{"id":19072,"date":"2011-01-05T16:02:03","date_gmt":"2011-01-05T08:02:03","guid":{"rendered":"http:\/\/highscope.ch.ntu.edu.tw\/wordpress\/?p=19072"},"modified":"2021-10-06T16:29:37","modified_gmt":"2021-10-06T08:29:37","slug":"%e5%8b%95%e9%87%8f%ef%bc%88momentum%ef%bc%89","status":"publish","type":"post","link":"http:\/\/localhost\/%e5%8b%95%e9%87%8f%ef%bc%88momentum%ef%bc%89\/","title":{"rendered":"\u52d5\u91cf"},"content":{"rendered":"

\u52d5\u91cf (Momentum)
\n<\/span>\u57fa\u9686\u5e02\u7acb\u6696\u6696\u9ad8\u7d1a\u4e2d\u5b78\u7269\u7406\u79d1\u5f35\u5fd7\u5eb7\u8001\u5e2b\/\u570b\u7acb\u5f70\u5316\u5e2b\u7bc4\u5927\u5b78\u6d2a\u9023\u8f1d\u6559\u6388\u8cac\u4efb\u7de8\u8f2f<\/span><\/strong><\/p>\n

\u52d5\u91cf\u662f\u4e00\u500b\u63cf\u8ff0\u7269\u9ad4\u300c\u904b\u52d5\u72c0\u614b\u8207\u6163\u6027\u5927\u5c0f\u300d\u7684\u53e4\u5178\u7269\u7406\u91cf\uff0c\u6211\u5011\u53ef\u4ee5\u7528\u300e\u901f\u5ea6 $$(V)$$\u300f\u8207\u300e\u8cea\u91cf $$(m)$$\u300f\u7684\u4e58\u7a4d\u4f86\u8868\u793a\uff0c\u4ea6\u5373 $$p=mv$$\u3002<\/p>\n

\u5176\u4e2d\uff0c\u7269\u9ad4\u7684\u300c\u904b\u52d5\u72c0\u614b\u8207\u6163\u6027\u5927\u5c0f\u300d\uff0c\u5206\u5225\u548c\u300c\u901f\u5ea6\u8207\u8cea\u91cf\u300d\u76f8\u547c\u61c9\uff1b\u7576\u6211\u5011\u8981\u5b8c\u6574\u63cf\u8ff0\u7269\u9ad4\u7684\u904b\u52d5\u72c0\u614b\u8207\u6163\u6027\u5927\u5c0f\u6642\uff0c\u5c31\u61c9\u8a72\u4ee5\u300c\u901f\u5ea6\u8207\u8cea\u91cf\u7684\u4e58\u7a4d\u300d\u505a\u8868\u793a\u3002\u7531\u65bc\u901f\u5ea6 $$(V)$$ \u662f\u4e00\u500b\u5411\u91cf\uff0c\u56e0\u6b64\u52d5\u91cf $$(P)$$ \u4e5f\u662f\u4e00\u500b\u5411\u91cf\uff0c\u5b83\u7684SI\u6a19\u6e96\u55ae\u4f4d\u70ba $$kg-m\/s$$ \u6216\u662f $$N-s$$\u3002\u6709\u95dc\u52d5\u91cf\u7684\u6982\u5ff5\uff0c\u53ef\u4ee5\u4e0b\u5716\u8868\u793a\uff1a<\/p>\n

\"\"<\/a><\/p>\n

\u5f9e\u4e0a\u5716\u53ef\u77e5\uff0c\u5927\u4eba(\u8cea\u91cf $$M$$)\u8207\u5c0f\u5b69(\u8cea\u91cf $$m$$)\u7684\u521d\u59cb\u904b\u52d5\u72c0\u614b\u70ba\u975c\u6b62\uff0c\u52d5\u91cf\u5747\u70ba $$0(kg-m\/s)$$\uff1b\u5728\u88ab\u76f8\u540c\u7684\u8eca\u3001\u76f8\u540c\u7684\u529b\u9053\u649e\u5230\u5f8c\uff0c\u5169\u8005\u96d6\u7136\u90fd\u88ab\u649e\u98db\uff0c\u4f46\u4ed6\u5011\u98db\u51fa\u53bb\u7684\u901f\u5ea6\u90fd\u4e0d\u4e00\u6a23\u3002<\/p>\n

\u4e8b\u5be6\u4e0a\uff0c\u5927\u4eba\u98db\u51fa\u53bb\u7684\u901f\u5ea6 $$(V_M)$$ \u61c9\u6bd4\u5c0f\u5b69\u98db\u51fa\u53bb\u7684\u901f\u5ea6 $$(V_m)$$ \u4f86\u5f97\u5c0f\u4e9b\uff0c\u5176\u89e3\u91cb\u7684\u89c0\u9ede\u6709\u4e8c\uff1a(1) \u4ee5\u725b\u9813\u7b2c\u4e00\u904b\u52d5\u5b9a\u5f8b\u4f86\u770b\uff1a\u5927\u4eba\u7684\u6163\u6027\u8cea\u91cf\u6bd4\u5c0f\u5b69\u5927\uff0c\u8f03\u5bb9\u6613\u4fdd\u6301\u539f\u5148\u975c\u6b62\u7684\u72c0\u614b\uff0c\u6240\u4ee5\u901f\u5ea6\u5c0f\u3002(2) \u4ee5\u725b\u9813\u7b2c\u4e8c\u904b\u52d5\u5b9a\u5f8b\u4f86\u770b\uff1a\u5169\u4eba\u53d7\u5230\u7684\u529b\u9053\u76f8\u540c\uff0c\u6240\u4ee5\u52d5\u91cf\u8b8a\u5316\u91cf\u76f8\u540c\uff1b\u5728 $$P$$ \u76f8\u540c\u7684\u60c5\u6cc1\u4e0b\uff0c\u8cea\u91cf\u8d8a\u5927\u7684\uff0c\u901f\u5ea6\u8d8a\u5c0f\uff1b\u800c\u8cea\u91cf\u8d8a\u5c0f\u7684\uff0c\u901f\u5ea6\u8d8a\u5927\u3002<\/p>\n

\u56e0\u6b64\uff0c\u52d5\u91cf\u7684\u5927\u5c0f\u8207\u300c\u8cea\u91cf\u3001\u901f\u5ea6\u300d\u5747\u6709\u95dc\uff0c\u6b32\u63cf\u8ff0\u7269\u9ad4\u904b\u52d5\u72c0\u614b\u8207\u6163\u6027\u5927\u5c0f\u6642\uff0c\u61c9\u540c\u6642\u8003\u616e\u8cea\u91cf\u8207\u901f\u5ea6\u7684\u4e58\u7a4d\uff0c\u624d\u80fd\u6c7a\u5b9a\u8a72\u7269\u9ad4\u7684\u52d5\u91cf\u662f\u5927\u9084\u662f\u5c0f\u3002\u8209\u4f8b\u4f86\u8aaa\uff1a\u8cea\u91cf\u70ba $$145$$ \u516c\u514b\u7684\u68d2\u7403\u4ee5\u6642\u901f $$144$$ \u516c\u91cc\u98db\u884c\u6642\uff0c\u5176\u52d5\u91cf\u5927\u5c0f\u61c9\u70ba $$0.145\\times 144000\\div 3600=5.8(kg-m\/s)$$\uff0c\u65b9\u5411\u61c9\u8207\u98db\u884c\u65b9\u5411\u76f8\u540c\u3002\u53c8\u82e5\u8cea\u91cf\u70ba $$0.6$$ \u516c\u65a4\u7684\u7c43\u7403\u4ee5\u6bcf\u79d2 $$2$$ \u516c\u5c3a\u98db\u884c\u6642\uff0c\u5176\u52d5\u91cf\u5927\u5c0f\u70ba $$1.2(kg-m\/s)$$\u3002<\/p>\n

\u4e8b\u5be6\u4e0a\uff0c\u52d5\u91cf\u5728\u7269\u7406\u5b78\u4e2d\u4e0d\u50c5\u662f\u4e00\u500b\u975e\u5e38\u91cd\u8981\u7684\u7269\u7406\u91cf\uff0c\u5b83\u5728\u91cf\u5b50\u529b\u5b78\u53ca\u76f8\u5c0d\u8ad6\u4e2d\u4e5f\u4f54\u6709\u91cd\u8981\u7684\u5730\u4f4d\u3002\u503c\u5f97\u6ce8\u610f\u7684\u662f\uff0c\u300c\u52d5\u91cf $$(P)$$ \u548c\u52d5\u80fd $$(E_k)$$\u300d\u662f\u4e0d\u540c\u7684\u7269\u7406\u91cf\u3002\u300c\u52d5\u80fd\u300d\u6240\u63cf\u8ff0\u7684\u662f\u300c\u7269\u9ad4\u904b\u52d5\u6642\u6240\u5177\u6709\u7684\u80fd\u91cf $$(E_k=\\frac{1}{2}mV^2)$$\u300d\uff0c\u800c\u300c\u52d5\u91cf\u300d\u6240\u63cf\u8ff0\u7684\u662f\u300c\u7269\u9ad4\u7684\u904b\u52d5\u72c0\u614b\u8207\u6163\u6027\u5927\u5c0f($$P=mV$$ \u52d5\u91cf\uff08Momentum\uff09)\u300d\u3002\u5176\u4e2d\uff0c\u52d5\u91cf\u91cf\u503c\u5927\u7684\u7269\u9ad4\u52d5\u80fd\u4e0d\u4e00\u5b9a\u8f03\u5927\uff1b\u53cd\u4e4b\uff0c\u52d5\u80fd\u5927\u7684\u7269\u9ad4\u52d5\u91cf\u91cf\u503c\u4e5f\u4e0d\u4e00\u5b9a\u8f03\u5927\uff0c\u5169\u8005\u7684\u95dc\u4fc2\u53ef\u5f9e $$E_k=P^2\/2m$$ \u4e2d\u81ea\u884c\u63a8\u8ad6\u6bd4\u8f03\u3002<\/p>\n

\n

\u53c3\u8003\u8cc7\u6599<\/strong><\/p>\n

\u7dad\u57fa\u767e\u79d1\u82f1\u6587\u7248\u3001\u7dad\u57fa\u767e\u79d1\u4e2d\u6587\u7248\u3001\u9ad8\u4e2d\u7269\u8cea\u79d1\u5b78\u7269\u7406(\u4e0a)-\u5357\u4e00\u66f8\u5c40<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"

\u52d5\u91cf (Momentum) \u57fa\u9686\u5e02\u7acb\u6696\u6696\u9ad8\u7d1a\u4e2d\u5b78\u7269\u7406\u79d1\u5f35\u5fd7\u5eb7\u8001\u5e2b\/\u570b\u7acb\u5f70\u5316\u5e2b\u7bc4\u5927\u5b78\u6d2a\u9023\u8f1d\u6559\u6388\u8cac\u4efb\u7de8\u8f2f \u52d5\u91cf\u662f\u4e00…<\/p>\n","protected":false},"author":50,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7,107,3],"tags":[2257,2024],"class_list":["post-19072","post","type-post","status-publish","format-standard","hentry","category-physics01-04","category-physics00","category-physics01","tag-2257","tag-2024","loop-entry","cat-7","cat-107","cat-3","no-thumbnail"],"views":9198,"_links":{"self":[{"href":"http:\/\/localhost\/wp-json\/wp\/v2\/posts\/19072","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/localhost\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/localhost\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/localhost\/wp-json\/wp\/v2\/users\/50"}],"replies":[{"embeddable":true,"href":"http:\/\/localhost\/wp-json\/wp\/v2\/comments?post=19072"}],"version-history":[{"count":1,"href":"http:\/\/localhost\/wp-json\/wp\/v2\/posts\/19072\/revisions"}],"predecessor-version":[{"id":89021,"href":"http:\/\/localhost\/wp-json\/wp\/v2\/posts\/19072\/revisions\/89021"}],"wp:attachment":[{"href":"http:\/\/localhost\/wp-json\/wp\/v2\/media?parent=19072"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/localhost\/wp-json\/wp\/v2\/categories?post=19072"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/localhost\/wp-json\/wp\/v2\/tags?post=19072"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}