{"id":122138,"date":"2024-07-30T18:00:00","date_gmt":"2024-07-30T21:00:00","guid":{"rendered":"https:\/\/vestibulares.estrategia.com\/portal\/?p=122138"},"modified":"2024-08-05T16:18:09","modified_gmt":"2024-08-05T19:18:09","slug":"potencia","status":"publish","type":"post","link":"https:\/\/vestibulares.estrategia.com\/portal\/materias\/fisica\/potencia\/","title":{"rendered":"Pot\u00eancia: conceito, trabalho e energia\u00a0"},"content":{"rendered":"<p class=\"wp-block-paragraph\">O conceito de <span id=\"urn:enhancement-cbd9fd75-86b1-4c03-aabd-64364d713eec\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/potencia\">pot&ecirc;ncia<\/span> foi importante para diversas &aacute;reas do conhecimento e desenvolvimento tecnol&oacute;gico, como a eletricidade, funcionamento de chuveiros, m&aacute;quinas industriais, ferramentas de trabalho cotidiano, eletrodom&eacute;sticos, eletroport&aacute;teis, carros, avi&otilde;es e diversos outros equipamentos &uacute;teis para a sociedade atual.&nbsp;<p class=\"wp-block-paragraph\">Neste artigo, aprenda mais sobre a concep&ccedil;&atilde;o f&iacute;sica de <span id=\"urn:enhancement-ecc7a9fe-23fe-48c5-ad8c-c535c4c53b50\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/potencia\">pot&ecirc;ncia<\/span>, defini&ccedil;&atilde;o, f&oacute;rmulas e aplica&ccedil;&otilde;es. Veja ainda, a execu&ccedil;&atilde;o pr&aacute;tica deste estudo no cotidiano, com exemplos e tamb&eacute;m quest&otilde;es de vestibulares que abordam o tema, comentadas e resolvidas. Confira!<\/p><div id=\"ez-toc-container\" class=\"ez-toc-v2_0_86 counter-hierarchy ez-toc-counter ez-toc-transparent ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\"><p class=\"ez-toc-title\" style=\"cursor:inherit\">Navegue pelo conte\u00fado<\/p>\n<\/div><nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/vestibulares.estrategia.com\/portal\/materias\/fisica\/potencia\/#Conceito\" >Conceito<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/vestibulares.estrategia.com\/portal\/materias\/fisica\/potencia\/#Potencia-instantanea\" >Pot&ecirc;ncia instant&acirc;nea<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/vestibulares.estrategia.com\/portal\/materias\/fisica\/potencia\/#Potencia-media\" >Pot&ecirc;ncia m&eacute;dia<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/vestibulares.estrategia.com\/portal\/materias\/fisica\/potencia\/#Potencia-e-rendimento\" >Pot&ecirc;ncia e rendimento<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/vestibulares.estrategia.com\/portal\/materias\/fisica\/potencia\/#Aplicacoes-do-conceito-de-potencia\" >Aplica&ccedil;&otilde;es do conceito de pot&ecirc;ncia<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/vestibulares.estrategia.com\/portal\/materias\/fisica\/potencia\/#Questoes-de-vestibulares-sobre-potencia\" >Quest&otilde;es de vestibulares sobre pot&ecirc;ncia&nbsp;<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/vestibulares.estrategia.com\/portal\/materias\/fisica\/potencia\/#Estude-mais-com-a-Coruja\" >Estude mais com a Coruja!<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\" id=\"h-conceito\"><span class=\"ez-toc-section\" id=\"Conceito\"><\/span>Conceito<span class=\"ez-toc-section-end\"><\/span><\/h2><p class=\"wp-block-paragraph\">A <span id=\"urn:enhancement-630686c8-2ba3-4ed9-add1-be1e6726a969\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/potencia\">pot&ecirc;ncia<\/span> &eacute; uma grandeza f&iacute;sica que mensura a varia&ccedil;&atilde;o de <span id=\"urn:enhancement-828074f6-7769-4359-ada0-2bc4000f6506\" class=\"textannotation disambiguated wl-creative-work\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/energia\">energia<\/span> dentro de um aparelho ou m&aacute;quina, de <span id=\"urn:enhancement-cc06fef9-1bf9-4acb-b9f7-dae6c91f7d62\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/geometria\">forma<\/span> que indica o consumo de <span id=\"urn:enhancement-7171b082-24e5-48d8-a767-94d3851f5a19\" class=\"textannotation disambiguated wl-creative-work\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/energia\">energia<\/span> em uma unidade de tempo para realizar uma determinada tarefa.<\/p><p class=\"wp-block-paragraph\">Quanto mais potente &eacute; um aparelho, menor o tempo que ele gasta para realizar uma fun&ccedil;&atilde;o, por exemplo: em uma estrada de 5 km que tenha 30&ordm; de inclina&ccedil;&atilde;o em rela&ccedil;&atilde;o ao solo, um carro de motor mais potente poder&aacute; subir em uma velocidade de 50 km\/h, em 6 minutos.&nbsp;<\/p><p class=\"wp-block-paragraph\">J&aacute; um outro ve&iacute;culo, com motor de <span id=\"urn:enhancement-364dcad2-fd3a-4901-98fa-d0fc24125d3c\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/potencia\">pot&ecirc;ncia<\/span> inferior, gasta mais <span id=\"urn:enhancement-4a8f853e-0bec-4090-b575-ce695401ef9a\" class=\"textannotation disambiguated wl-creative-work\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/energia\">energia<\/span> para fazer o mesmo percurso e anda, como exemplo, a 25 km\/h, gastando o dobro do tempo (12 minutos).<\/p><h3 class=\"wp-block-heading\" id=\"h-formula-de-potencia-nbsp\">F&oacute;rmula de pot&ecirc;ncia&nbsp;<\/h3><p class=\"wp-block-paragraph\">Para calcular a <span id=\"urn:enhancement-8012c167-2704-4dfb-a894-76bd2ceb2891\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/potencia\">pot&ecirc;ncia<\/span> (P) de uma m&aacute;quina, &eacute; necess&aacute;rio observar o trabalho realizado por ela e considerar quanto tempo ela levou para conclu&iacute;-lo. Considere que, na f&iacute;sica, trabalho &eacute; a grandeza que dimensiona a transfer&ecirc;ncia de <span id=\"urn:enhancement-fe47cffa-f1bc-401e-9973-2f8d97d85616\" class=\"textannotation disambiguated wl-creative-work\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/energia\">energia<\/span> em um corpo, a partir da a&ccedil;&atilde;o de uma <span id=\"urn:enhancement-c918e6eb-2f14-4d24-b073-bd85c5d9f45f\" class=\"textannotation disambiguated wl-creative-work\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/forca\">for&ccedil;a<\/span>.&nbsp;<\/p><p class=\"wp-block-paragraph\">O valor do trabalho (&#120649;) indica, simplificadamente, quanta <span id=\"urn:enhancement-8c21eb11-5eb4-48f1-9bf9-89cadb5d6a8b\" class=\"textannotation disambiguated wl-creative-work\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/energia\">energia<\/span> &eacute; aplicada para realizar uma a&ccedil;&atilde;o espec&iacute;fica. A partir disso, a f&oacute;rmula que define o conceito de <span id=\"urn:enhancement-cc8cfdc2-8f95-4dd3-9c99-1119f657f77e\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/potencia\">pot&ecirc;ncia<\/span> &eacute;:<\/p><p class=\"has-text-align-center wp-block-paragraph\">P = &Delta;&#120649; \/ &Delta;t<\/p><p class=\"has-text-align-center wp-block-paragraph\">P &eacute; a <span id=\"urn:enhancement-34b0164e-84ef-4952-8555-7e3ede712fa6\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/potencia\">pot&ecirc;ncia<\/span><br>&Delta;&#120649; considera a varia&ccedil;&atilde;o do trabalho<br>&Delta;t &eacute; a varia&ccedil;&atilde;o do tempo, entre o in&iacute;cio e fim da atividade<\/p><p class=\"wp-block-paragraph\">Nos estudos da f&iacute;sica, a unidade padronizada segue os princ&iacute;pios propostos pelo Sistema Internacional de Unidades (S.I.). Para a <span id=\"urn:enhancement-75762c73-50c1-461e-a187-f75fb60e799d\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/potencia\">pot&ecirc;ncia<\/span>, as grandezas relacionadas em sua f&oacute;rmula s&atilde;o trabalho (medido em Joules, J) e o tempo (descrito em segundos,s).&nbsp;<\/p><p class=\"wp-block-paragraph\">Ent&atilde;o, a unidade padr&atilde;o da <span id=\"urn:enhancement-b2e7b0cf-db42-4114-a346-45df28e346e8\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/potencia\">pot&ecirc;ncia<\/span> equivale &agrave; Joules por segundo (J\/s), que, conforme o S.I. pode ser descrito como Watts (W), de <span id=\"urn:enhancement-26d73eb1-eacc-43e0-9fc9-7d0852e009ab\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/geometria\">forma<\/span> que W = J\/s.&nbsp;<\/p><p class=\"wp-block-paragraph\">Essa f&oacute;rmula de <span id=\"urn:enhancement-cd591b5d-8ec1-4e5b-8741-27d47adf4cc8\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/potencia\">pot&ecirc;ncia<\/span> &eacute; gen&eacute;rica, mas dentro de cada &aacute;rea da f&iacute;sica existe uma f&oacute;rmula espec&iacute;fica para calcular a <span id=\"urn:enhancement-dc0acc2e-6a56-476b-aec9-baf985e5dbb3\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/potencia\">pot&ecirc;ncia<\/span> naquele nicho. Por exemplo, a pot&ecirc;ncia el&eacute;trica pode ter uma f&oacute;rmula simplificada, por considerar as varia&ccedil;&otilde;es <span id=\"urn:enhancement-fe4c8e6d-4417-4971-a99d-0d23ac116b0b\" class=\"textannotation disambiguated wl-creative-work\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/matematica\">matem&aacute;ticas<\/span> do trabalho el&eacute;trico, corrente el&eacute;trica e outras grandezas f&iacute;sicas pr&oacute;prias dessa &aacute;rea do conhecimento. Assim como a <span id=\"urn:enhancement-82dd49ef-bf8d-41d6-88f8-414c204662f9\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/potencia\">pot&ecirc;ncia<\/span> termodin&acirc;mica, que leva em conta as particularidades da transfer&ecirc;ncia de calor para a constru&ccedil;&atilde;o da f&oacute;rmula e assim sucessivamente.&nbsp;<\/p><h2 class=\"wp-block-heading\" id=\"h-potencia-instantanea\"><span class=\"ez-toc-section\" id=\"Potencia-instantanea\"><\/span>Pot&ecirc;ncia instant&acirc;nea<span class=\"ez-toc-section-end\"><\/span><\/h2><p class=\"wp-block-paragraph\">O estudo instant&acirc;neo de um fen&ocirc;meno f&iacute;sico diz respeito &agrave;quilo que acontece em um pequeno instante, em que o espa&ccedil;o de tempo &eacute; t&atilde;o curto que &eacute; considerado desprez&iacute;vel nos c&aacute;lculos, porque &eacute; muito pr&oacute;ximo de 0.<\/p><p class=\"wp-block-paragraph\">No caso da <span id=\"urn:enhancement-88f79dd4-611a-4c00-86e0-69e8fa6bc160\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/potencia\">pot&ecirc;ncia<\/span> instant&acirc;nea, diz respeito a considerar uma m&aacute;quina em um instante x de seu funcionamento e calcular a <span id=\"urn:enhancement-259ba80e-f9ac-4d80-b1dd-a5e485748afe\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/potencia\">pot&ecirc;ncia<\/span> que ela apresenta naquele min&uacute;sculo intervalo de tempo. Nesse caso, o &Delta;t tende ao n&uacute;mero 0.&nbsp;<\/p><h2 class=\"wp-block-heading\" id=\"h-potencia-media\"><span class=\"ez-toc-section\" id=\"Potencia-media\"><\/span>Pot&ecirc;ncia m&eacute;dia<span class=\"ez-toc-section-end\"><\/span><\/h2><p class=\"wp-block-paragraph\">A <span id=\"urn:enhancement-557bb82d-a840-438f-b720-77fd42e7b90a\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/potencia\">pot&ecirc;ncia<\/span> m&eacute;dia (P<sub>m<\/sub>) de uma m&aacute;quina considera todos os valores de <span id=\"urn:enhancement-616fe25a-cad6-437a-b40d-3018d41a09a6\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/potencia\">pot&ecirc;ncia<\/span> que esse equipamento adquiriu durante uma atividade e faz uma m&eacute;dia em rela&ccedil;&atilde;o ao tempo gasto. A f&oacute;rmula utilizada para o <span id=\"urn:enhancement-9cf05f2d-27ce-4475-8eb3-6f2583794a03\" class=\"textannotation disambiguated wl-creative-work\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/calculo\">c&aacute;lculo<\/span> da P<sub>m<\/sub> &eacute;:<\/p><p class=\"has-text-align-center wp-block-paragraph\">P<sub>m<\/sub> = &#120649;\/t<\/p><p class=\"has-text-align-center wp-block-paragraph\">P<sub>m<\/sub>= <span id=\"urn:enhancement-25000078-26a4-42e9-a0ce-817703a71080\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/potencia\">pot&ecirc;ncia<\/span> m&eacute;dia<br>&#120649; = trabalho&nbsp;<br>t = tempo<\/p><p class=\"wp-block-paragraph\">Por exemplo, um dispositivo A apresenta durante um trabalho de 30 segundos uma <span id=\"urn:enhancement-d4e43a24-2095-4e66-b9e3-474cf87db9bb\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/potencia\">pot&ecirc;ncia<\/span> de 1000W durante os primeiros 15 segundos e, nos 15 segundos finais, admite <span id=\"urn:enhancement-12956a64-7c86-4dbf-9c4a-3f1174e0d5d3\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/potencia\">pot&ecirc;ncia<\/span> de 2000 W: a <span id=\"urn:enhancement-ca132792-2d6d-48ce-a041-53ea10ac5b8d\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/potencia\">pot&ecirc;ncia<\/span> m&eacute;dia foi de 1500W.<\/p><p class=\"wp-block-paragraph\">Isso significa que, se um equipamento B de <span id=\"urn:enhancement-d3d9f10b-87e5-476b-a612-933ab70e02cc\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/potencia\">pot&ecirc;ncia<\/span> constante 1500W iniciar o trabalho no mesmo tempo que A, obteremos o mesmo tempo de funcionamento, porque suas pot&ecirc;ncias m&eacute;dias ser&atilde;o iguais.&nbsp;<\/p><p class=\"wp-block-paragraph\">Essa rela&ccedil;&atilde;o entre <span id=\"urn:enhancement-c15b2763-df32-436a-abf0-f8f8dd6da031\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/potencia\">pot&ecirc;ncia<\/span>, velocidade e tempo tamb&eacute;m pode ser mensurada com a f&oacute;rmula:<\/p><p class=\"has-text-align-center wp-block-paragraph\">P = F. V<sub>m<\/sub><\/p><p class=\"has-text-align-center wp-block-paragraph\">P = <span id=\"urn:enhancement-5076bc5d-06d0-4e46-9abb-ae5e356a3724\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/potencia\">pot&ecirc;ncia<\/span>&nbsp;<br>F = <span id=\"urn:enhancement-a808e981-5a09-481b-a048-98a2894a6a84\" class=\"textannotation disambiguated wl-creative-work\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/forca\">for&ccedil;a<\/span> resultante sobre o corpo (em <span id=\"urn:enhancement-637a3927-e63e-4ca5-947a-c46d66b621b1\" class=\"textannotation disambiguated wl-person\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/isaac-newton\">Newton<\/span>)<br>V<sub>m<\/sub> = <span id=\"urn:enhancement-cb01bb4c-9d88-4dd1-946d-403f80eb5bf2\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/velocidade-media\">velocidade m&eacute;dia<\/span> da a&ccedil;&atilde;o (em metros por segundo)<\/p><p class=\"wp-block-paragraph\">Veja como as grandezas <span id=\"urn:enhancement-a471bfc4-175b-481c-a5c0-b632cf4250b2\" class=\"textannotation disambiguated wl-creative-work\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/forca\">for&ccedil;a<\/span> e <a href=\"https:\/\/vestibulares.estrategia.com\/portal\/materias\/fisica\/velocidade-escalar\/\" target=\"_blank\">velocidade <\/a>s&atilde;o diretamente proporcionais &agrave; <span id=\"urn:enhancement-0a362870-5c54-47a2-998c-3cddd3667d4a\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/potencia\">pot&ecirc;ncia<\/span> da m&aacute;quina. Quanto mais r&aacute;pido o funcionamento, maior a <span id=\"urn:enhancement-f4c7127a-a0b7-44c1-a1db-4dd0e2fb92d0\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/potencia\">pot&ecirc;ncia<\/span>, assim como, quanto maior a <span id=\"urn:enhancement-7ce6a188-2ac3-4479-8374-353449dd1e9c\" class=\"textannotation disambiguated wl-creative-work\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/forca\">for&ccedil;a<\/span> desempenhada, maior a <span id=\"urn:enhancement-2a2a1c95-da28-4701-91c9-a7b4d9d41634\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/potencia\">pot&ecirc;ncia<\/span>. E o contr&aacute;rio tamb&eacute;m &eacute; verdadeiro, quando uma m&aacute;quina n&atilde;o tem muita <span id=\"urn:enhancement-45eb55d9-1d54-4e68-b56d-7d63b19c9967\" class=\"textannotation disambiguated wl-creative-work\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/forca\">for&ccedil;a<\/span> vetorial para concluir seu trabalho, seu motor &eacute; menos potente.&nbsp;<\/p><h2 class=\"wp-block-heading\" id=\"h-potencia-e-rendimento\"><span class=\"ez-toc-section\" id=\"Potencia-e-rendimento\"><\/span>Pot&ecirc;ncia e rendimento<span class=\"ez-toc-section-end\"><\/span><\/h2><p class=\"wp-block-paragraph\">Um fato importante sobre as m&aacute;quinas da f&iacute;sica &eacute; que, embora exista um valor te&oacute;rico de <span id=\"urn:enhancement-037109af-8394-4d4e-b914-489bf8a80a24\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/potencia\">pot&ecirc;ncia<\/span> e funcionamento, na pr&aacute;tica, h&aacute; sempre uma dissipa&ccedil;&atilde;o de <span id=\"urn:enhancement-b4a1a06c-4233-4440-a837-905ebba68969\" class=\"textannotation disambiguated wl-creative-work\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/energia\">energia<\/span> durante a atividade de um equipamento.&nbsp;<\/p><p class=\"wp-block-paragraph\">Por isso h&aacute; uma diferencia&ccedil;&atilde;o entre o que &eacute; <span id=\"urn:enhancement-e6b329f5-1f73-40c2-bf1d-7db9b7a50333\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/potencia\">pot&ecirc;ncia<\/span> total do aparelho (P<sub>t<\/sub>), aquilo que o aparelho pode entregar, e a <span id=\"urn:enhancement-0866cd5e-9558-4398-99b5-195c33ac60c2\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/potencia\">pot&ecirc;ncia<\/span> &uacute;til (P<sub>u<\/sub>) que considera a <span id=\"urn:enhancement-f5488174-108d-4188-886c-26709bd2ab6d\" class=\"textannotation disambiguated wl-creative-work\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/energia\">energia<\/span> que realmente pode ser utilizada, depois das dissipa&ccedil;&otilde;es.&nbsp;<\/p><p class=\"wp-block-paragraph\">A raz&atilde;o entre a <span id=\"urn:enhancement-1771088c-7ad9-4236-a067-c236f0b27e44\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/potencia\">pot&ecirc;ncia<\/span> &uacute;til e a <span id=\"urn:enhancement-e40493e9-1763-48fb-a923-b5dc3afc34f3\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/potencia\">pot&ecirc;ncia<\/span> total de um dispositivo indica o seu rendimento (&eta;), ou seja, quanto de sua <span id=\"urn:enhancement-7b54ebfd-b48f-422b-9045-1db5abf60c81\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/potencia\">pot&ecirc;ncia<\/span> total o aparelho consegue entregar em <span id=\"urn:enhancement-a5de9e60-65a3-4778-9acc-13a6405ffd10\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/geometria\">forma<\/span> de <span id=\"urn:enhancement-ea5b8541-d878-4210-82a0-dcccf9b7fb0d\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/potencia\">pot&ecirc;ncia<\/span> &uacute;til. Quanto maior o valor dessa raz&atilde;o, mais pr&oacute;ximo de 1 e, consequentemente, mais rendimento h&aacute; no equipamento. Por outro lado, quando a divis&atilde;o tem valor baixo e pr&oacute;ximo de 0, o rendimento &eacute; baixo, e pouca parte da <span id=\"urn:enhancement-adaca9eb-04b1-4058-a56f-f798ca87ad24\" class=\"textannotation disambiguated wl-creative-work\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/energia\">energia<\/span> realmente &eacute; aproveitada.<\/p><p class=\"has-text-align-center wp-block-paragraph\">&eta; = P<sub>u<\/sub>\/P<sub>t<\/sub><\/p><p class=\"has-text-align-center wp-block-paragraph\">&eta; = rendimento, calculado de 0 a 1, pode ser descrito em porcentagem (exemplo, &eta; = 0,1 = 10%)<br>P<sub>u <\/sub>= <span id=\"urn:enhancement-341e9fd5-8085-4e87-beb4-2a019058f6e6\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/potencia\">pot&ecirc;ncia<\/span> &uacute;til<br>P<sub>t <\/sub>= <span id=\"urn:enhancement-37dea4a6-7ef5-48c6-94ad-646bef91f395\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/potencia\">pot&ecirc;ncia<\/span> &uacute;til<\/p><h2 class=\"wp-block-heading\" id=\"h-aplicacoes-do-conceito-de-potencia\"><span class=\"ez-toc-section\" id=\"Aplicacoes-do-conceito-de-potencia\"><\/span>Aplica&ccedil;&otilde;es do conceito de pot&ecirc;ncia<span class=\"ez-toc-section-end\"><\/span><\/h2><p class=\"wp-block-paragraph\">A vida como um todo depende do fluxo de <span id=\"urn:enhancement-4f79c713-985f-4289-ac53-d384a50d3226\" class=\"textannotation disambiguated wl-creative-work\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/energia\">energia<\/span> <span id=\"urn:enhancement-07783182-4bfc-4700-81c5-a582b1a0b924\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/quimica\">qu&iacute;mica<\/span>, biol&oacute;gica, f&iacute;sica, de todas as ordens poss&iacute;veis. Diante disso, o nosso pr&oacute;prio corpo aplica o conceito de <span id=\"urn:enhancement-bd102e9f-018d-4c15-9ef8-8ee381d1e31f\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/potencia\">pot&ecirc;ncia<\/span>, na transmiss&atilde;o de c&eacute;lulas <span id=\"urn:enhancement-f038b611-82ee-4df2-84c0-827544581a42\" class=\"textannotation disambiguated wl-creative-work\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/energia\">energia<\/span> entre as c&eacute;lulas, no funcionamento dos &oacute;rg&atilde;os, em uma corrida, nas atividades f&iacute;sicas em geral.&nbsp;<\/p><p class=\"wp-block-paragraph\">Al&eacute;m disso, o cotidiano moderno do s&eacute;culo XXI proporciona que muitos dos equipamentos utilizados sejam baseados nesse conceito f&iacute;sico. Os eletroeletr&ocirc;nicos em geral, dependem de pot&ecirc;ncia el&eacute;trica para o funcionamento, como os computadores, televisores, telefones e at&eacute; mesmo lanternas &agrave; pilha.&nbsp;<\/p><p class=\"wp-block-paragraph\">Em uma casa, os eletrodom&eacute;sticos, como o microondas, transformam energia el&eacute;trica em energia t&eacute;rmica a partir dos estudos de <span id=\"urn:enhancement-77f5c73d-7d65-4e36-bf41-60946aff3474\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/potencia\">pot&ecirc;ncia<\/span> e termodin&acirc;mica. O funcionamento dos carros, motocicletas, caminh&otilde;es, &ocirc;nibus, avi&otilde;es, navios passam, de uma <span id=\"urn:enhancement-8e844e4e-1363-4c23-b50a-4c2bda8feee5\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/geometria\">forma<\/span> ou outra, pela conhecimento sobre <span id=\"urn:enhancement-1f0edeaf-66b2-4631-8a50-2ee779d4d2e1\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/potencia\">pot&ecirc;ncia<\/span>. Isso faz com que esse conhecimento seja muito relevante para um cidad&atilde;o da sociedade atual, para que esteja ciente de como a vida ao seu redor ocorre.&nbsp;<\/p><h2 class=\"wp-block-heading\" id=\"h-questoes-de-vestibulares-sobre-potencia-nbsp\"><span class=\"ez-toc-section\" id=\"Questoes-de-vestibulares-sobre-potencia\"><\/span>Quest&otilde;es de vestibulares sobre pot&ecirc;ncia&nbsp;<span class=\"ez-toc-section-end\"><\/span><\/h2><p class=\"wp-block-paragraph\">FAMECA &mdash; adaptado (2021)<\/p><p class=\"wp-block-paragraph\">A Nasa realizou, em 30.05.2020, algo in&eacute;dito: um lan&ccedil;amento a partir de solo norte-americano usando uma empresa privada. Os astronautas decolaram do Cabo Canaveral, na Fl&oacute;rida, no foguete Falcon 9, da SpaceX. Dezenove horas depois, chegaram &agrave; ISS (Esta&ccedil;&atilde;o Espacial Internacional), onde fizeram, com sucesso, a acoplagem da c&aacute;psula Crew Dragon. A ISS orbita a Terra a 408 km de altura, uma dist&acirc;ncia como entre Rio de Janeiro e S&atilde;o Paulo.<\/p><p class=\"wp-block-paragraph\">Antes de entrar na c&aacute;psula Crew Dragon, os astronautas t&ecirc;m que subir em um elevador que os transporta para o bra&ccedil;o de acesso &agrave; c&aacute;psula, localizado a 81 metros do solo.<\/p><p class=\"wp-block-paragraph\">Considere que o elevador que transporta os astronautas at&eacute; o bra&ccedil;o de acesso &agrave; c&aacute;psula Crew Dragon demore 7,5 s para fazer todo o trajeto, que a massa total do elevador, incluindo os astronautas, seja de 1500 kg e que g = 10 m\/s2 no local do lan&ccedil;amento. Nessas condi&ccedil;&otilde;es, a <span id=\"urn:enhancement-f9aced8e-24c4-46c0-bfc7-ac7f9b3b5ba1\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/potencia\">pot&ecirc;ncia<\/span> m&eacute;dia &uacute;til, ou seja, aquela utilizada efetivamente para vencer a <span id=\"urn:enhancement-0e377a42-8614-468e-95b2-6e29695cfdbc\" class=\"textannotation disambiguated wl-creative-work\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/forca\">for&ccedil;a<\/span> gravitacional terrestre, fornecida pelo elevador durante a subida ser&aacute; de&nbsp;<\/p><p class=\"wp-block-paragraph\"><strong>A) <\/strong>243 kW.&nbsp;<br><strong>B) <\/strong>816 kW.<br><strong>C) <\/strong>81 kW.&nbsp;<br><strong>D) <\/strong>162 kW.&nbsp;<br><strong>E) <\/strong>150 kW.<\/p><p class=\"wp-block-paragraph\"><strong>Resposta: <img decoding=\"async\" width=\"281\" height=\"130\" src=\"https:\/\/lh7-rt.googleusercontent.com\/docsz\/AD_4nXcD_Wax7wbnCXyKem3xTJiKi_FfXifiNLeKKMgUXzi740MH5uokD8o8qaRM1w5jmc4-yDmvcdImEUN282IDxLMbJGJL0g2ycI3Q9bBxaTCd-DnjkiyRNgMZeCmrOGQGTQOaSarpy7iTLFWIYbSUqUhJuqIg?key=8_bT6DDjm1s4WDDhgi2fnA\"><\/strong><\/p><p class=\"wp-block-paragraph\"><strong>Alternativa correta: <\/strong>D.<\/p><h2 class=\"wp-block-heading\" id=\"h-estude-mais-com-a-coruja\"><span class=\"ez-toc-section\" id=\"Estude-mais-com-a-Coruja\"><\/span>Estude mais com a Coruja!<span class=\"ez-toc-section-end\"><\/span><\/h2><p class=\"wp-block-paragraph\">O Estrat&eacute;gia Vestibulares &eacute; uma plataforma de estudo com milhares de quest&otilde;es de vestibulares respondidas de todo o Pa&iacute;s. O<a href=\"https:\/\/vestibulares.estrategiaeducacional.com.br\/\" target=\"_blank\"> Banco de Quest&otilde;es<\/a> abrange todas as disciplinas, com resolu&ccedil;&atilde;o de professores especialistas e muitos v&iacute;deos explicativos.<\/p><p class=\"wp-block-paragraph\">Nos cursos preparat&oacute;rios da Coruja, voc&ecirc; ter&aacute; acesso a aulas espec&iacute;ficas, de acordo com o conte&uacute;do program&aacute;tico de cada disciplina, com <span id=\"urn:enhancement-d7a44534-5256-47bb-bb25-2c0a42bed73f\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/material\">material<\/span> did&aacute;tico de qualidade, em diferentes plataformas multim&iacute;dias. Clique no banner abaixo e saiba mais!<\/p><p class=\"wp-block-paragraph\"><a id=\"cta\" class=\"cta-imagem\" href=\"https:\/\/vestibulares.estrategia.com\/curso\/banco-de-questes-anual\/\" target=\"blank\">\n                <img decoding=\"async\" width=\"100%\" src=\"https:\/\/vestibulares.estrategia.com\/portal\/wp-content\/uploads\/2021\/05\/BANNER_CRM_BQEV_V1.jpg\" alt=\"Banco de Quest\u00f5es EV\" title=\"BANNER_CRM_BQEV_V1\">\n        <\/a>\n\n\n<\/p><\/p>\n","protected":false},"excerpt":{"rendered":"O conceito de pot&ecirc;ncia foi importante para diversas &aacute;reas do conhecimento e desenvolvimento tecnol&oacute;gico, como a eletricidade, funcionamento&hellip;\n","protected":false},"author":23,"featured_media":122144,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[28],"tags":[],"class_list":["post-122138","post","type-post","status-publish","format-standard","has-post-thumbnail","category-fisica"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v25.9 (Yoast SEO v28.2) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Pot\u00eancia: conceito, trabalho e energia\u00a0<\/title>\n<meta name=\"description\" content=\"Aprenda mais sobre o conceito de pot\u00eancia, defini\u00e7\u00e3o, f\u00f3rmulas e aplica\u00e7\u00f5es. 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