{"id":345,"date":"2023-06-21T03:56:41","date_gmt":"2023-06-21T03:56:41","guid":{"rendered":"https:\/\/physigeek.com\/pt\/vantagem-mecanica\/"},"modified":"2023-06-21T03:56:41","modified_gmt":"2023-06-21T03:56:41","slug":"vantagem-mecanica","status":"publish","type":"post","link":"https:\/\/physigeek.com\/pt\/vantagem-mecanica\/","title":{"rendered":"Vantagem mec\u00e2nica"},"content":{"rendered":"<p>Este artigo explica o que \u00e9 vantagem mec\u00e2nica. Assim, voc\u00ea aprender\u00e1 o significado de vantagem mec\u00e2nica, como calcular a vantagem mec\u00e2nica e qual a diferen\u00e7a entre a vantagem mec\u00e2nica ideal e a vantagem mec\u00e2nica real.<\/p>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%C2%BFQue-es-la-ventaja-mecanica\"><\/span> O que \u00e9 vantagem mec\u00e2nica?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p> <strong>A vantagem mec\u00e2nica<\/strong> \u00e9 uma medida que indica o fator pelo qual a for\u00e7a aplicada a um mecanismo \u00e9 multiplicada. Em outras palavras, a vantagem mec\u00e2nica \u00e9 um par\u00e2metro caracter\u00edstico de um mecanismo que expressa o grau de amplifica\u00e7\u00e3o de uma for\u00e7a utilizando o referido mecanismo.<\/p>\n<p> Por exemplo, se a vantagem mec\u00e2nica de uma <a href=\"https:\/\/physigeek.com\/pt\/maquina-simples\/\">m\u00e1quina simples<\/a> for igual a 2, isso significa que o mecanismo duplica a for\u00e7a aplicada.<\/p>\n<p> Geralmente, m\u00e1quinas simples s\u00e3o utilizadas para aumentar o valor de uma for\u00e7a, por exemplo, uma <a href=\"https:\/\/physigeek.com\/pt\/guindaste\/\">talha<\/a> permite mover um objeto pesado com pouco esfor\u00e7o. Assim, vantagem mec\u00e2nica \u00e9 um valor que indica o fator pelo qual a for\u00e7a aplicada a um dispositivo mec\u00e2nico \u00e9 aumentada. <\/p>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Formula-de-la-ventaja-mecanica\"><\/span> F\u00f3rmula de vantagem mec\u00e2nica<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p> A vantagem mec\u00e2nica \u00e9 a rela\u00e7\u00e3o entre a for\u00e7a de sa\u00edda e a for\u00e7a de entrada do mecanismo. Portanto, a vantagem mec\u00e2nica \u00e9 igual \u00e0 raz\u00e3o entre a for\u00e7a de sa\u00edda e a for\u00e7a de entrada.<\/p>\n<p> Assim, a <strong>f\u00f3rmula para calcular a vantagem mec\u00e2nica<\/strong> de um mecanismo \u00e9 a seguinte:<\/p>\n<p class=\"has-text-align-center\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/ql-cache\/quicklatex.com-e69615adb7195faa10ab23bb2d0c127a_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"VM=\\cfrac{F_s}{F_e}\" title=\"Rendered by QuickLaTeX.com\" height=\"41\" width=\"78\" style=\"vertical-align: -15px;\"><\/p>\n<\/p>\n<p> A vantagem mec\u00e2nica de uma m\u00e1quina simples tamb\u00e9m pode ser calculada dividindo a velocidade da for\u00e7a aplicada pela velocidade com que a carga se move. Da mesma forma, esta express\u00e3o tamb\u00e9m equivale ao deslocamento do ponto da for\u00e7a aplicada dividido pelo deslocamento da carga:<\/p>\n<p class=\"has-text-align-center\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/ql-cache\/quicklatex.com-49a79c6eb08e6c7dfa1dc38c72dfa12d_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"VM=\\cfrac{F_s}{F_e}=\\cfrac{v_e}{v_s}=\\cfrac{d_e}{d_s}\" title=\"Rendered by QuickLaTeX.com\" height=\"41\" width=\"162\" style=\"vertical-align: -15px;\"><\/p>\n<\/p>\n<p style=\"margin-bottom:5px\"> Ouro: <\/p>\n<ul style=\"color:#4fd12f; font-weight: bold;\">\n<li style=\"margin-bottom:5px\"><span style=\"color:#101010;font-weight: normal;\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/ql-cache\/quicklatex.com-500d3f864dff26e3d484896a16aa89bb_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"VM\" title=\"Rendered by QuickLaTeX.com\" height=\"12\" width=\"33\" style=\"vertical-align: 0px;\"><\/p>\n<p> \u00e9 a vantagem mec\u00e2nica. <\/span><\/li>\n<li style=\"margin-bottom:5px\"><span style=\"color:#101010;font-weight: normal;\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/ql-cache\/quicklatex.com-7fd810be78178579eb8b816e030d2e47_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"F_s\" title=\"Rendered by QuickLaTeX.com\" height=\"15\" width=\"17\" style=\"vertical-align: -3px;\"><\/p>\n<p> \u00e9 a for\u00e7a de sa\u00edda. <\/span><\/li>\n<li style=\"margin-bottom:5px\"><span style=\"color:#101010;font-weight: normal;\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/ql-cache\/quicklatex.com-a7461483124af31f0d50f7ea272abe88_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"F_e\" title=\"Rendered by QuickLaTeX.com\" height=\"15\" width=\"17\" style=\"vertical-align: -3px;\"><\/p>\n<p> \u00e9 a for\u00e7a de entrada. <\/span><\/li>\n<li style=\"margin-bottom:5px\"><span style=\"color:#101010;font-weight: normal;\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/ql-cache\/quicklatex.com-f0fb407b2238594ffcad367247047a66_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"v_e\" title=\"Rendered by QuickLaTeX.com\" height=\"11\" width=\"15\" style=\"vertical-align: -3px;\"><\/p>\n<p> \u00e9 a velocidade de entrada. <\/span><\/li>\n<li style=\"margin-bottom:5px\"><span style=\"color:#101010;font-weight: normal;\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/ql-cache\/quicklatex.com-f8074c6444affce8b175811c73865d6f_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"v_s\" title=\"Rendered by QuickLaTeX.com\" height=\"11\" width=\"15\" style=\"vertical-align: -3px;\"><\/p>\n<p> \u00e9 a velocidade de sa\u00edda. <\/span><\/li>\n<li style=\"margin-bottom:5px\"><span style=\"color:#101010;font-weight: normal;\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/ql-cache\/quicklatex.com-b24a5a6c9ba906559f3e7e1d1526215e_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"d_e\" title=\"Rendered by QuickLaTeX.com\" height=\"15\" width=\"15\" style=\"vertical-align: -3px;\"><\/p>\n<p> \u00e9 a dist\u00e2ncia percorrida pela entrada. <\/span><\/li>\n<li style=\"margin-bottom:5px\"><span style=\"color:#101010;font-weight: normal;\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/ql-cache\/quicklatex.com-9cced61ff93d503087688559c27938d8_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"d_s\" title=\"Rendered by QuickLaTeX.com\" height=\"15\" width=\"15\" style=\"vertical-align: -3px;\"><\/p>\n<p> \u00e9 a dist\u00e2ncia percorrida pela sa\u00edda.<\/span><\/li>\n<\/ul>\n<p> Por outro lado, se quisermos transmitir um momento em vez de uma for\u00e7a, a vantagem mec\u00e2nica \u00e9 calculada dividindo o momento de sa\u00edda pelo momento de entrada. Por exemplo, a vantagem mec\u00e2nica das engrenagens das rodas \u00e9 medida pela rela\u00e7\u00e3o entre o momento transmitido.<\/p>\n<p class=\"has-text-align-center\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/ql-cache\/quicklatex.com-ce804815f519a2d3de8ecd89712cec39_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"VM=\\cfrac{M_s}{M_e}=\\cfrac{\\omega_e}{\\omega_s}\" title=\"Rendered by QuickLaTeX.com\" height=\"41\" width=\"128\" style=\"vertical-align: -15px;\"><\/p>\n<\/p>\n<p style=\"margin-bottom:5px\"> Ouro: <\/p>\n<ul style=\"color:#4fd12f; font-weight: bold;\">\n<li style=\"margin-bottom:5px\"><span style=\"color:#101010;font-weight: normal;\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/ql-cache\/quicklatex.com-500d3f864dff26e3d484896a16aa89bb_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"VM\" title=\"Rendered by QuickLaTeX.com\" height=\"12\" width=\"33\" style=\"vertical-align: 0px;\"><\/p>\n<p> \u00e9 a vantagem mec\u00e2nica. <\/span><\/li>\n<li style=\"margin-bottom:5px\"><span style=\"color:#101010;font-weight: normal;\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/ql-cache\/quicklatex.com-42cd8a130aafc0647b524300a8f11904_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"M_s\" title=\"Rendered by QuickLaTeX.com\" height=\"15\" width=\"23\" style=\"vertical-align: -3px;\"><\/p>\n<p> \u00e9 a hora do lan\u00e7amento. <\/span><\/li>\n<li style=\"margin-bottom:5px\"><span style=\"color:#101010;font-weight: normal;\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/ql-cache\/quicklatex.com-b181a2eb5b07a415c45d53de9ee4763a_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"M_e\" title=\"Rendered by QuickLaTeX.com\" height=\"15\" width=\"23\" style=\"vertical-align: -3px;\"><\/p>\n<p> \u00e9 o hor\u00e1rio de entrada. <\/span><\/li>\n<li style=\"margin-bottom:5px\"><span style=\"color:#101010;font-weight: normal;\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/ql-cache\/quicklatex.com-cae20b713a1dc40d4936cd350395dec8_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\omega_e\" title=\"Rendered by QuickLaTeX.com\" height=\"11\" width=\"17\" style=\"vertical-align: -3px;\"><\/p>\n<p> \u00e9 a velocidade angular de entrada. <\/span><\/li>\n<li style=\"margin-bottom:5px\"><span style=\"color:#101010;font-weight: normal;\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/ql-cache\/quicklatex.com-92a244bfae254aef445ef84c075111a3_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\omega_s\" title=\"Rendered by QuickLaTeX.com\" height=\"11\" width=\"17\" style=\"vertical-align: -3px;\"><\/p>\n<p> \u00e9 a velocidade angular de sa\u00edda.<\/span><\/li>\n<\/ul>\n<p> Ent\u00e3o, da f\u00f3rmula da vantagem mec\u00e2nica, podem ser deduzidas as seguintes rela\u00e7\u00f5es:<\/p>\n<ul style=\"color:#4fd12f; font-weight: bold;\">\n<li style=\"margin-bottom:20px\"> <span style=\"color:#101010;font-weight: normal;\"><strong>VM&gt;1<\/strong> : A for\u00e7a de sa\u00edda \u00e9 maior que a for\u00e7a aplicada, ent\u00e3o o mecanismo aumenta a magnitude da for\u00e7a. Por outro lado, a dist\u00e2ncia percorrida pela carga \u00e9 menor que a dist\u00e2ncia percorrida pelo ponto onde a for\u00e7a \u00e9 aplicada.<\/span><\/li>\n<li style=\"margin-bottom:20px\"> <span style=\"color:#101010;font-weight: normal;\"><strong>VM&lt;1<\/strong> : A for\u00e7a de sa\u00edda \u00e9 menor que a for\u00e7a aplicada, ent\u00e3o o mecanismo reduz o valor da for\u00e7a. Por\u00e9m, obtemos um deslocamento de carga maior que o deslocamento realizado no ponto de aplica\u00e7\u00e3o da for\u00e7a.<\/span><\/li>\n<li style=\"margin-bottom:20px\"> <span style=\"color:#101010;font-weight: normal;\"><strong>VM=1<\/strong> : a for\u00e7a de sa\u00edda do mecanismo \u00e9 igual \u00e0 for\u00e7a exercida sobre ele. Os deslocamentos da carga e o ponto de aplica\u00e7\u00e3o da for\u00e7a tamb\u00e9m s\u00e3o id\u00eanticos. Embora esses tipos de mecanismos n\u00e3o ofere\u00e7am vantagens mec\u00e2nicas, geralmente s\u00e3o usados para exercer for\u00e7a de maneira mais confort\u00e1vel. Por exemplo, uma <a href=\"https:\/\/physigeek.com\/pt\/polia\/\">polia simples<\/a> permite que a for\u00e7a descendente levante um peso, facilitando o levantamento da carga.<\/span> <\/li>\n<\/ul>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Ejemplos-de-ventaja-mecanica\"><\/span> Exemplos de vantagem mec\u00e2nica<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p> Tendo visto a defini\u00e7\u00e3o de vantagem mec\u00e2nica e qual \u00e9 a sua f\u00f3rmula, veremos agora dois exemplos em que se calcula a vantagem mec\u00e2nica de um mecanismo.<\/p>\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Palanca\"><\/span> Elevador<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li> Uma alavanca tem seu fulcro a 70 cm do ponto onde a for\u00e7a \u00e9 aplicada e a 30 cm da carga. Qual \u00e9 a vantagem mec\u00e2nica da alavanca?<\/li>\n<\/ul>\n<p> Nas alavancas, a for\u00e7a de entrada atrav\u00e9s do bra\u00e7o de pot\u00eancia \u00e9 equivalente \u00e0 for\u00e7a de sa\u00edda atrav\u00e9s do bra\u00e7o de resist\u00eancia (lei da alavanca). Ou seja, neste tipo de m\u00e1quinas simples, cumpre-se a seguinte equa\u00e7\u00e3o:<\/p>\n<p class=\"has-text-align-center\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/ql-cache\/quicklatex.com-1cca3975321b9b4c1826d726153b8812_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"F_e\\cdot B_p=F_s\\cdot B_r\" title=\"Rendered by QuickLaTeX.com\" height=\"18\" width=\"127\" style=\"vertical-align: -6px;\"><\/p>\n<\/p>\n<p> Assim, da igualdade anterior, podemos deduzir que a vantagem mec\u00e2nica de uma alavanca pode ser determinada pela seguinte express\u00e3o:<\/p>\n<p class=\"has-text-align-center\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/ql-cache\/quicklatex.com-21acc35962741d8fbe01fb4adbf0e085_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"VM=\\cfrac{F_s}{F_e}=\\cfrac{B_p}{B_r}\" title=\"Rendered by QuickLaTeX.com\" height=\"41\" width=\"125\" style=\"vertical-align: -15px;\"><\/p>\n<\/p>\n<p> A defini\u00e7\u00e3o do problema nos diz que o bra\u00e7o de for\u00e7a da alavanca tem 70 cm e o bra\u00e7o de resist\u00eancia tem 30 cm. Portanto, substituindo os dados na f\u00f3rmula, podemos encontrar a vantagem mec\u00e2nica da alavanca: <\/p>\n<p class=\"has-text-align-center\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/ql-cache\/quicklatex.com-24cc43684b2fdca85799535e18d99846_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"VM=\\cfrac{F_s}{F_e}=\\cfrac{B_p}{B_r}=\\cfrac{70}{30}=2.33\" title=\"Rendered by QuickLaTeX.com\" height=\"42\" width=\"223\" style=\"vertical-align: -15px;\"><\/p>\n<\/p>\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Ruedas-de-friccion\"><\/span> rodas de fric\u00e7\u00e3o<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li> Qual \u00e9 a vantagem mec\u00e2nica de um mecanismo de roda de fric\u00e7\u00e3o se o di\u00e2metro da roda de entrada for 0,35 m e o di\u00e2metro da roda de sa\u00edda for 0,60 m?<\/li>\n<\/ul>\n<p> A <a href=\"https:\/\/physigeek.com\/pt\">f\u00f3rmula das rodas de fric\u00e7\u00e3o<\/a> permite-nos relacionar o di\u00e2metro das rodas com as suas velocidades angulares:<\/p>\n<p class=\"has-text-align-center\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/ql-cache\/quicklatex.com-75192997f1ea1d96e7b6e06010460785_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"D_e\\cdot \\omega_e =D_s\\cdot \\omega_s\" title=\"Rendered by QuickLaTeX.com\" height=\"15\" width=\"128\" style=\"vertical-align: -3px;\"><\/p>\n<\/p>\n<p> Consequentemente, por se tratar de um mecanismo no qual temos interesse em transmitir um momento, a vantagem mec\u00e2nica \u00e9 calculada atrav\u00e9s da seguinte express\u00e3o:<\/p>\n<p class=\"has-text-align-center\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/ql-cache\/quicklatex.com-524a732c1e98cc788e2147ad52305e64_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"VM=\\cfrac{M_s}{M_e}=\\cfrac{\\omega_e}{\\omega_s}=\\cfrac{D_s}{D_e}\" title=\"Rendered by QuickLaTeX.com\" height=\"41\" width=\"175\" style=\"vertical-align: -15px;\"><\/p>\n<\/p>\n<p> O valor da vantagem mec\u00e2nica deste mecanismo \u00e9 portanto:<\/p>\n<p class=\"has-text-align-center\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/ql-cache\/quicklatex.com-7cb9af78a6c9d59a43e6d004caaa8db8_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"VM=\\cfrac{M_s}{M_e}=\\cfrac{w_e}{w_s}=\\cfrac{D_s}{D_e}=\\cfrac{0.60}{0.35}=1.71[\/ latex] \n\n<h2 class=&quot;wp-block-heading&quot;><span class=&quot;ez-toc-section&quot; id=&quot;Ventaja-mecanica-real-y-ventaja-mecanica-ideal&quot;><\/span> Avantage m\u00e9canique r\u00e9el et avantage m\u00e9canique id\u00e9al<span class=&quot;ez-toc-section-end&quot;><\/span><\/h2>\n<p> L&#8217;avantage m\u00e9canique d&#8217;un m\u00e9canisme peut \u00eatre class\u00e9 en deux types :<\/p>\n<ul style=&quot;color:#4fd12f; font-weight: bold;&quot;>\n<li style=&quot;margin-bottom:20px&quot;> <span style=&quot;color:#101010;font-weight: normal;&quot;><strong>Avantage m\u00e9canique id\u00e9al<\/strong> : \u00e9galement appel\u00e9 avantage m\u00e9canique th\u00e9orique, lors du calcul de ce type d&#8217;avantage m\u00e9canique, on suppose des conditions id\u00e9ales (absence de frottement, de vibration, etc.). Par cons\u00e9quent, l&#8217;avantage m\u00e9canique id\u00e9al est \u00e9quivalent au rapport entre la force de sortie et la force d&#8217;entr\u00e9e.<\/span><\/li>\n<li style=&quot;margin-bottom:20px&quot;> <span style=&quot;color:#101010;font-weight: normal;&quot;><strong>Avantage m\u00e9canique r\u00e9el<\/strong> &#8211; \u00c9galement appel\u00e9es avantage m\u00e9canique pratique, les pertes du syst\u00e8me sont prises en compte dans le calcul de l&#8217;avantage m\u00e9canique. Par cons\u00e9quent, l&#8217;avantage m\u00e9canique r\u00e9el est toujours inf\u00e9rieur \u00e0 l&#8217;avantage m\u00e9canique id\u00e9al.<\/span><\/li>\n<\/ul>\n<p> Dans une situation r\u00e9elle, tout m\u00e9canisme subit des pertes d&#8217;\u00e9nergie dues au frottement, \u00e0 l&#8217;usure et \u00e0 d&#8217;autres facteurs. Ainsi, pour calculer l&#8217;avantage m\u00e9canique r\u00e9el d&#8217;un m\u00e9canisme, la force d&#8217;entr\u00e9e appliqu\u00e9e au syst\u00e8me et la force de sortie du syst\u00e8me doivent \u00eatre mesur\u00e9es exp\u00e9rimentalement, et la relation entre les deux sera la valeur de l&#8217;avantage m\u00e9canique r\u00e9el. [latex]VM_{real}=\\cfrac{F_{s_{real}}}{F_{e_{real}}}&#8221; title=&#8221;Rendered by QuickLaTeX.com&#8221; height=&#8221;392&#8243; width=&#8221;3025&#8243; style=&#8221;vertical-align: -17px;&#8221;><\/p>\n<\/p>\n<p> Assim, a efici\u00eancia mec\u00e2nica de um mecanismo \u00e9 definida como a raz\u00e3o entre a vantagem mec\u00e2nica real e a vantagem mec\u00e2nica ideal:<\/p>\n<p class=\"has-text-align-center\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/ql-cache\/quicklatex.com-f25fa279101b4fd8c48956f8c18ecb7d_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\eta=\\cfrac{VM_{real}}{VM_{id\u00e9al}}\" title=\"Rendered by QuickLaTeX.com\" height=\"41\" width=\"98\" style=\"vertical-align: -15px;\"><\/p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Este artigo explica o que \u00e9 vantagem mec\u00e2nica. Assim, voc\u00ea aprender\u00e1 o significado de vantagem mec\u00e2nica, como calcular a vantagem mec\u00e2nica e qual a diferen\u00e7a entre a vantagem mec\u00e2nica ideal e a vantagem mec\u00e2nica real. O que \u00e9 vantagem mec\u00e2nica? A vantagem mec\u00e2nica \u00e9 uma medida que indica o fator pelo qual a for\u00e7a aplicada &hellip;<\/p>\n<p class=\"read-more\"> <a class=\"\" href=\"https:\/\/physigeek.com\/pt\/vantagem-mecanica\/\"> <span class=\"screen-reader-text\">Vantagem mec\u00e2nica<\/span> Leia mais &raquo;<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"","footnotes":""},"categories":[10],"tags":[],"class_list":["post-345","post","type-post","status-publish","format-standard","hentry","category-maquinas-e-mecanismos"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\u25b7 O que \u00e9 vantagem mec\u00e2nica? (f\u00f3rmula e exemplos)<\/title>\n<meta name=\"description\" content=\"Aqui voc\u00ea encontrar\u00e1 o que \u00e9 vantagem mec\u00e2nica, como a vantagem mec\u00e2nica \u00e9 calculada (f\u00f3rmula) e exemplos de c\u00e1lculo de vantagem mec\u00e2nica.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/physigeek.com\/pt\/vantagem-mecanica\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u25b7 O que \u00e9 vantagem mec\u00e2nica? 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