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2.\u80e1\u514b\u5b9a\u5f8bF\uff1dkx \uff5b\u65b9\u5411\u6cbf\u6062\u590d\u5f62\u53d8\u65b9\u5411\uff0ck\uff1a\u52b2\u5ea6\u7cfb\u6570(N\/m)\uff0cx\uff1a\u5f62\u53d8\u91cf(m)\uff5d<\/p>\n
3.\u6ed1\u52a8\u6469\u64e6\u529bF\uff1d\u03bcFN \uff5b\u4e0e\u7269\u4f53\u76f8\u5bf9\u8fd0\u52a8\u65b9\u5411\u76f8\u53cd\uff0c\u03bc\uff1a\u6469\u64e6\u56e0\u6570\uff0cFN\uff1a\u6b63\u538b\u529b(N)\uff5d<\/p>\n
4.\u9759\u6469\u64e6\u529b0\u2264f\u9759\u2264fm \uff08\u4e0e\u7269\u4f53\u76f8\u5bf9\u8fd0\u52a8\u8d8b\u52bf\u65b9\u5411\u76f8\u53cd\uff0cfm\u4e3a\u6700\u5927\u9759\u6469\u64e6\u529b\u3002<\/p>\n
5.\u4e07\u6709\u5f15\u529bF\uff1dGm1m2\/r^2 \uff08G\uff1d6.67\u00d710-11N\u2022m2\/kg2,\u65b9\u5411\u5728\u5b83\u4eec\u7684\u8fde\u7ebf\u4e0a\uff09\u3002<\/p>\n
6.\u9759\u7535\u529bF\uff1dkQ1Q^2\/r2 \uff08k\uff1d9.0\u00d7109N\u2022m2\/C2,\u65b9\u5411\u5728\u5b83\u4eec\u7684\u8fde\u7ebf\u4e0a\uff09\u3002<\/p>\n
7.\u7535\u573a\u529bF\uff1dEq \uff08E\uff1a\u573a\u5f3aN\/C\uff0cq\uff1a\u7535\u91cfC\uff0c\u6b63\u7535\u8377\u53d7\u7684\u7535\u573a\u529b\u4e0e\u573a\u5f3a\u65b9\u5411\u76f8\u540c\uff09\u3002<\/p>\n
8.\u5b89\u57f9\u529bF\uff1dBILsin\u03b8 \uff08\u03b8\u4e3aB\u4e0eL\u7684\u5939\u89d2\uff0c\u5f53L\u22a5B\u65f6:F\uff1dBIL\uff0cB\/\/L\u65f6:F\uff1d0\uff09\u3002<\/p>\n
9.\u6d1b\u4ed1\u5179\u529bf\uff1dqVBsin\u03b8 \uff08\u03b8\u4e3aB\u4e0eV\u7684\u5939\u89d2\uff0c\u5f53V\u22a5B\u65f6\uff1af\uff1dqVB\uff0cV\/\/B\u65f6:f\uff1d0\uff09\u3002<\/p>\n
\u6ce8:<\/p>\n
(1)\u52b2\u5ea6\u7cfb\u6570k\u7531\u5f39\u7c27\u81ea\u8eab\u51b3\u5b9a;<\/p>\n
(2)\u6469\u64e6\u56e0\u6570\u03bc\u4e0e\u538b\u529b\u5927\u5c0f\u53ca\u63a5\u89e6\u9762\u79ef\u5927\u5c0f\u65e0\u5173\uff0c\u7531\u63a5\u89e6\u9762\u6750\u6599\u7279\u6027\u4e0e\u8868\u9762\u72b6\u51b5\u7b49\u51b3\u5b9a;<\/p>\n
(3)fm\u7565\u5927\u4e8e\u03bcFN\uff0c\u4e00\u822c\u89c6\u4e3afm\u2248\u03bcFN;<\/p>\n
(4)\u5176\u5b83\u76f8\u5173\u5185\u5bb9\uff1a\u9759\u6469\u64e6\u529b\uff08\u5927\u5c0f\u3001\u65b9\u5411\uff09<\/p>\n
(5)\u7269\u7406\u91cf\u7b26\u53f7\u53ca\u5355\u4f4dB\uff1a\u78c1\u611f\u5f3a\u5ea6(T)\uff0cL\uff1a\u6709\u6548\u957f\u5ea6(m)\uff0cI:\u7535\u6d41\u5f3a\u5ea6(A)\uff0cV\uff1a\u5e26\u7535\u7c92\u5b50\u901f\u5ea6(m\/s),q:\u5e26\u7535\u7c92\u5b50\uff08\u5e26\u7535\u4f53\uff09\u7535\u91cf(C);<\/p>\n
(6)\u5b89\u57f9\u529b\u4e0e\u6d1b\u4ed1\u5179\u529b\u65b9\u5411\u5747\u7528\u5de6\u624b\u5b9a\u5219\u5224\u5b9a\u3002<\/p>\n
2\uff09\u529b\u7684\u5408\u6210\u4e0e\u5206\u89e3<\/p>\n
1.\u540c\u4e00\u76f4\u7ebf\u4e0a\u529b\u7684\u5408\u6210\u540c\u5411:F\uff1dF1+F2\uff0c \u53cd\u5411\uff1aF\uff1dF1-F2 (F1>F2)<\/p>\n
2.\u4e92\u6210\u89d2\u5ea6\u529b\u7684\u5408\u6210\uff1aF\uff1d(F1^2+F2^2+2F1F2cos\u03b1)^1\/2\uff08\u4f59\u5f26\u5b9a\u7406\uff09 F1\u22a5F2\u65f6:F\uff1d(F1^2+F2^2)^1\/2<\/p>\n
3.\u5408\u529b\u5927\u5c0f\u8303\u56f4\uff1a|F1-F2|\u2264F\u2264|F1+F2|<\/p>\n
4.\u529b\u7684\u6b63\u4ea4\u5206\u89e3\uff1aFx\uff1dFcos\u03b2\uff0cFy\uff1dFsin\u03b2\uff08\u03b2\u4e3a\u5408\u529b\u4e0ex\u8f74\u4e4b\u95f4\u7684\u5939\u89d2tg\u03b2\uff1dFy\/Fx\uff09
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