{"id":21,"date":"2023-06-27T12:59:55","date_gmt":"2023-06-27T12:59:55","guid":{"rendered":"https:\/\/physigeek.com\/cn\/%e7%ac%ac%e4%b8%80%e5%b9%b3%e8%a1%a1%e6%9d%a1%e4%bb%b6\/"},"modified":"2023-06-27T12:59:55","modified_gmt":"2023-06-27T12:59:55","slug":"%e7%ac%ac%e4%b8%80%e5%b9%b3%e8%a1%a1%e6%9d%a1%e4%bb%b6","status":"publish","type":"post","link":"https:\/\/physigeek.com\/cn\/%e7%ac%ac%e4%b8%80%e5%b9%b3%e8%a1%a1%e6%9d%a1%e4%bb%b6\/","title":{"rendered":"\u5e73\u8861\u7684\u9996\u8981\u6761\u4ef6"},"content":{"rendered":"<p>\u672c\u6587\u89e3\u91ca\u4e86\u7b2c\u4e00\u4e2a\u5e73\u8861\u6761\u4ef6\u7684\u7ec4\u6210\u3002\u60a8\u8fd8\u5c06\u627e\u5230\u7b2c\u4e00\u4e2a\u5e73\u8861\u6761\u4ef6\u7684\u771f\u5b9e\u793a\u4f8b\uff0c\u6700\u540e\uff0c\u60a8\u5c06\u80fd\u591f\u901a\u8fc7\u89e3\u51b3\u8be5\u4e3b\u9898\u7684\u7ec3\u4e60\u8fdb\u884c\u7ec3\u4e60\u3002 <\/p>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%C2%BFCual-es-la-primera-condicion-de-equilibrio\"><\/span>\u7b2c\u4e00\u5e73\u8861\u6761\u4ef6\u662f\u4ec0\u4e48\uff1f<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u5728\u7269\u7406\u5b66\u4e2d\uff0c<strong>\u5e73\u8861\u7684\u7b2c\u4e00\u4e2a\u6761\u4ef6<\/strong>\u89c4\u5b9a\uff0c\u5982\u679c\u65bd\u52a0\u5230\u7269\u4f53\u4e0a\u7684\u529b\u7684\u603b\u548c\u7b49\u4e8e\u96f6\uff0c\u5219\u8be5\u7269\u4f53\u5904\u4e8e\u5e73\u79fb\u5e73\u8861\u3002<\/p>\n<p>\u56e0\u6b64\uff0c\u5f53\u7cfb\u7edf\u7684\u5408\u529b\u4e3a\u96f6\u65f6\uff0c\u6ee1\u8db3\u7b2c\u4e00\u4e2a\u5e73\u8861\u6761\u4ef6\u3002\u6362\u53e5\u8bdd\u8bf4\uff0c\u5f53\u6ee1\u8db3\u4ee5\u4e0b\u516c\u5f0f\u65f6\uff0c\u7b2c\u4e00\u4e2a\u5e73\u8861\u6761\u4ef6\u6210\u7acb\uff1a<\/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-b6be8a8a29e6933d96cdf943ceb09119_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\displaystyle \\sum \\vv{F}=0\" title=\"Rendered by QuickLaTeX.com\" height=\"25\" width=\"75\" style=\"vertical-align: -8px;\"><\/p>\n<\/p>\n<p>\u6b64\u5916\uff0c\u5f53\u6ee1\u8db3\u7b2c\u4e00\u5e73\u8861\u6761\u4ef6\u65f6\uff0c\u7269\u4f53\u5904\u4e8e\u9759\u6b62\u6216\u5300\u901f\u8fd0\u52a8\u3002\u56e0\u4e3a\u5982\u679c\u529b\u7684\u603b\u548c\u4e3a\u96f6\uff0c\u7269\u4f53\u5c31\u4e0d\u53ef\u80fd\u6709\u52a0\u901f\u5ea6\u3002<\/p>\n<p>\u4ece\u903b\u8f91\u4e0a\u8bb2\uff0c\u4e3a\u4e86\u9a8c\u8bc1\u7b2c\u4e00\u4e2a\u5e73\u8861\u6761\u4ef6\uff0c\u5fc5\u987b\u4ee5\u77e2\u91cf\u65b9\u5f0f\u6dfb\u52a0\u529b\uff0c\u800c\u4e0d\u662f\u6a21\u5757\u3002\u6362\u53e5\u8bdd\u8bf4\uff0c\u5982\u679c\u6bcf\u4e2a\u8f74\u4e0a\u7684\u529b\u4e4b\u548c\u4e3a\u96f6\uff0c\u5219\u521a\u4f53\u5904\u4e8e\u673a\u68b0\u5e73\u8861\u3002<\/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-9d6873586b63ccddf575a8ee1c7f5137_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\displaystyle \\sum\\vv{F_x}=0\\qquad\\sum\\vv{F_y}=0\\qquad\\sum\\vv{F_z}=0\" title=\"Rendered by QuickLaTeX.com\" height=\"25\" width=\"319\" style=\"vertical-align: -8px;\"><\/p>\n<\/p>\n<p>\u56e0\u6b64\uff0c\u68c0\u67e5\u662f\u5426\u6ee1\u8db3\u7b2c\u4e00\u4e2a\u5e73\u8861\u6761\u4ef6\u7684\u4e00\u79cd\u65b9\u6cd5\u662f\u5c06\u6bcf\u4e2a\u8f74\u4e0a\u7684\u6240\u6709\u529b\u5206\u522b\u76f8\u52a0\uff0c\u5982\u679c\u6240\u6709\u603b\u548c\u4e3a\u96f6\uff0c\u5219\u7269\u4f53\u5904\u4e8e\u5e73\u52a8\u5e73\u8861\u3002 <\/p>\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full is-resized\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/premiere-condition-dequilibre.png\" alt=\"\u5e73\u8861\u7684\u7b2c\u4e00\u4e2a\u6761\u4ef6\" class=\"wp-image-368\" width=\"307\" height=\"307\" srcset=\"https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/premiere-condition-dequilibre-300x300.png 300w, https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/premiere-condition-dequilibre-150x150.png 150w, https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/premiere-condition-dequilibre-768x766.png 768w, https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/premiere-condition-dequilibre.png 1006w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\"><\/figure>\n<\/div>\n<p>\u8bf7\u6ce8\u610f\uff0c\u6709\u4e24\u79cd\u7c7b\u578b\u7684\u5e73\u79fb\u5e73\u8861\uff1a<\/p>\n<ul>\n<li><strong>\u9759\u6001\u5e73\u79fb\u5e73\u8861<\/strong>\uff1a\u5f53\u6ee1\u8db3\u7b2c\u4e00\u4e2a\u5e73\u8861\u6761\u4ef6\u5e76\u4e14\u7269\u4f53\u4e5f\u5904\u4e8e\u9759\u6b62\u72b6\u6001\u65f6\u3002<\/li>\n<li><strong>\u52a8\u6001\u5e73\u79fb\u5e73\u8861<\/strong>\uff1a\u5f53\u6ee1\u8db3\u7b2c\u4e00\u4e2a\u5e73\u8861\u6761\u4ef6\u5e76\u4e14\u7269\u4f53\u5177\u6709\u6052\u5b9a\u901f\u5ea6\uff08\u4e0d\u540c\u4e8e\u96f6\uff09\u65f6\u3002 <\/li>\n<\/ul>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Ejemplos-de-la-primera-condicion-de-equilibrio\"><\/span>\u7b2c\u4e00\u5e73\u8861\u6761\u4ef6\u7684\u793a\u4f8b<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u4e00\u65e6\u6211\u4eec\u77e5\u9053\u4e86\u7b2c\u4e00\u4e2a\u5e73\u8861\u6761\u4ef6\u7684\u5b9a\u4e49\uff0c\u60a8\u53ef\u4ee5\u770b\u5230\u4e0b\u9762\u4e09\u4e2a\u4e0d\u540c\u7684\u4f8b\u5b50\u6765\u5b8c\u5168\u7406\u89e3\u5b83\u7684\u542b\u4e49\u3002<\/p>\n<p>\u4ea4\u901a\u706f\u662f\u65e5\u5e38\u751f\u6d3b\u4e2d\u5e73\u8861\u7684\u9996\u8981\u6761\u4ef6\u7684\u4e00\u4e2a\u4f8b\u5b50\u3002\u6211\u4eec\u7ecf\u5e38\u770b\u5230\u8857\u4e0a\u6302\u7740\u7684\u6807\u724c\uff0c\u5b83\u4eec\u603b\u662f\u5904\u4e8e\u9759\u6b62\u72b6\u6001\uff08\u5b83\u4eec\u662f\u76f4\u7acb\u7684\uff0c\u4e0d\u4f1a\u5012\u4e0b\uff09\uff0c\u56e0\u6b64\u4fdd\u6301\u5e73\u8861\u3002<\/p>\n<p>\u540c\u6837\uff0c\u4efb\u4f55\u9759\u6b62\u5728\u5730\u9762\u4e0a\u7684\u7269\u4f53\u90fd\u5904\u4e8e\u529b\u5e73\u8861\u72b6\u6001\uff0c\u6216\u8005\u6362\u53e5\u8bdd\u8bf4\uff0c\u5b83\u6ee1\u8db3\u5e73\u8861\u7684\u7b2c\u4e00\u4e2a\u6761\u4ef6\u3002\u56e0\u4e3a\u65bd\u52a0\u5728\u8eab\u4f53\u4e0a\u7684\u552f\u4e00\u529b\u662f\u91cd\u529b\u548c\u6cd5\u5411\u529b\uff0c\u5e76\u4e14\u8fd9\u4e24\u79cd\u529b\u662f\u76f8\u4e92\u5bf9\u6297\u7684\u3002 <\/p>\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full is-resized\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/equilibre-des-forces.png\" alt=\"\u529b\u91cf\u7684\u5747\u8861\" class=\"wp-image-294\" width=\"319\" height=\"252\" srcset=\"https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/equilibre-des-forces-300x238.png 300w, https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/equilibre-des-forces-768x610.png 768w, https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/equilibre-des-forces.png 852w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\"><\/figure>\n<\/div>\n<p>\u6700\u540e\uff0c\u7b2c\u4e00\u5e73\u8861\u6761\u4ef6\u7684\u53e6\u4e00\u4e2a\u4f8b\u5b50\u662f\u6c7d\u8f66\u5728\u9ad8\u901f\u516c\u8def\u4e0a\u5300\u901f\u884c\u9a76\u3002\u4efb\u4f55\u4ee5\u6052\u5b9a\u901f\u5ea6\u8fd0\u52a8\u7684\u7269\u4f53\u610f\u5473\u7740\u5b83\u7684\u52a0\u901f\u5ea6\u4e3a\u96f6\uff0c\u56e0\u6b64\u65bd\u52a0\u5230\u5b83\u7684\u529b\u7684\u603b\u548c\u4e5f\u4e3a\u96f6\u3002 <\/p>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Ejercicios-resueltos-de-la-primera-condicion-de-equilibrio\"><\/span>\u89e3\u51b3\u4e86\u7b2c\u4e00\u5e73\u8861\u6761\u4ef6\u7684\u95ee\u9898<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3 class=\"wp-block-heading\">\u7ec3\u4e601<\/h3>\n<p>\u7ed9\u5b9a\u4e00\u4e2a\u8d28\u91cf\u4e3a 12 kg \u7684\u521a\u4f53\uff0c\u7531\u4e24\u6839\u7ef3\u5b50\u60ac\u6302\uff0c\u5176\u89d2\u5ea6\u5982\u4e0b\u56fe\u6240\u793a\uff0c\u8ba1\u7b97\u6bcf\u6839\u7ef3\u5b50\u5fc5\u987b\u65bd\u52a0\u7684\u529b\u624d\u80fd\u4fdd\u6301\u521a\u4f53\u4fdd\u6301\u5e73\u8861\u3002 <\/p>\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full is-resized\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/probleme-de-premiere-condition-dequilibre.png\" alt=\"\u7b2c\u4e00\u5e73\u8861\u6761\u4ef6\u95ee\u9898\" class=\"wp-image-372\" width=\"243\" height=\"243\" srcset=\"https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/probleme-de-premiere-condition-dequilibre-300x300.png 300w, https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/probleme-de-premiere-condition-dequilibre-150x150.png 150w, https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/probleme-de-premiere-condition-dequilibre.png 600w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\"><\/figure>\n<\/div>\n<div class=\"wp-block-otfm-box-spoiler-start otfm-sp__wrapper otfm-sp__box js-otfm-sp-box__closed otfm-sp__FFF8E1\" role=\"button\" tabindex=\"0\" aria-expanded=\"false\" data-otfm-spc=\"#FFF8E1\" style=\"text-align:center\">\n<div class=\"otfm-sp__title\"><strong>\u67e5\u770b\u89e3\u51b3\u65b9\u6848<\/strong><\/div>\n<\/div>\n<p class=\"has-text-align-left\">\u89e3\u51b3\u8fd9\u7c7b\u95ee\u9898\u6211\u4eec\u9996\u5148\u8981\u505a\u7684\u662f\u753b\u51fa\u4eba\u7269\u7684\u81ea\u7531\u4f53\u56fe\uff1a <\/p>\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full is-resized\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/exercice-resolu-de-la-premiere-condition-dequilibre.png\" alt=\"\u89e3\u51b3\u4e86\u5e73\u8861\u7b2c\u4e00\u6761\u4ef6\u7684\u7ec3\u4e60\" class=\"wp-image-375\" width=\"282\" height=\"335\" srcset=\"https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/exercice-resolu-de-la-premiere-condition-dequilibre-252x300.png 252w, https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/exercice-resolu-de-la-premiere-condition-dequilibre.png 600w\" sizes=\"auto, (max-width: 252px) 100vw, 252px\"><\/figure>\n<\/div>\n<p class=\"has-text-align-left\">\u8bf7\u6ce8\u610f\uff0c\u5b9e\u9645\u4e0a\u53ea\u6709\u4e09\u4e2a\u529b\u4f5c\u7528\u5728\u60ac\u6302\u7684\u7269\u4f53\u4e0a\uff0c\u5373\u91cd\u91cf P \u7684\u529b\u548c\u5f26\u7684\u5f20\u529b T <sub>1<\/sub>\u548c T <sub>2<\/sub> \u3002 T <sub>1x<\/sub> \u3001T <sub>1y<\/sub> \u3001T <sub>2x<\/sub>\u548cT <sub>2y<\/sub>\u8868\u793a\u7684\u529b\u5206\u522b\u662fT <sub>1<\/sub>\u548cT <sub>2<\/sub>\u7684\u77e2\u91cf\u5206\u91cf\u3002<\/p>\n<p class=\"has-text-align-left\">\u56e0\u6b64\uff0c\u7531\u4e8e\u6211\u4eec\u77e5\u9053\u5f26\u7684\u503e\u659c\u89d2\u5ea6\uff0c\u6211\u4eec\u53ef\u4ee5\u627e\u5230\u5f20\u529b\u77e2\u91cf\u5206\u91cf\u7684\u8868\u8fbe\u5f0f\uff1a<\/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-bc09423d2d10435101c7d6b087add524_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\" T_{1x}=T_1\\cdot \\text{cos}(20\u00ba)\" title=\"Rendered by QuickLaTeX.com\" height=\"19\" width=\"135\" style=\"vertical-align: -5px;\"><\/p>\n<\/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-0603d4b02835532dcefe2290484067fb_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\" T_{1y}=T_1\\cdot \\text{sin}(20\u00ba)\" title=\"Rendered by QuickLaTeX.com\" height=\"20\" width=\"133\" style=\"vertical-align: -6px;\"><\/p>\n<\/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-0b10a6fc64a1a84b9f4f2c47b7990766_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\" T_{2x}=T_2\\cdot \\text{cos}(55\u00ba)\" title=\"Rendered by QuickLaTeX.com\" height=\"19\" width=\"135\" style=\"vertical-align: -5px;\"><\/p>\n<\/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-3e7a1dc2ffa7eb20e5e2d9346f0b96a2_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\" T_{2y}=T_2\\cdot \\text{sin}(55\u00ba)\" title=\"Rendered by QuickLaTeX.com\" height=\"20\" width=\"133\" style=\"vertical-align: -6px;\"><\/p>\n<\/p>\n<p class=\"has-text-align-left\">\u53e6\u4e00\u65b9\u9762\uff0c\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u5e94\u7528\u91cd\u529b\u516c\u5f0f\u6765\u8ba1\u7b97\u91cd\u7269\u7684\u529b\uff1a<\/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-da2fc72dc768050ef84d2a3c9ee4a281_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"P=m\\cdot g=12\\cdot 9,81 =117,72 \\N\" title=\"Rendered by QuickLaTeX.com\" height=\"17\" width=\"239\" style=\"vertical-align: -4px;\"><\/p>\n<\/p>\n<p class=\"has-text-align-left\"> \u95ee\u9898\u9648\u8ff0\u544a\u8bc9\u6211\u4eec\uff0c\u7269\u4f53\u5904\u4e8e\u5e73\u8861\u72b6\u6001\uff0c\u56e0\u6b64\u5782\u76f4\u529b\u7684\u603b\u548c\u4e0e\u6c34\u5e73\u529b\u7684\u603b\u548c\u5fc5\u987b\u7b49\u4e8e\u96f6\u3002\u56e0\u6b64\u6211\u4eec\u53ef\u4ee5\u5efa\u7acb\u529b\u65b9\u7a0b\u5e76\u5c06\u5176\u8bbe\u7f6e\u4e3a\u96f6\uff1a<\/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-6532044e76d6b9246f64624159b08c33_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"-T_{1x}+T_{2x}=0\" title=\"Rendered by QuickLaTeX.com\" height=\"15\" width=\"119\" style=\"vertical-align: -3px;\"><\/p>\n<\/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-52aadf04437252b1f9c17107dfc16a84_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"T_{1y}+T_{2y}-P=0\" title=\"Rendered by QuickLaTeX.com\" height=\"18\" width=\"140\" style=\"vertical-align: -6px;\"><\/p>\n<\/p>\n<p class=\"has-text-align-left\">\u73b0\u5728\uff0c\u6211\u4eec\u7528\u4e4b\u524d\u627e\u5230\u7684\u8868\u8fbe\u5f0f\u66ff\u6362\u7ea6\u675f\u7684\u7ec4\u6210\u90e8\u5206\uff1a<\/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-4a4993c55ab7f27b6c0b67793ee5ff8a_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"-T_1\\cdot\\text{cos}(20\u00ba)+T_2\\cdot \\text{cos}(55\u00ba)=0\" title=\"Rendered by QuickLaTeX.com\" height=\"19\" width=\"239\" style=\"vertical-align: -5px;\"><\/p>\n<\/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-204773c167037418680872592d118315_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"T_1\\cdot \\text{sin}(20\u00ba)+T_2\\cdot \\text{sin}(55\u00ba)-117.72=0\" title=\"Rendered by QuickLaTeX.com\" height=\"19\" width=\"293\" style=\"vertical-align: -5px;\"><\/p>\n<\/p>\n<p class=\"has-text-align-left\">\u6700\u540e\uff0c\u6211\u4eec\u6c42\u89e3\u65b9\u7a0b\u7ec4\u4ee5\u83b7\u5f97\u529b T <sub>1<\/sub>\u548c T <sub>2<\/sub>\u7684\u503c\uff1a <\/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-5ce6dd2d7dce6ba9d2e8c66e50e628b6_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\left.\\begin{array}{l}-T_1\\cdot 0,94+T_2\\cdot 0,57=0\\\\[2ex]T_1\\cdot 0,34+T_2\\cdot 0,82-117 .72=0\\end{array }\\right\\} \\longrightarrow \\ \\begin{array}{c}T_1=69,56 \\ N\\\\[2ex]T_2=114,74 \\ N\\end{array}[\/ latex] \n\n<div class=&quot;wp-block-otfm-box-spoiler-end otfm-sp_end&quot;><\/div>\n<h3 class=&quot;wp-block-heading&quot;> Exercice 2<\/h3>\n<p> Comme le montre la figure suivante, deux objets sont reli\u00e9s par une corde et une poulie de masses n\u00e9gligeables. Si l&#8217;objet 2 a une masse de 7 kg et que la pente de la rampe est de 50\u00ba, calculez la masse de l&#8217;objet 1 pour que l&#8217;ensemble du syst\u00e8me soit dans des conditions d&#8217;\u00e9quilibre. Dans ce cas, la force de frottement peut \u00eatre n\u00e9glig\u00e9e. <\/p>\n<div class=&quot;wp-block-image&quot;>\n<figure class=&quot;aligncenter size-full is-resized&quot;><img decoding=&quot;async&quot; loading=&quot;lazy&quot; src=&quot;https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/probleme-dequilibre-des-forces.png&quot; alt=&quot;probl\u00e8me d'\u00e9quilibre translationnel&quot; class=&quot;wp-image-295&quot; width=&quot;299&quot; height=&quot;240&quot; srcset=&quot;https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/probleme-dequilibre-des-forces-300x241.png 300w, https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/probleme-dequilibre-des-forces.png 718w&quot; sizes=&quot;(max-width: 300px) 100vw, 300px&quot;><\/figure>\n<\/div>\n<div class=&quot;wp-block-otfm-box-spoiler-start otfm-sp__wrapper otfm-sp__box js-otfm-sp-box__closed otfm-sp__FFF8E1&quot; role=&quot;button&quot; tabindex=&quot;0&quot; aria-expanded=&quot;false&quot; data-otfm-spc=&quot;#FFF8E1&quot; style=&quot;text-align:center&quot;>\n<div class=&quot;otfm-sp__title&quot;> <strong>Voir la solution<\/strong><\/div>\n<\/div>\n<p> Le corps 1 est sur une pente inclin\u00e9e, donc la premi\u00e8re chose \u00e0 faire est de d\u00e9composer vectoriellement la force de son poids pour avoir les forces dans les axes de la pente : [latex]P_{1x}=P_1\\cdot \\text{sin}(\\alpha)&#8221; title=&#8221;Rendered by QuickLaTeX.com&#8221; height=&#8221;340&#8243; width=&#8221;2876&#8243; style=&#8221;vertical-align: 0px;&#8221;><\/p>\n<\/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-1a0b77602980cc17cce9b3baef744df8_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"P_{1y}=P_1\\cdot \\text{cos}(\\alpha)\" title=\"Rendered by QuickLaTeX.com\" height=\"20\" width=\"130\" style=\"vertical-align: -6px;\"><\/p>\n<\/p>\n<p class=\"has-text-align-left\">\u56e0\u6b64\uff0c\u4f5c\u7528\u5728\u6574\u4e2a\u7cfb\u7edf\u4e0a\u7684\u4e00\u7ec4\u529b\u662f\uff1a <\/p>\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full is-resized\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/exercice-resolu-equilibre-des-forces.png\" alt=\"\u5e73\u79fb\u5e73\u8861\u7ec3\u4e60\u5df2\u89e3\u51b3\" class=\"wp-image-296\" width=\"338\" height=\"272\" srcset=\"https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/exercice-resolu-equilibre-des-forces-300x241.png 300w, https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/exercice-resolu-equilibre-des-forces.png 718w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\"><\/figure>\n<\/div>\n<p class=\"has-text-align-left\">\u95ee\u9898\u9648\u8ff0\u544a\u8bc9\u6211\u4eec\uff0c\u529b\u7cfb\u7edf\u5904\u4e8e\u5e73\u8861\u72b6\u6001\uff0c\u56e0\u6b64\u4e24\u4e2a\u7269\u4f53\u5fc5\u987b\u5904\u4e8e\u5e73\u8861\u72b6\u6001\u3002\u6839\u636e\u8fd9\u4e9b\u4fe1\u606f\uff0c\u6211\u4eec\u53ef\u4ee5\u63d0\u51fa\u4e24\u4e2a\u7269\u4f53\u7684\u5e73\u8861\u65b9\u7a0b\uff1a <\/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-ed082b4f064316ab20fb0d26054d3010_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"1\\ \\rightarrow \\ \\begin{cases}P_{1x}=T\\\\[2ex]P_{1y}=N\\end{cases} \\qquad\\qquad 2 \\ \\rightarrow \\ T=P_2[\/latex ] Ainsi, la composante du poids de l'objet 1 inclin\u00e9 dans le sens de la pente doit \u00eatre \u00e9gale au poids de l'objet 2 : [latex]P_{1x}=P_2\" title=\"Rendered by QuickLaTeX.com\" height=\"87\" width=\"1160\" style=\"vertical-align: 0px;\"><\/p>\n<\/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-4e1b75b6ba5d7bbe88d23e014eb011c5_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"P_1\\cdot \\text{sin}(\\alpha)=P_2\" title=\"Rendered by QuickLaTeX.com\" height=\"19\" width=\"120\" style=\"vertical-align: -5px;\"><\/p>\n<\/p>\n<p class=\"has-text-align-left\">\u73b0\u5728\u6211\u4eec\u5e94\u7528\u91cd\u529b\u516c\u5f0f\u5e76\u7b80\u5316\u65b9\u7a0b\uff1a <\/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-06a53a846ad5bc034f69fa05488404c4_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"m_1\\cdot g \\cdot \\text{sin}(\\alpha) =m_2 \\cdot g\" title=\"Rendered by QuickLaTeX.com\" height=\"19\" width=\"174\" style=\"vertical-align: -5px;\"><\/p>\n<\/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-802fde26f3388538d766a709d60cf48b_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"m_1 \\cdot \\text{sin}(\\alpha) =m_2\" title=\"Rendered by QuickLaTeX.com\" height=\"19\" width=\"130\" style=\"vertical-align: -5px;\"><\/p>\n<\/p>\n<p class=\"has-text-align-left\">\u6700\u540e\uff0c\u6211\u4eec\u66ff\u6362\u6570\u636e\u5e76\u6c42\u89e3\u7269\u4f53 1 \u7684\u8d28\u91cf\uff1a <\/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-0457f85ca65afde96b2e575ce54869dd_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"m_1 \\cdot \\text{sin}(50\u00ba) =7\" title=\"Rendered by QuickLaTeX.com\" height=\"19\" width=\"122\" style=\"vertical-align: -5px;\"><\/p>\n<\/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-9a26d132815a0ce878a6ad874c8b40b0_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"m_1 =\\cfrac{7}{\\text{sin}(50\u00ba)}\" title=\"Rendered by QuickLaTeX.com\" height=\"44\" width=\"103\" style=\"vertical-align: -17px;\"><\/p>\n<\/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-6e80f0daabb2167ec2f6622b08001a97_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"m_1=9,14 \\ kg\" title=\"Rendered by QuickLaTeX.com\" height=\"16\" width=\"106\" style=\"vertical-align: -4px;\"><\/p>\n<\/p>\n<div class=\"wp-block-otfm-box-spoiler-end otfm-sp_end\"><\/div>\n","protected":false},"excerpt":{"rendered":"<p>\u672c\u6587\u89e3\u91ca\u4e86\u7b2c\u4e00\u4e2a\u5e73\u8861\u6761\u4ef6\u7684\u7ec4\u6210\u3002\u60a8\u8fd8\u5c06\u627e\u5230\u7b2c\u4e00\u4e2a\u5e73\u8861\u6761\u4ef6\u7684\u771f\u5b9e\u793a\u4f8b\uff0c\u6700\u540e\uff0c\u60a8\u5c06\u80fd\u591f\u901a\u8fc7\u89e3\u51b3\u8be5\u4e3b\u9898\u7684\u7ec3\u4e60\u8fdb\u884c\u7ec3\u4e60 &hellip;<\/p>\n<p class=\"read-more\"> <a class=\"\" href=\"https:\/\/physigeek.com\/cn\/%e7%ac%ac%e4%b8%80%e5%b9%b3%e8%a1%a1%e6%9d%a1%e4%bb%b6\/\"> <span class=\"screen-reader-text\">\u5e73\u8861\u7684\u9996\u8981\u6761\u4ef6<\/span> \u67e5\u770b\u5168\u6587 &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":[5],"tags":[],"class_list":["post-21","post","type-post","status-publish","format-standard","hentry","category-5"],"yoast_head":"<!-- This site is optimized 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