{"id":2740,"date":"2012-03-08T15:52:01","date_gmt":"2012-03-08T07:52:01","guid":{"rendered":"http:\/\/www.qiusir.com\/?p=2740"},"modified":"2012-03-08T15:52:01","modified_gmt":"2012-03-08T07:52:01","slug":"%e5%8a%9b%e7%9a%84%e4%bd%9c%e7%94%a8%e7%82%b9%e7%9a%84%e4%bd%8d%e7%a7%bb","status":"publish","type":"post","link":"https:\/\/www.qiusir.com\/?p=2740","title":{"rendered":"\u529b\u7684\u4f5c\u7528\u70b9\u7684\u4f4d\u79fb"},"content":{"rendered":"<blockquote><p>\u901a\u8fc7\u52a8\u6ed1\u8f6e\u62c9\u52a8\u7269\u5757\uff0c\u529bF\u59cb\u7ec8\u4e0e\u6c34\u5e73\u6210\u89d2theta\uff0c\u5219\u6b64\u8fc7\u7a0b\u4e2d\u529bF\u505a\u529f\u591a\u5c11\uff1f<\/p><\/blockquote>\n<p>\u5e38\u89c1\u9519\u8bef1\u3001$$W=FS$$\uff1b\u5e38\u89c1\u9519\u8bef2\u3001$$W=FScos\\theta$$\uff1b\u5e38\u89c1\u7b54\u68483\u3001$$W=FS+FScos\\theta$$<br \/>\n\u901a\u8fc7\u529f\u5b9a\u4e49\u76f4\u63a5\u6c42\u89e3\u7684\u7b54\u68484\u3001$$W=F2Scos\\frac{1}{2}\\theta\\times cos\\frac{1}{2}\\theta$$\uff08\u529b\u7684\u4f5c\u7528\u70b9\u5728\u7ef3\u7aef\uff09\u867d\u7ed3\u679c\u901a3\uff0c\u4f463\u6b63\u786e\u7684\u7ed3\u679c\u91cc\u5374\u6709\u5173\u952e\u7684\u76f2\u70b9\u3002<br \/>\n\u5f53\u7136\u4e5f\u53ef\u7b49\u6548\u6210\u6c34\u5e73\u529b\u548c\u6210theta\u89d2\u7684\u4e24\u4e2aF\u5171\u540c\u4f5c\u7528\uff0c\u6b64\u65f6\u529b\u7684\u4f5c\u7528\u70b9\u5728\u7269\u4f53\u4e0a\uff0c\u4f4d\u79fb\u662f\u6c34\u5e73S\uff0c\u5408\u529b\u662f\u5982\u679c\u662f$$F_{net}=2Fcos\\frac{1}{2}\\theta\\times cos\\frac{1}{2}\\theta$$\u3002<br \/>\nngg_shortcode_0_placeholder<br \/>\n\u66f4\u7b80\u4fbf\u7684\u529e\u6cd5\u662f\u628a\u7ef3\u7aef\u4f4d\u79fb\u770b\u6210\u4e24\u4e2a\u5411\u91cf\u5408\u6210&#8230;<br \/>\n$$W=\\vec F\\cdot\\vec S=\\vec F\\cdot(\\vec S_{1}+\\vec S_{2})=\\vec F\\cdot\\vec S_{1}+\\vec F\\cdot\\vec S_{2}$$<br \/>\n$$W=FS+FScos\\theta$$<br \/>\n\u9519\u8bef\u7684\u7ed3\u679c\u4e0d\u4e4f\u6b63\u786e\u7684\u6210\u5206\uff0c\u800c\u6b63\u786e\u7684\u7ed3\u679c\u5f80\u5f80\u6709\u5ffd\u89c6\u7ec6\u8282\u7684\u8fd0\u6c14\u3002\u5982\u6b64\u5bf9\u8bfe\u5802\u4e0a\u6b63\u8bef\u8bc4\u5224\u8fb9\u754c\u9700\u6a21\u7cca\uff0c\u800c\u81ea\u6211\u4fee\u6b63\u4e5f\u662f\u63a2\u7a76\u7684\u610f\u4e49\u3002<\/p>\n<p>$$W = \\int \\frac{d\\vec{p}}{dt} \\cdot d\\vec{s} = \\int m \\frac{d\\vec{v}}{dt} \\cdot d\\vec{s} = \\int m \\vec{v} \\cdot d\\vec{v} =\\frac{1}{2} \\int m d (\\vec{v} \\cdot \\vec{v}) = \\frac{1}{2}mv^2 + C_0$$<br \/>\n$$E_r = \\frac{1}{2} \\int v^2 dm = \\frac{1}{2} \\int r^2 \\omega^2 dm = \\frac{1}{2} \\omega^2 \\int r^2 dm = \\frac{1}{2} I \\omega^2$$<br \/>\nP.S.<a href=\"http:\/\/www.cfsm.cn\/info\/symbols\/symbols.htm\" target=\"_blank\">\u5e38\u7528\u6570\u5b66\u7b26\u53f7\u7684 LaTeX \u8868\u793a\u65b9\u6cd5<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u901a\u8fc7\u52a8\u6ed1\u8f6e\u62c9\u52a8\u7269\u5757\uff0c\u529bF\u59cb\u7ec8\u4e0e\u6c34\u5e73\u6210\u89d2theta\uff0c\u5219\u6b64\u8fc7\u7a0b\u4e2d\u529bF\u505a\u529f\u591a\u5c11\uff1f \u5e38\u89c1\u9519\u8bef1\u3001$$W=FS$$\uff1b\u5e38\u89c1 &#8230; <a title=\"\u529b\u7684\u4f5c\u7528\u70b9\u7684\u4f4d\u79fb\" class=\"read-more\" href=\"https:\/\/www.qiusir.com\/?p=2740\" aria-label=\"\u9605\u8bfb \u529b\u7684\u4f5c\u7528\u70b9\u7684\u4f4d\u79fb\">\u9605\u8bfb\u66f4\u591a<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"ngg_post_thumbnail":0,"footnotes":""},"categories":[5],"tags":[259,14],"class_list":["post-2740","post","type-post","status-publish","format-standard","hentry","category-physics","tag-class","tag-neyc"],"_links":{"self":[{"href":"https:\/\/www.qiusir.com\/index.php?rest_route=\/wp\/v2\/posts\/2740","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.qiusir.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.qiusir.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.qiusir.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.qiusir.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2740"}],"version-history":[{"count":0,"href":"https:\/\/www.qiusir.com\/index.php?rest_route=\/wp\/v2\/posts\/2740\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.qiusir.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2740"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.qiusir.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2740"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.qiusir.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2740"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}