{"id":17038,"date":"2024-09-21T17:18:21","date_gmt":"2024-09-21T20:18:21","guid":{"rendered":"https:\/\/xequematenem.com.br\/blog\/?p=17038"},"modified":"2024-09-21T17:18:22","modified_gmt":"2024-09-21T20:18:22","slug":"questao-77-enem-2016","status":"publish","type":"post","link":"https:\/\/xequematenem.com.br\/blog\/questao-77-enem-2016\/","title":{"rendered":"Quest\u00e3o 077 &#8211;\u00a0 ENEM 2016"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">O trilho de ar \u00e9 um dispositivo utilizado em laborat\u00f3rios de f\u00edsica para analisar movimentos em que corpos de prova (carrinhos) podem se mover com atrito desprez\u00edvel. A figura ilustra um trilho horizontal com dois carrinhos (1 e 2) em que se realiza um experimento para obter a massa do carrinho 2. No instante em que o carrinho 1, de massa 150,0 g, passa a se mover com velocidade escalar constante, o carrinho 2 est\u00e1 em repouso. No momento em que o carrinho 1 se choca com o carrinho 2, ambos passam a se movimentar juntos com velocidade escalar constante. Os sensores eletr\u00f4nicos distribu\u00eddos ao longo do trilho determinam as posi\u00e7\u00f5es e registram os instantes associados \u00e0 passagem de cada carrinho, gerando os dados do quadro.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"742\" height=\"291\" src=\"https:\/\/xequematenem.com.br\/blog\/wp-content\/uploads\/2024\/09\/image-694.png\" alt=\"\" class=\"wp-image-17039\" title=\"\" srcset=\"https:\/\/xequematenem.com.br\/blog\/wp-content\/uploads\/2024\/09\/image-694.png 742w, https:\/\/xequematenem.com.br\/blog\/wp-content\/uploads\/2024\/09\/image-694-300x118.png 300w\" sizes=\"(max-width: 742px) 100vw, 742px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Com base nos dados experimentais, o valor da massa do carrinho 2 \u00e9 igual a&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A) 50,0 g.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B) 250,0 g.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C) 300,0 g.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">D) 450,0 g.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">E) 600,0 g.<\/p>\n\n\n\n<p class=\"has-text-align-center has-large-font-size wp-block-paragraph\"><strong>Solu\u00e7\u00e3o<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Em colis\u00f5es devemos usar o momento linear para saber as velocidades de cada ve\u00edculo, o momento linear \u00e9 dado por:<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"81\" height=\"32\" data-src=\"https:\/\/xequematenem.com.br\/blog\/wp-content\/uploads\/2024\/09\/image-695.png\" alt=\"\" class=\"wp-image-17040 lazyload\" title=\"\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 81px; --smush-placeholder-aspect-ratio: 81\/32;\"><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Antes da colis\u00e3o temos que&nbsp;<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"129\" height=\"28\" data-src=\"https:\/\/xequematenem.com.br\/blog\/wp-content\/uploads\/2024\/09\/image-697.png\" alt=\"\" class=\"wp-image-17042 lazyload\" title=\"\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 129px; --smush-placeholder-aspect-ratio: 129\/28;\"><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">E ap\u00f3s a colis\u00e3o, como ambos os carros andam juntos eles possuem ent\u00e3o a mesma velocidade&nbsp;<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"202\" height=\"56\" data-src=\"https:\/\/xequematenem.com.br\/blog\/wp-content\/uploads\/2024\/09\/image-698.png\" alt=\"\" class=\"wp-image-17043 lazyload\" title=\"\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 202px; --smush-placeholder-aspect-ratio: 202\/56;\"><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Sabendo que em uma colis\u00e3o \u0394p=0 , ent\u00e3o<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"213\" height=\"209\" data-src=\"https:\/\/xequematenem.com.br\/blog\/wp-content\/uploads\/2024\/09\/image-699.png\" alt=\"\" class=\"wp-image-17044 lazyload\" title=\"\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 213px; --smush-placeholder-aspect-ratio: 213\/209;\"><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">De acordo com a tabela, o carrinho 1 percorre, em MRU, uma dist\u00e2ncia de 15 cm em um<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">intervalo de tempo de 1 segundo. Portanto<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"233\" height=\"123\" data-src=\"https:\/\/xequematenem.com.br\/blog\/wp-content\/uploads\/2024\/09\/image-700.png\" alt=\"\" class=\"wp-image-17045 lazyload\" title=\"\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 233px; --smush-placeholder-aspect-ratio: 233\/123;\"><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">E a velocidade final de acordo com a tabela, temos:<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"225\" height=\"56\" data-src=\"https:\/\/xequematenem.com.br\/blog\/wp-content\/uploads\/2024\/09\/image-702.png\" alt=\"\" class=\"wp-image-17047 lazyload\" title=\"\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 225px; --smush-placeholder-aspect-ratio: 225\/56;\"><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Substituindo os valores:&nbsp;<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"249\" height=\"157\" data-src=\"https:\/\/xequematenem.com.br\/blog\/wp-content\/uploads\/2024\/09\/image-701.png\" alt=\"\" class=\"wp-image-17046 lazyload\" title=\"\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 249px; --smush-placeholder-aspect-ratio: 249\/157;\"><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Alternativa C<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>O trilho de ar \u00e9 um dispositivo utilizado em laborat\u00f3rios de f\u00edsica para analisar movimentos em que corpos de prova (carrinhos) podem se mover com atrito desprez\u00edvel. A figura ilustra um trilho horizontal com dois carrinhos (1 e 2) em que se realiza um experimento para obter a massa do carrinho 2. No instante em [&hellip;]<\/p>\n","protected":false},"author":11,"featured_media":17039,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[17,23],"tags":[],"area-do-conhecimento":[116,121],"assunto":[],"class_list":["post-17038","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-questoes-do-enem","category-23","area-do-conhecimento-ciencias-da-natureza-e-suas-tecnologias","area-do-conhecimento-fisica"],"_links":{"self":[{"href":"https:\/\/xequematenem.com.br\/blog\/wp-json\/wp\/v2\/posts\/17038","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/xequematenem.com.br\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/xequematenem.com.br\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/xequematenem.com.br\/blog\/wp-json\/wp\/v2\/users\/11"}],"replies":[{"embeddable":true,"href":"https:\/\/xequematenem.com.br\/blog\/wp-json\/wp\/v2\/comments?post=17038"}],"version-history":[{"count":1,"href":"https:\/\/xequematenem.com.br\/blog\/wp-json\/wp\/v2\/posts\/17038\/revisions"}],"predecessor-version":[{"id":17048,"href":"https:\/\/xequematenem.com.br\/blog\/wp-json\/wp\/v2\/posts\/17038\/revisions\/17048"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/xequematenem.com.br\/blog\/wp-json\/wp\/v2\/media\/17039"}],"wp:attachment":[{"href":"https:\/\/xequematenem.com.br\/blog\/wp-json\/wp\/v2\/media?parent=17038"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/xequematenem.com.br\/blog\/wp-json\/wp\/v2\/categories?post=17038"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/xequematenem.com.br\/blog\/wp-json\/wp\/v2\/tags?post=17038"},{"taxonomy":"area-do-conhecimento","embeddable":true,"href":"https:\/\/xequematenem.com.br\/blog\/wp-json\/wp\/v2\/area-do-conhecimento?post=17038"},{"taxonomy":"assunto","embeddable":true,"href":"https:\/\/xequematenem.com.br\/blog\/wp-json\/wp\/v2\/assunto?post=17038"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}