{"id":23,"date":"2023-06-27T11:34:58","date_gmt":"2023-06-27T11:34:58","guid":{"rendered":"https:\/\/physigeek.com\/cn\/%e5%b9%b3%e8%a1%a1%e6%9d%a1%e4%bb%b6\/"},"modified":"2023-06-27T11:34:58","modified_gmt":"2023-06-27T11:34:58","slug":"%e5%b9%b3%e8%a1%a1%e6%9d%a1%e4%bb%b6","status":"publish","type":"post","link":"https:\/\/physigeek.com\/cn\/%e5%b9%b3%e8%a1%a1%e6%9d%a1%e4%bb%b6\/","title":{"rendered":"\u5e73\u8861\u6761\u4ef6"},"content":{"rendered":"<p>\u672c\u6587\u89e3\u91ca\u4ec0\u4e48\u662f\u5e73\u8861\u6761\u4ef6\u3002\u60a8\u5c06\u627e\u5230\u4e24\u79cd\u5e73\u8861\u6761\u4ef6\u7684\u771f\u5b9e\u793a\u4f8b\uff0c\u6b64\u5916\uff0c\u60a8\u5c06\u80fd\u591f\u901a\u8fc7\u9010\u6b65\u89e3\u51b3\u7684\u7ec3\u4e60\u8fdb\u884c\u8bad\u7ec3\u3002 <\/p>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%C2%BFCuales-son-las-condiciones-de-equilibrio\"><\/span>\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\u6761\u4ef6<\/strong>\u8868\u660e\uff0c\u5982\u679c\u65bd\u52a0\u5728\u7269\u4f53\u4e0a\u7684\u529b\u548c\u529b\u77e9\u7684\u603b\u548c\u4e3a\u96f6\uff0c\u5219\u7269\u4f53\u5904\u4e8e\u5e73\u8861\u72b6\u6001\u3002<\/p>\n<p>\u6240\u4ee5\u5e73\u8861\u6709\u4e24\u4e2a\u6761\u4ef6\uff1a\u7b2c\u4e00\u4e2a\u6761\u4ef6\u662f\u5408\u529b\u5fc5\u987b\u4e3a\u96f6\uff0c\u7b2c\u4e8c\u4e2a\u6761\u4ef6\u662f\u5408\u529b\u77e9\u5fc5\u987b\u4e3a\u96f6\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\/conditions-dequilibre.png\" alt=\"\u5e73\u8861\u6761\u4ef6\" class=\"wp-image-416\" width=\"258\" height=\"258\" srcset=\"https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/conditions-dequilibre-300x300.png 300w, https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/conditions-dequilibre-150x150.png 150w, https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/conditions-dequilibre.png 514w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\"><\/figure>\n<\/div>\n<p>\u8bf7\u8bb0\u4f4f\uff0c\u8981\u4f7f\u7cfb\u7edf\u5904\u4e8e\u5e73\u8861\u72b6\u6001\uff0c\u5fc5\u987b\u6ee1\u8db3\u4e24\u4e2a\u65b9\u7a0b\uff0c\u4ec5\u6ee1\u8db3\u4e00\u4e2a\u6761\u4ef6\u662f\u4e0d\u591f\u7684\u3002 <\/p>\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Primera-condicion-de-equilibrio\"><\/span>\u5e73\u8861\u7684\u9996\u8981\u6761\u4ef6<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><strong>\u7b2c\u4e00\u4e2a\u5e73\u8861\u6761\u4ef6<\/strong>\u8868\u793a\uff0c\u65bd\u52a0\u5230\u7269\u4f53\u4e0a\u7684\u529b\u7684\u603b\u548c\u5fc5\u987b\u7b49\u4e8e\u96f6\uff0c\u4ee5\u4f7f\u6240\u8ff0\u7269\u4f53\u5904\u4e8e\u5e73\u79fb\u5e73\u8861\u3002<\/p>\n<p>\u4ece\u903b\u8f91\u4e0a\u8bb2\uff0c\u6240\u6709\u4e09\u4e2a\u8f74\u7684\u529b\u4e4b\u548c\u5fc5\u987b\u4e3a\u96f6\uff0c\u5982\u679c\u5728\u4efb\u4f55\u8f74\u4e0a\u90fd\u4e0d\u6ee1\u8db3\uff0c\u5219\u8eab\u4f53\u4e0d\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>\u6b64\u5916\uff0c\u5982\u679c\u529b\u7684\u603b\u548c\u4e3a\u96f6\uff0c\u5219\u610f\u5473\u7740\u7269\u4f53\u6ca1\u6709\u7ebf\u6027\u52a0\u901f\u5ea6\u3002\u56e0\u6b64\uff0c\u5904\u4e8e\u5e73\u79fb\u5e73\u8861\u7684\u7269\u4f53\u53ef\u4ee5\u5904\u4e8e\u9759\u6b62\u72b6\u6001\uff08\u96f6\u901f\u5ea6\uff09\u6216\u4ee5\u6052\u5b9a\u7ebf\u901f\u5ea6\u79fb\u52a8\u3002<\/p>\n<p>\u4ece\u8fd9\u91cc\uff0c\u53ef\u4ee5\u533a\u5206\u4e24\u79cd\u7c7b\u578b\u7684\u7ffb\u8bd1\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<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Segunda-condicion-de-equilibrio\"><\/span>\u7b2c\u4e8c\u4e2a\u5e73\u8861\u6761\u4ef6<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u7b2c\u4e8c\u5e73\u8861\u6761\u4ef6\u4e0e\u7b2c\u4e00\u5e73\u8861\u6761\u4ef6\u7c7b\u4f3c\uff0c\u4f46\u4f7f\u7528\u529b\u77e9\u800c\u4e0d\u662f\u529b\u3002<\/p>\n<p><strong>\u7b2c\u4e8c\u4e2a\u5e73\u8861\u6761\u4ef6<\/strong>\u8868\u793a\uff0c\u5982\u679c\u7269\u4f53\u7684\u529b\u77e9\u603b\u548c\u4e3a\u96f6\uff0c\u5219\u7269\u4f53\u5904\u4e8e\u65cb\u8f6c\u5e73\u8861\u3002<\/p>\n<p>\u540c\u6837\uff0c\u6846\u67b6\u6240\u6709\u8f74\u4e0a\u7684\u529b\u77e9\u603b\u548c\u5fc5\u987b\u4e3a\u96f6\uff0c\u5426\u5219\u65e0\u6cd5\u9a8c\u8bc1\u7b2c\u4e8c\u4e2a\u5e73\u8861\u6761\u4ef6\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-ef043ee3ac4a59374afc86a86f450df6_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\displaystyle \\sum\\vv{M_x}=0\\qquad\\sum\\vv{M_y}=0\\qquad\\sum\\vv{M_z}=0\" title=\"Rendered by QuickLaTeX.com\" height=\"25\" width=\"336\" style=\"vertical-align: -8px;\"><\/p>\n<\/p>\n<p>\u8bf7\u8bb0\u4f4f\uff0c\u529b\u5728\u4e00\u70b9\u4e0a\u7684\u529b\u77e9\uff08\u6216\u626d\u77e9\uff09\u662f\u901a\u8fc7\u5c06\u529b\u7684\u503c\u4e58\u4ee5\u529b\u5230\u8be5\u70b9\u7684\u5782\u76f4\u8ddd\u79bb\u6765\u8ba1\u7b97\u7684\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-765ae97c83695144c85bb65446416345_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"M=F\\cdot d\" title=\"Rendered by QuickLaTeX.com\" height=\"12\" width=\"79\" style=\"vertical-align: 0px;\"><\/p>\n<\/p>\n<p>\u7c7b\u4f3c\u5730\uff0c\u4e3a\u4e86\u6ee1\u8db3\u7b2c\u4e8c\u4e2a\u5e73\u8861\u6761\u4ef6\uff0c\u7269\u4f53\u7684\u89d2\u52a0\u901f\u5ea6\u5fc5\u987b\u4e3a\u96f6\uff0c\u8fd9\u610f\u5473\u7740\u5728\u8fd9\u79cd\u72b6\u6001\u4e0b\u7269\u4f53\u4e0d\u65cb\u8f6c\u6216\u4ee5\u6052\u5b9a\u89d2\u901f\u5ea6\u65cb\u8f6c\u3002 <\/p>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Ejemplos-de-las-condiciones-de-equilibrio\"><\/span>\u5e73\u8861\u6761\u4ef6\u7684\u4f8b\u5b50<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u770b\u5b8c\u8fd9\u4e24\u4e2a\u5e73\u8861\u6761\u4ef6\u7684\u5b9a\u4e49\u540e\uff0c\u60a8\u5c06\u80fd\u591f\u770b\u5230\u4e0b\u9762\u51e0\u4e2a\u65e5\u5e38\u751f\u6d3b\u4e2d\u7684\u4f8b\u5b50\u6765\u5145\u5206\u7406\u89e3\u8fd9\u4e2a\u6982\u5ff5\u3002<\/p>\n<p>\u4f8b\u5982\uff0c\u5f53\u8eab\u4f53\u60ac\u6302\u5728\u5929\u82b1\u677f\u4e0a\u65f6\uff0c\u8eab\u4f53\u5904\u4e8e\u5e73\u8861\u72b6\u6001\uff0c\u56e0\u4e3a\u7cfb\u7edf\u5b8c\u5168\u9759\u6b62\u3002\u6211\u4eec\u4e5f\u53ef\u4ee5\u8bf4\u7cfb\u7edf\u5904\u4e8e\u9759\u6001\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>\u65e5\u5e38\u751f\u6d3b\u4e2d\u5e73\u8861\u6761\u4ef6\u7684\u53e6\u4e00\u4e2a\u4f8b\u5b50\u662f\u79e4\u3002\u5f53\u5e73\u8861\u81c2\u7a33\u5b9a\u5e76\u505c\u6b62\u65cb\u8f6c\u65f6\uff0c\u7cfb\u7edf\u5904\u4e8e\u9759\u6b62\u72b6\u6001\uff0c\u56e0\u6b64\u4e5f\u5904\u4e8e\u5e73\u8861\u72b6\u6001\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\/deuxieme-condition-dequilibre.png\" alt=\"\u7b2c\u4e8c\u4e2a\u5e73\u8861\u6761\u4ef6\" class=\"wp-image-430\" width=\"286\" height=\"286\" srcset=\"https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/deuxieme-condition-dequilibre-300x300.png 300w, https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/deuxieme-condition-dequilibre-150x150.png 150w, https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/deuxieme-condition-dequilibre-768x768.png 768w, https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/deuxieme-condition-dequilibre.png 781w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\"><\/figure>\n<\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Ejercicios-resueltos-de-las-condiciones-de-equilibrio\"><\/span>\u89e3\u51b3\u4e86\u5e73\u8861\u6761\u4ef6\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-694655a52049a536489cebbaef3bc7a2_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> Calculer le moment que doit faire le support de la poutre suivante pour qu&#8217;elle soit en \u00e9quilibre de rotation : <\/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\/exercice-resolu-deuxieme-condition-dequilibre.png&quot; alt=&quot;Exercice r\u00e9solu de la deuxi\u00e8me condition d'\u00e9quilibre&quot; class=&quot;wp-image-397&quot; width=&quot;237&quot; height=&quot;203&quot; srcset=&quot;https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/exercice-resolu-deuxieme-condition-dequilibre-300x257.png 300w, https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/exercice-resolu-deuxieme-condition-dequilibre.png 643w&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> Pour que la poutre soit en \u00e9quilibre de rotation et que la deuxi\u00e8me condition d&#8217;\u00e9quilibre soit donc remplie, le support doit contrecarrer le moment de torsion g\u00e9n\u00e9r\u00e9 par la force, donc la somme des moments sera nulle. On calcule donc le moment (ou couple) g\u00e9n\u00e9r\u00e9 par la force au niveau de l&#8217;appui : [latex]M_{force}=13\\cdot 9 = 117 \\ Nm&#8221; title=&#8221;Rendered by QuickLaTeX.com&#8221; height=&#8221;343&#8243; width=&#8221;3353&#8243; style=&#8221;vertical-align: 0px;&#8221;><\/p>\n<\/p>\n<p class=\"has-text-align-left\"> \u73b0\u5728\u6211\u4eec\u5217\u51fa\u529b\u77e9\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-fdac8512edbbe2c1b6396ee43a776261_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"M_{support}+M_{force}=0\" title=\"Rendered by QuickLaTeX.com\" height=\"18\" width=\"170\" style=\"vertical-align: -6px;\"><\/p>\n<\/p>\n<p class=\"has-text-align-left\"> \u4ea7\u751f\u529b\u7684\u529b\u77e9\u901a\u8fc7\u5c4f\u5e55\u5185\u90e8\uff0c\u56e0\u6b64\u5176\u7b26\u53f7\u4e3a\u8d1f\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-b654ae9d3ab78a23e2f7235a7742a503_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"M_{support}-117=0\" title=\"Rendered by QuickLaTeX.com\" height=\"19\" width=\"145\" style=\"vertical-align: -6px;\"><\/p>\n<\/p>\n<p class=\"has-text-align-left\"> \u6700\u540e\uff0c\u6211\u4eec\u6c42\u89e3\u65b9\u7a0b\u4e2d\u7684\u672a\u77e5\u6570\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-cfe550481f3747f9121d30c3f35f7f85_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"M_{support}=117\\Nm\" title=\"Rendered by QuickLaTeX.com\" height=\"19\" width=\"115\" style=\"vertical-align: -6px;\"><\/p>\n<\/p>\n<p class=\"has-text-align-left\"> \u6240\u83b7\u5f97\u7684\u65f6\u523b\u5177\u6709\u6b63\u53f7\uff0c\u56e0\u6b64\u5176\u610f\u4e49\u5728\u5c4f\u5e55\u4e4b\u5916\u3002<\/p>\n<div class=\"wp-block-otfm-box-spoiler-end otfm-sp_end\"><\/div>\n<h3 class=\"wp-block-heading\">\u7ec3\u4e603<\/h3>\n<p>\u5982\u4e0b\u56fe\u6240\u793a\uff0c\u4e24\u4e2a\u7269\u4f53\u901a\u8fc7\u4e00\u6839\u7ef3\u5b50\u548c\u4e00\u4e2a\u8d28\u91cf\u53ef\u4ee5\u5ffd\u7565\u4e0d\u8ba1\u7684\u6ed1\u8f6e\u8fde\u63a5\u8d77\u6765\u3002\u5982\u679c\u7269\u4f53 2 \u7684\u8d28\u91cf\u4e3a 7 kg\uff0c\u659c\u5761\u7684\u659c\u7387\u4e3a 50\u00b0\uff0c\u5219\u8ba1\u7b97\u7269\u4f53 1 \u7684\u8d28\u91cf\uff0c\u4f7f\u6574\u4e2a\u7cfb\u7edf\u5904\u4e8e\u5e73\u8861\u72b6\u6001\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u6469\u64e6\u529b\u53ef\u4ee5\u5ffd\u7565\u4e0d\u8ba1\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-dequilibre-des-forces.png\" alt=\"\u5e73\u79fb\u5e73\u8861\u95ee\u9898\" class=\"wp-image-295\" width=\"299\" height=\"240\" srcset=\"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\" 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\">\u7269\u4f53 1 \u4f4d\u4e8e\u503e\u659c\u7684\u659c\u5761\u4e0a\uff0c\u56e0\u6b64\u9996\u5148\u8981\u505a\u7684\u662f\u5c06\u5176\u91cd\u91cf\u7684\u529b\u77e2\u91cf\u5316\uff0c\u4f7f\u529b\u4f5c\u7528\u5728\u659c\u5761\u7684\u8f74\u4e0a\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-35d7a76d4aead5e24628c76e5f80b4eb_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"P_{1x}=P_1\\cdot \\text{sen}(\\alpha)\" title=\"Rendered by QuickLaTeX.com\" height=\"19\" width=\"131\" 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-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\u529b\u96c6\u4e3a\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=\"\u89e3\u51b3\u4e86\u5e73\u79fb\u5e73\u8861\u7ec3\u4e60\" 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\u5236\u5b9a\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-9b5e757fb28e9dde3aed458f89a3ed53_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"P_1\\cdot \\text{sen}(\\alpha)=P_2\" title=\"Rendered by QuickLaTeX.com\" height=\"19\" width=\"123\" 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-37d57b7e3c4a13f3c4dc4ae981f7d61f_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"m_1=9,14\\kg\" title=\"Rendered by QuickLaTeX.com\" height=\"16\" width=\"82\" style=\"vertical-align: -4px;\"><\/p>\n<\/p>\n<div class=\"wp-block-otfm-box-spoiler-end otfm-sp_end\"><\/div>\n<h3 class=\"wp-block-heading\">\u7ec3\u4e604<\/h3>\n<p>\u5982\u4e0b\u56fe\u6240\u793a\uff0c\u4e00\u6839 10 m \u7684\u5355\u6760\u652f\u6491\u7740\u4e00\u4e2a\u8d28\u91cf\u4e3a 8 kg \u7684\u7269\u4f53\u3002\u77e5\u9053\u652f\u67b6\u548c\u60ac\u6d6e\u4f53\u4e4b\u95f4\u7684\u8ddd\u79bb\uff0c\u5982\u679c\u7cfb\u7edf\u5904\u4e8e\u65cb\u8f6c\u548c\u5e73\u79fb\u5e73\u8861\uff0c\u652f\u67b6\u65bd\u52a0\u7684\u529b\u662f\u591a\u5c11\uff1f <\/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-dequilibre-de-rotation.png\" alt=\"\u65cb\u8f6c\u5e73\u8861\u95ee\u9898\" class=\"wp-image-355\" width=\"339\" height=\"120\" srcset=\"https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/probleme-dequilibre-de-rotation-300x107.png 300w, https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/probleme-dequilibre-de-rotation.png 643w\" 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\">\u9996\u5148\uff0c\u6211\u4eec\u4f7f\u7528\u91cd\u529b\u516c\u5f0f\u6765\u8ba1\u7b97\u5355\u6760\u5fc5\u987b\u652f\u6491\u7684\u91cd\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-eb480f5d32a9e25cefacd5f89d407580_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"P=m\\cdot g=8\\cdot 9,81 =78,48 \\ N\" title=\"Rendered by QuickLaTeX.com\" height=\"17\" width=\"244\" style=\"vertical-align: -4px;\"><\/p>\n<\/p>\n<p class=\"has-text-align-left\"> \u56e0\u6b64\uff0c\u7cfb\u7edf\u7684\u81ea\u7531\u4f53\u56fe\u4e3a\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-rotation-equilibre.png\" alt=\"\u89e3\u51b3\u65cb\u8f6c\u5e73\u8861\u7ec3\u4e60\" class=\"wp-image-356\" width=\"340\" height=\"297\" srcset=\"https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/exercice-resolu-rotation-equilibre-300x261.png 300w, https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/exercice-resolu-rotation-equilibre.png 654w\" 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\u7cfb\u7edf\u5904\u4e8e\u529b\u5e73\u8861\u72b6\u6001\uff0c\u56e0\u6b64\u6240\u6709\u8fd9\u4e9b\u529b\u7684\u603b\u548c\u5fc5\u987b\u4e3a\u96f6\u3002\u5229\u7528\u8fd9\u4e2a\u5e73\u8861\u6761\u4ef6\uff0c\u6211\u4eec\u53ef\u4ee5\u5236\u5b9a\u4ee5\u4e0b\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-635096a57ce10781254f283c9807f64c_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"F_A+F_B-P=0\" title=\"Rendered by QuickLaTeX.com\" height=\"15\" width=\"136\" style=\"vertical-align: -3px;\"><\/p>\n<\/p>\n<p class=\"has-text-align-left\"> \u53e6\u4e00\u65b9\u9762\uff0c\u8be5\u9648\u8ff0\u4e5f\u544a\u8bc9\u6211\u4eec\u7cfb\u7edf\u5904\u4e8e\u52a8\u91cf\u5e73\u8861\u72b6\u6001\u3002\u56e0\u6b64\uff0c\u5982\u679c\u6211\u4eec\u8003\u8651\u7cfb\u7edf\u4e2d\u4efb\u610f\u70b9\u7684\u529b\u77e9\u603b\u548c\uff0c\u7ed3\u679c\u5fc5\u5b9a\u4e3a\u96f6\uff0c\u5982\u679c\u6211\u4eec\u91c7\u7528\u4e24\u4e2a\u652f\u6491\u4e4b\u4e00\u7684\u53c2\u8003\u70b9\uff0c\u6211\u4eec\u5c06\u5f97\u5230\u4e00\u4e2a\u5177\u6709\u5355\u4e2a\u672a\u77e5\u6570\u7684\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-f1a6d56c3426e8d6c2e890b5e8f4a873_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"M(A)=0\" title=\"Rendered by QuickLaTeX.com\" height=\"19\" width=\"79\" 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-922d5ff929e034db7a9e80d732b0b893_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"-P\\cdot 6.5+F_B\\cdot (6.5+3.5)=0\" title=\"Rendered by QuickLaTeX.com\" height=\"19\" width=\"233\" style=\"vertical-align: -5px;\"><\/p>\n<\/p>\n<p class=\"has-text-align-left\">\u73b0\u5728\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u6c42\u89e3\u65b9\u7a0b\u4e2d\u7684\u672a\u77e5\u6570\u6765\u8ba1\u7b97\u652f\u6491 B \u65bd\u52a0\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-95596edf27bb6086c35473f55465416d_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"-78.48\\cdot 6.5+F_B\\cdot 10=0\" title=\"Rendered by QuickLaTeX.com\" height=\"16\" width=\"197\" 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-953185a6ad4824b654b8a40e259bbd71_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"F_B=\\cfrac{78.48\\cdot 6.5}{10}\" title=\"Rendered by QuickLaTeX.com\" height=\"39\" width=\"125\" style=\"vertical-align: -12px;\"><\/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-c5459080e5aa468fa3d77a16a2b0d9b9_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"F_B=51.01\\N\" title=\"Rendered by QuickLaTeX.com\" height=\"16\" width=\"87\" style=\"vertical-align: -3px;\"><\/p>\n<\/p>\n<p class=\"has-text-align-left\">\u6700\u540e\uff0c\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u5c06\u83b7\u5f97\u7684\u503c\u4ee3\u5165\u5782\u76f4\u529b\u7684\u65b9\u7a0b\u6765\u77e5\u9053\u65bd\u52a0\u5728\u53e6\u4e00\u4e2a\u652f\u6491\u4e0a\u7684\u529b\u7684\u5f3a\u5ea6\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-635096a57ce10781254f283c9807f64c_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"F_A+F_B-P=0\" title=\"Rendered by QuickLaTeX.com\" height=\"15\" width=\"136\" 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-36325128977806ddaca1436ffb68dcd4_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"F_A+51,01-78,48=0\" title=\"Rendered by QuickLaTeX.com\" height=\"17\" width=\"185\" style=\"vertical-align: -4px;\"><\/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-5ecd2d608e61435093289d17c242e21f_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"F_A=27,47\\N\" title=\"Rendered by QuickLaTeX.com\" height=\"17\" width=\"90\" 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\u4ec0\u4e48\u662f\u5e73\u8861\u6761\u4ef6\u3002\u60a8\u5c06\u627e\u5230\u4e24\u79cd\u5e73\u8861\u6761\u4ef6\u7684\u771f\u5b9e\u793a\u4f8b\uff0c\u6b64\u5916\uff0c\u60a8\u5c06\u80fd\u591f\u901a\u8fc7\u9010\u6b65\u89e3\u51b3\u7684\u7ec3\u4e60\u8fdb\u884c\u8bad\u7ec3\u3002 \u5e73\u8861\u6761\u4ef6\u662f &hellip;<\/p>\n<p class=\"read-more\"> <a class=\"\" href=\"https:\/\/physigeek.com\/cn\/%e5%b9%b3%e8%a1%a1%e6%9d%a1%e4%bb%b6\/\"> <span class=\"screen-reader-text\">\u5e73\u8861\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-23","post","type-post","status-publish","format-standard","hentry","category-5"],"yoast_head":"<!-- This site is optimized 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