{"id":1152,"date":"2018-11-08T05:31:08","date_gmt":"2018-11-08T05:31:08","guid":{"rendered":"http:\/\/lash.utrng.edu.mx\/?p=1152"},"modified":"2018-11-08T06:28:16","modified_gmt":"2018-11-08T06:28:16","slug":"momento-de-torsion","status":"publish","type":"post","link":"https:\/\/lash.utrng.edu.mx\/?p=1152","title":{"rendered":"Momento de Torsi\u00f3n"},"content":{"rendered":"\n<p><strong>LA PALANCA.<\/strong><\/p>\n\n\n\n<p>Es una barra r\u00edgida, sometida a dos esfuerzos y apoyada en un punto. Los esfuerzos que soporta son: La resistencia \u00abR\u00bb y la Fuerza \u00abF\u00bb. Seg\u00fan la posici\u00f3n de la resistencia, fuerza y punto de apoyo, las palancas pueden ser:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>Interapoyantes<\/li><li>Interresistentes<\/li><li>Interpotentes. <\/li><\/ul>\n\n\n\n<ul class=\"wp-block-gallery columns-3 wp-block-gallery-1 is-layout-flex wp-block-gallery-is-layout-flex\"><li class=\"blocks-gallery-item\"><figure><a href=\"http:\/\/lash.utrng.edu.mx\/wp-content\/uploads\/2018\/11\/a-1.png\"><img loading=\"lazy\" decoding=\"async\" width=\"441\" height=\"240\" src=\"http:\/\/lash.utrng.edu.mx\/wp-content\/uploads\/2018\/11\/a-1.png\" alt=\"\" data-id=\"1153\" data-link=\"http:\/\/lash.utrng.edu.mx\/?attachment_id=1153\" class=\"wp-image-1153\" srcset=\"https:\/\/lash.utrng.edu.mx\/wp-content\/uploads\/2018\/11\/a-1.png 441w, https:\/\/lash.utrng.edu.mx\/wp-content\/uploads\/2018\/11\/a-1-300x163.png 300w\" sizes=\"auto, (max-width: 441px) 100vw, 441px\" \/><\/a><\/figure><\/li><li class=\"blocks-gallery-item\"><figure><a href=\"http:\/\/lash.utrng.edu.mx\/wp-content\/uploads\/2018\/11\/b-1.png\"><img loading=\"lazy\" decoding=\"async\" width=\"449\" height=\"254\" src=\"http:\/\/lash.utrng.edu.mx\/wp-content\/uploads\/2018\/11\/b-1.png\" alt=\"\" data-id=\"1154\" data-link=\"http:\/\/lash.utrng.edu.mx\/?attachment_id=1154\" class=\"wp-image-1154\" srcset=\"https:\/\/lash.utrng.edu.mx\/wp-content\/uploads\/2018\/11\/b-1.png 449w, https:\/\/lash.utrng.edu.mx\/wp-content\/uploads\/2018\/11\/b-1-300x170.png 300w\" sizes=\"auto, (max-width: 449px) 100vw, 449px\" \/><\/a><\/figure><\/li><li class=\"blocks-gallery-item\"><figure><a href=\"http:\/\/lash.utrng.edu.mx\/wp-content\/uploads\/2018\/11\/c.png\"><img loading=\"lazy\" decoding=\"async\" width=\"383\" height=\"228\" src=\"http:\/\/lash.utrng.edu.mx\/wp-content\/uploads\/2018\/11\/c.png\" alt=\"\" data-id=\"1155\" data-link=\"http:\/\/lash.utrng.edu.mx\/?attachment_id=1155\" class=\"wp-image-1155\" srcset=\"https:\/\/lash.utrng.edu.mx\/wp-content\/uploads\/2018\/11\/c.png 383w, https:\/\/lash.utrng.edu.mx\/wp-content\/uploads\/2018\/11\/c-300x179.png 300w\" sizes=\"auto, (max-width: 383px) 100vw, 383px\" \/><\/a><\/figure><\/li><\/ul>\n\n\n\n<!--more-->\n\n\n\n<p><strong>ECUACI\u00d3N DE EQUILIBRIO DE LA PALANCA<\/strong><\/p>\n\n\n\n<p>Tanto la resistencia \u00abR\u00bb como la fuerza \u00abF\u00bb constituyen una cupla de momento con respecto al punto de apoyo \u00abO\u00bb. La condici\u00f3n para que haya equilibrio es que: (llamando negativo a la tendencia al giro en un sentido, positivo al contrario se tiene)<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><a href=\"http:\/\/lash.utrng.edu.mx\/wp-content\/uploads\/2018\/11\/1-3.png\"><img loading=\"lazy\" decoding=\"async\" width=\"373\" height=\"340\" src=\"http:\/\/lash.utrng.edu.mx\/wp-content\/uploads\/2018\/11\/1-3.png\" alt=\"\" class=\"wp-image-1156\" srcset=\"https:\/\/lash.utrng.edu.mx\/wp-content\/uploads\/2018\/11\/1-3.png 373w, https:\/\/lash.utrng.edu.mx\/wp-content\/uploads\/2018\/11\/1-3-300x273.png 300w\" sizes=\"auto, (max-width: 373px) 100vw, 373px\" \/><\/a><\/figure><\/div>\n\n\n\n<p class=\"has-text-color has-background has-medium-font-size has-very-light-gray-color has-vivid-cyan-blue-background-color\"><strong>Ejemplo 1<\/strong><\/p>\n\n\n\n<p>Calcular la fuerza necesaria para mover un bloque como el que se muestr a continuaci\u00f3n:<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><a href=\"http:\/\/lash.utrng.edu.mx\/wp-content\/uploads\/2018\/11\/2-1.png\"><img loading=\"lazy\" decoding=\"async\" width=\"463\" height=\"259\" src=\"http:\/\/lash.utrng.edu.mx\/wp-content\/uploads\/2018\/11\/2-1.png\" alt=\"\" class=\"wp-image-1157\" srcset=\"https:\/\/lash.utrng.edu.mx\/wp-content\/uploads\/2018\/11\/2-1.png 463w, https:\/\/lash.utrng.edu.mx\/wp-content\/uploads\/2018\/11\/2-1-300x168.png 300w\" sizes=\"auto, (max-width: 463px) 100vw, 463px\" \/><\/a><\/figure><\/div>\n\n\n\n<figure class=\"wp-block-image is-resized\"><a href=\"http:\/\/lash.utrng.edu.mx\/wp-content\/uploads\/2018\/11\/2a.png\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/lash.utrng.edu.mx\/wp-content\/uploads\/2018\/11\/2a.png\" alt=\"\" class=\"wp-image-1158\" width=\"336\" height=\"175\" srcset=\"https:\/\/lash.utrng.edu.mx\/wp-content\/uploads\/2018\/11\/2a.png 441w, https:\/\/lash.utrng.edu.mx\/wp-content\/uploads\/2018\/11\/2a-300x156.png 300w\" sizes=\"auto, (max-width: 336px) 100vw, 336px\" \/><\/a><\/figure>\n\n\n\n<p>Despejando R, quedar\u00eda:\u00a0<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img loading=\"lazy\" decoding=\"async\" width=\"143\" height=\"67\" src=\"http:\/\/lash.utrng.edu.mx\/wp-content\/uploads\/2018\/11\/2b.png\" alt=\"\" class=\"wp-image-1159\"\/><\/figure><\/div>\n\n\n\n<figure class=\"wp-block-image is-resized\"><a href=\"http:\/\/lash.utrng.edu.mx\/wp-content\/uploads\/2018\/11\/3-1.png\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/lash.utrng.edu.mx\/wp-content\/uploads\/2018\/11\/3-1.png\" alt=\"\" class=\"wp-image-1160\" width=\"545\" height=\"109\" srcset=\"https:\/\/lash.utrng.edu.mx\/wp-content\/uploads\/2018\/11\/3-1.png 531w, https:\/\/lash.utrng.edu.mx\/wp-content\/uploads\/2018\/11\/3-1-300x60.png 300w\" sizes=\"auto, (max-width: 545px) 100vw, 545px\" \/><\/a><\/figure>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<p class=\"has-medium-font-size\"><strong>El torno o Cabrestante.<\/strong><\/p>\n\n\n\n<p>Es una palanca Interapoyante, la constituye un cilindro de radio \u00abr\u00bb, al cual se le enrolla una cuerda. El cilindro esta conectado a una manija por su eje, la manija tiene un brazo \u00abm\u00bb. La condici\u00f3n de equilibrio es igual que la palanca<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter is-resized\"><a href=\"http:\/\/lash.utrng.edu.mx\/wp-content\/uploads\/2018\/11\/4-1.png\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/lash.utrng.edu.mx\/wp-content\/uploads\/2018\/11\/4-1.png\" alt=\"\" class=\"wp-image-1163\" width=\"321\" height=\"146\" srcset=\"https:\/\/lash.utrng.edu.mx\/wp-content\/uploads\/2018\/11\/4-1.png 371w, https:\/\/lash.utrng.edu.mx\/wp-content\/uploads\/2018\/11\/4-1-300x137.png 300w\" sizes=\"auto, (max-width: 321px) 100vw, 321px\" \/><\/a><\/figure><\/div>\n\n\n\n<ul class=\"wp-block-list\"><li>R : Resistencia.<\/li><li>F : Fuerza.<\/li><li>r : Radio del cilindro<\/li><li>m : Brazo de la Manija<\/li><\/ul>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><a href=\"http:\/\/lash.utrng.edu.mx\/wp-content\/uploads\/2018\/11\/5-1.png\"><img loading=\"lazy\" decoding=\"async\" width=\"522\" height=\"194\" src=\"http:\/\/lash.utrng.edu.mx\/wp-content\/uploads\/2018\/11\/5-1.png\" alt=\"\" class=\"wp-image-1164\" srcset=\"https:\/\/lash.utrng.edu.mx\/wp-content\/uploads\/2018\/11\/5-1.png 522w, https:\/\/lash.utrng.edu.mx\/wp-content\/uploads\/2018\/11\/5-1-300x111.png 300w\" sizes=\"auto, (max-width: 522px) 100vw, 522px\" \/><\/a><\/figure><\/div>\n\n\n\n<p class=\"has-text-color has-background has-medium-font-size has-very-light-gray-color has-vivid-cyan-blue-background-color\"><strong>Ejemplo 2<\/strong><\/p>\n\n\n\n<p>Se quiere sacar 20 litros de agua de un pozo artesiano con un torno de las siguientes caracter\u00edsticas: radio de cilindro 20 cm, brazo de la manija o manivela 30 cm. Calcular la fuerza necesaria. <\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/lash.utrng.edu.mx\/wp-content\/uploads\/2018\/11\/6-2.png\" alt=\"\" class=\"wp-image-1165\" width=\"355\" height=\"136\" srcset=\"https:\/\/lash.utrng.edu.mx\/wp-content\/uploads\/2018\/11\/6-2.png 434w, https:\/\/lash.utrng.edu.mx\/wp-content\/uploads\/2018\/11\/6-2-300x115.png 300w\" sizes=\"auto, (max-width: 355px) 100vw, 355px\" \/><\/figure><\/div>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<p class=\"has-medium-font-size\"><strong>LA POLEA FIJA<\/strong><\/p>\n\n\n\n<p>Es un rueda acanalada que gira alrededor de un eje fijo que pasa por su centro. La polea fija no ahorra esfuerzos, s\u00f3lo cambia la direcci\u00f3n de la Fuerza que se aplica.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter is-resized\"><a href=\"http:\/\/lash.utrng.edu.mx\/wp-content\/uploads\/2018\/11\/7-1.png\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/lash.utrng.edu.mx\/wp-content\/uploads\/2018\/11\/7-1.png\" alt=\"\" class=\"wp-image-1166\" width=\"303\" height=\"153\" srcset=\"https:\/\/lash.utrng.edu.mx\/wp-content\/uploads\/2018\/11\/7-1.png 347w, https:\/\/lash.utrng.edu.mx\/wp-content\/uploads\/2018\/11\/7-1-300x151.png 300w\" sizes=\"auto, (max-width: 303px) 100vw, 303px\" \/><\/a><\/figure><\/div>\n\n\n\n<p class=\"has-medium-font-size\"><strong>LA POLEA M\u00d3VIL<\/strong><\/p>\n\n\n\n<p>Es una rueda acanalada de cuyo eje de giro, que pasa por su centro, pende un peso. Puede ser:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li><strong>fuerzas paralelas<\/strong><\/li><li><strong>fuerzas no paralelas.<\/strong> <\/li><\/ul>\n\n\n\n<p><strong>Polea m\u00f3vil de fuerzas paralelas<\/strong>: Como se muestra a continuaci\u00f3n, las cuerdas que sostienen la polea est\u00e1n paralelas. Como es una palanca interapoyante la ecuaci\u00f3n de equilibrio es \u03a3F<sub>y<\/sub> = O, y c\u00f3mo son paralelas se tiene:<\/p>\n\n\n\n<p style=\"text-align:center\" class=\"has-medium-font-size\"><strong>F + F &#8211; R = 0<\/strong> <\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter is-resized\"><a href=\"http:\/\/lash.utrng.edu.mx\/wp-content\/uploads\/2018\/11\/8.png\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/lash.utrng.edu.mx\/wp-content\/uploads\/2018\/11\/8.png\" alt=\"\" class=\"wp-image-1167\" width=\"175\" height=\"327\" srcset=\"https:\/\/lash.utrng.edu.mx\/wp-content\/uploads\/2018\/11\/8.png 194w, https:\/\/lash.utrng.edu.mx\/wp-content\/uploads\/2018\/11\/8-161x300.png 161w\" sizes=\"auto, (max-width: 175px) 100vw, 175px\" \/><\/a><\/figure><\/div>\n\n\n\n<p>Lo que quiere decir que la tensi\u00f3n de la cuerda con la que hace fuerzas es la mitad de la resistencia o peso, que se quiere levantar.<\/p>\n\n\n\n<p><strong>Polea m\u00f3vil de fuerzas no paralelas<\/strong>: Como se observa a continuaci\u00f3n,  las prolongaciones de la cuerda que sostiene el peso se encuentran en un punto de la direcci\u00f3n de la resistencia. La condici\u00f3n de equilibrio es <br>\u03a3F<sub>y<\/sub>\u00a0= O, es decir: <\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter is-resized\"><a href=\"http:\/\/lash.utrng.edu.mx\/wp-content\/uploads\/2018\/11\/9.png\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/lash.utrng.edu.mx\/wp-content\/uploads\/2018\/11\/9.png\" alt=\"\" class=\"wp-image-1168\" width=\"273\" height=\"344\" srcset=\"https:\/\/lash.utrng.edu.mx\/wp-content\/uploads\/2018\/11\/9.png 295w, https:\/\/lash.utrng.edu.mx\/wp-content\/uploads\/2018\/11\/9-238x300.png 238w\" sizes=\"auto, (max-width: 273px) 100vw, 273px\" \/><\/a><\/figure><\/div>\n\n\n\n<figure class=\"wp-block-image is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/lash.utrng.edu.mx\/wp-content\/uploads\/2018\/11\/10.png\" alt=\"\" class=\"wp-image-1169\" width=\"354\" height=\"226\" srcset=\"https:\/\/lash.utrng.edu.mx\/wp-content\/uploads\/2018\/11\/10.png 309w, https:\/\/lash.utrng.edu.mx\/wp-content\/uploads\/2018\/11\/10-300x191.png 300w\" sizes=\"auto, (max-width: 354px) 100vw, 354px\" \/><\/figure>\n\n\n\n<p class=\"has-text-color has-background has-medium-font-size has-very-light-gray-color has-vivid-cyan-blue-background-color\"><strong>Ejemplo 3<\/strong><\/p>\n\n\n\n<p>Las prolongaciones de una cuerda que sostiene una polea m\u00f3vil forman un \u00e1ngulo de 60\u00b0, \u00bfCu\u00e1l ser\u00e1 la fuerza que debe hacerse para levantar un peso de 30 N ? <\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"344\" height=\"256\" src=\"http:\/\/lash.utrng.edu.mx\/wp-content\/uploads\/2018\/11\/11.png\" alt=\"\" class=\"wp-image-1170\" srcset=\"https:\/\/lash.utrng.edu.mx\/wp-content\/uploads\/2018\/11\/11.png 344w, https:\/\/lash.utrng.edu.mx\/wp-content\/uploads\/2018\/11\/11-300x223.png 300w\" sizes=\"auto, (max-width: 344px) 100vw, 344px\" \/><\/figure>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<p class=\"has-medium-font-size\"><strong>EL POLIPASTO<\/strong><\/p>\n\n\n\n<p>En un sistema de poleas hay tres clases: <\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>aparejo potencial o trocla<\/li><li>aparejo factorial o mot\u00f3n<\/li><li>aparejo diferencial o tecle. <\/li><\/ul>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><a href=\"http:\/\/lash.utrng.edu.mx\/wp-content\/uploads\/2018\/11\/12.png\"><img loading=\"lazy\" decoding=\"async\" width=\"330\" height=\"305\" src=\"http:\/\/lash.utrng.edu.mx\/wp-content\/uploads\/2018\/11\/12.png\" alt=\"\" class=\"wp-image-1171\" srcset=\"https:\/\/lash.utrng.edu.mx\/wp-content\/uploads\/2018\/11\/12.png 330w, https:\/\/lash.utrng.edu.mx\/wp-content\/uploads\/2018\/11\/12-300x277.png 300w\" sizes=\"auto, (max-width: 330px) 100vw, 330px\" \/><\/a><\/figure><\/div>\n\n\n\n<p><strong>Aparejo Potencial o Trocla<\/strong>: Es el conjunto de una polea fija y varias poleas m\u00f3viles. <strong>La primera<\/strong> polea m\u00f3vil de abajo, reduce a la mitad la fuerza necesaria para levantar la resistencia; <strong>la segunda<\/strong> de abajo reduce a la cuarta parte, <strong>la tercera<\/strong> a la octava, etc, es decir: en general, seg\u00fan el n\u00famero de poleas m\u00f3viles, la fuerza necesaria para levantar un peso se reduce a la resistencia dividida entre 2 elevado a una potencia igual al n\u00famero de poleas m\u00f3viles: <\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><a href=\"http:\/\/lash.utrng.edu.mx\/wp-content\/uploads\/2018\/11\/13.png\"><img loading=\"lazy\" decoding=\"async\" width=\"123\" height=\"71\" src=\"http:\/\/lash.utrng.edu.mx\/wp-content\/uploads\/2018\/11\/13.png\" alt=\"\" class=\"wp-image-1173\"\/><\/a><\/figure><\/div>\n\n\n\n<ul class=\"wp-block-list\"><li>F : Fuerza aplicada.<\/li><li>R : Resistencia a vencer o peso que levantar.<\/li><li>n : N\u00famero de poleas m\u00f3viles.<\/li><\/ul>\n\n\n\n<p class=\"has-text-color has-background has-medium-font-size has-very-light-gray-color has-vivid-cyan-blue-background-color\"><strong>Ejemplo 4<\/strong><\/p>\n\n\n\n<p>\u00bfCu\u00e1l ser\u00e1 el numero de poleas m\u00f3viles que se necesita para levantar un peso de 112N con una fuerza de 7N?<\/p>\n\n\n\n<figure class=\"wp-block-image is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/lash.utrng.edu.mx\/wp-content\/uploads\/2018\/11\/14.png\" alt=\"\" class=\"wp-image-1174\" width=\"470\" height=\"208\" srcset=\"https:\/\/lash.utrng.edu.mx\/wp-content\/uploads\/2018\/11\/14.png 504w, https:\/\/lash.utrng.edu.mx\/wp-content\/uploads\/2018\/11\/14-300x133.png 300w\" sizes=\"auto, (max-width: 470px) 100vw, 470px\" \/><\/figure>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<p><strong>Aparejo Factorial o Mot\u00f3n<\/strong>: Es un conjunto de poleas m\u00f3viles y un conjunto de poleas fijas. Puede ser n<sub>1<\/sub>, el\u00a0n\u00famero de poleas m\u00f3viles y n<sub>2<\/sub> el n\u00famero de poleas fijas lo que quiere decir que el n\u00famero total de poleas ser\u00e1 n:<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img loading=\"lazy\" decoding=\"async\" width=\"143\" height=\"41\" src=\"http:\/\/lash.utrng.edu.mx\/wp-content\/uploads\/2018\/11\/15.png\" alt=\"\" class=\"wp-image-1175\"\/><\/figure><\/div>\n\n\n\n<p>Pero resulta que el n\u00famero de poleas m\u00f3viles y fijas tiene que ser el mismo, es decir:<\/p>\n\n\n\n<p style=\"text-align:center\" class=\"has-medium-font-size\"><strong>n<\/strong><sub><strong>1\u00a0<\/strong><\/sub><strong>=\u00a0n<\/strong><sub><strong>2<\/strong><\/sub><\/p>\n\n\n\n<p> <br>Si la fuerza \u00abF\u00bb se desplaza una distancia d<sub><strong>1<\/strong><\/sub>, la resistencia \u00abR\u00bb sube una distancia d<sub><strong>2<\/strong><\/sub>. El trabajo realizado por \u00abF\u00bb ha sido transmitido a la resistencia \u00abR\u00bb, luego igualando trabajos:<\/p>\n\n\n\n<p style=\"text-align:center\" class=\"has-medium-font-size\"><strong>F .\u00a0d<\/strong><sub><strong>1<\/strong><\/sub><strong>\u00a0= R .\u00a0d<\/strong><sub><strong>2<\/strong><\/sub><\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><a href=\"http:\/\/lash.utrng.edu.mx\/wp-content\/uploads\/2018\/11\/16.png\"><img loading=\"lazy\" decoding=\"async\" width=\"255\" height=\"418\" src=\"http:\/\/lash.utrng.edu.mx\/wp-content\/uploads\/2018\/11\/16.png\" alt=\"\" class=\"wp-image-1176\" srcset=\"https:\/\/lash.utrng.edu.mx\/wp-content\/uploads\/2018\/11\/16.png 255w, https:\/\/lash.utrng.edu.mx\/wp-content\/uploads\/2018\/11\/16-183x300.png 183w\" sizes=\"auto, (max-width: 255px) 100vw, 255px\" \/><\/a><\/figure><\/div>\n\n\n\n<figure class=\"wp-block-image is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/lash.utrng.edu.mx\/wp-content\/uploads\/2018\/11\/17.png\" alt=\"\" class=\"wp-image-1177\" width=\"388\" height=\"327\" srcset=\"https:\/\/lash.utrng.edu.mx\/wp-content\/uploads\/2018\/11\/17.png 506w, https:\/\/lash.utrng.edu.mx\/wp-content\/uploads\/2018\/11\/17-300x253.png 300w\" sizes=\"auto, (max-width: 388px) 100vw, 388px\" \/><\/figure>\n\n\n\n<p class=\"has-text-color has-background has-medium-font-size has-very-light-gray-color has-vivid-cyan-blue-background-color\"><strong>Ejemplo 5<\/strong><\/p>\n\n\n\n<p>\u00bfCu\u00e1ntas poleas son necesarias, en un aparejo factorial o mont\u00f3n entre fijas y m\u00f3viles para ahorrar 1\/6 de esfuerzo con respecto al peso de 120N que se quiere levantar?<\/p>\n\n\n\n<figure class=\"wp-block-image is-resized\"><a href=\"http:\/\/lash.utrng.edu.mx\/wp-content\/uploads\/2018\/11\/18.png\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/lash.utrng.edu.mx\/wp-content\/uploads\/2018\/11\/18.png\" alt=\"\" class=\"wp-image-1178\" width=\"359\" height=\"224\" srcset=\"https:\/\/lash.utrng.edu.mx\/wp-content\/uploads\/2018\/11\/18.png 435w, https:\/\/lash.utrng.edu.mx\/wp-content\/uploads\/2018\/11\/18-300x188.png 300w\" sizes=\"auto, (max-width: 359px) 100vw, 359px\" \/><\/a><\/figure>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<p><strong>Aparejo Diferencial o Tede<\/strong>: Consta de un polea fija con dos radios distintos (R y r) y con per\u00edmetros engranados; en realidad se trata de dos poleas soldadas en sus caras laterales; adem\u00e1s, consta de una polea m\u00f3vil, tambi\u00e9n con per\u00edmetro engranado, \u00e9sta polea es la que soporta la carga \u00abP\u00bb.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter is-resized\"><a href=\"http:\/\/lash.utrng.edu.mx\/wp-content\/uploads\/2018\/11\/19.png\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/lash.utrng.edu.mx\/wp-content\/uploads\/2018\/11\/19.png\" alt=\"\" class=\"wp-image-1179\" width=\"237\" height=\"359\" srcset=\"https:\/\/lash.utrng.edu.mx\/wp-content\/uploads\/2018\/11\/19.png 333w, https:\/\/lash.utrng.edu.mx\/wp-content\/uploads\/2018\/11\/19-198x300.png 198w\" sizes=\"auto, (max-width: 237px) 100vw, 237px\" \/><\/a><\/figure><\/div>\n","protected":false},"excerpt":{"rendered":"<p>LA PALANCA. Es una barra r\u00edgida, sometida a dos esfuerzos y apoyada en un punto. Los esfuerzos que soporta son: La resistencia \u00abR\u00bb y la Fuerza \u00abF\u00bb. Seg\u00fan la posici\u00f3n de la resistencia, fuerza y punto de apoyo, las palancas pueden ser: Interapoyantes Interresistentes Interpotentes.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"ngg_post_thumbnail":0,"footnotes":""},"categories":[32],"tags":[],"class_list":["post-1152","post","type-post","status-publish","format-standard","hentry","category-segundoparcialfisica"],"_links":{"self":[{"href":"https:\/\/lash.utrng.edu.mx\/index.php?rest_route=\/wp\/v2\/posts\/1152","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lash.utrng.edu.mx\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lash.utrng.edu.mx\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lash.utrng.edu.mx\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/lash.utrng.edu.mx\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1152"}],"version-history":[{"count":4,"href":"https:\/\/lash.utrng.edu.mx\/index.php?rest_route=\/wp\/v2\/posts\/1152\/revisions"}],"predecessor-version":[{"id":1180,"href":"https:\/\/lash.utrng.edu.mx\/index.php?rest_route=\/wp\/v2\/posts\/1152\/revisions\/1180"}],"wp:attachment":[{"href":"https:\/\/lash.utrng.edu.mx\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1152"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lash.utrng.edu.mx\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1152"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lash.utrng.edu.mx\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1152"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}