc\u00ea deseja manter a imagem focalizada sobre o plano do CCD<\/b><\/span><\/span><\/span> e, <\/b><\/span><\/span><\/span>como o objeto se move para a direita<\/b><\/span><\/span><\/span>, voc\u00ea deve <\/b><\/span><\/span><\/span>deslocar a objetiva (lente) para aesquerda.<\/b><\/span><\/span><\/span><\/p>\n

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

07- <\/b><\/span><\/span><\/span>Refra\u00e7\u00e3o<\/b><\/span><\/span><\/span> \u00e9 um fen\u00f4meno que ocorre quando <\/b><\/span><\/span><\/span>uma onda deixa um meio com certa caracter\u00edstica <\/b><\/span><\/span><\/span>e entra em outro, com <\/b><\/span><\/span><\/span>caracter\u00edstica diferente, variando sua velocidade. <\/b><\/span><\/span><\/span>No caso da luz, a <\/b><\/span><\/span><\/span>caracter\u00edstica do meio que importa \u00e9 o \u00edndice de refra\u00e7\u00e3o. <\/b><\/span><\/span><\/span>E no caso de <\/b><\/span><\/span><\/span>uma onda no mar<\/b><\/span><\/span><\/span> pr\u00f3ximo \u00e0s praias a <\/b><\/span><\/span><\/span>caracter\u00edstica do meio <\/b><\/span><\/span><\/span>que importa \u00e9 a profundidade da \u00e1gua, fazendo <\/b><\/span><\/span><\/span>variar a velocidade de propaga\u00e7\u00e3o.<\/b><\/span><\/span><\/span><\/p>\n

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

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

\"\"<\/p>\n

09- <\/b><\/span><\/span><\/span>Pelo <\/b><\/span><\/span><\/span>enunciado, <\/b><\/span><\/span><\/span>ap\u00f3s a colis\u00e3o no ponto T, a bola <\/b><\/span><\/span><\/span>segue em linha reta at\u00e9 a ca\u00e7apa D<\/b><\/span><\/span><\/span>e desprezando as dimens\u00f5es da tabela, voc\u00ea obter\u00e1 a <\/b><\/span><\/span><\/span>figura abaixo:<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

Prolongando TD e PB<\/b><\/span><\/span><\/span>, na intersec\u00e7\u00e3o dos mesmos voc\u00ea obter\u00e1 <\/b><\/span><\/span><\/span>P\u2019 <\/b><\/span><\/span><\/span>e, sendo os tri\u00e2ngulos <\/b><\/span><\/span><\/span>TBP e TBP\u2019<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

semelhantes, a P\u2019B valer\u00e1 <\/b><\/span><\/span><\/span>P\u2019B=1,5m <\/b><\/span><\/span><\/span>(figura da esquerda acima).<\/b><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

10- <\/span><\/span><\/span><\/span><\/p>\n

\"\"<\/p>\n

\"\"<\/p>\n

 <\/p>\n

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

Resolu\u00e7\u00f5es 01- 02- C\u00e1lculo da massa de \u00e1gua escoada (indica\u00e7\u00e3o da balan\u00e7a) pelo gr\u00e1fico 2, (esquema abaixo): Observe que, antes de ecoar a \u00e1gua (t=0), recipiente B vazio, a balan\u00e7a indicava sua massa mi= 0,20kg. Depois que toda \u00e1gua foi escoada (t=t\u2019), a balan\u00e7a passou a indicar mf= 1,16kg. Ent\u00e3o a massa total de \u00e1gua escoada foi\u2206m = 1,16 \u2013<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":236,"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-238","page","type-page","status-publish","hentry"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages\/238","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=238"}],"version-history":[{"count":1,"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages\/238\/revisions"}],"predecessor-version":[{"id":239,"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages\/238\/revisions\/239"}],"up":[{"embeddable":true,"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/pages\/236"}],"wp:attachment":[{"href":"https:\/\/fisicaevestibular.com.br\/novo\/wp-json\/wp\/v2\/media?parent=238"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}