来自孙鲁毅的问题
物理的几个英文定律和题目求翻译定律1.thedirectionofvelocityincurvilinearmotionischangingwithtimeandthedirectionofthevelocityofaparticleatacertainpoint(orinstsnt)isinthetangentdirectionofthecurveatthat
物理的几个英文定律和题目求翻译
定律1.thedirectionofvelocityincurvilinearmotionischangingwithtimeandthedirectionofthevelocityofaparticleatacertainpoint(orinstsnt)isinthetangentdirectionofthecurveatthatpoint.
2.whenthedirectionofthenetforceabodyexperiencesandthedirectionofthevelocityofthebodydonotfallinthesamestraightline,thebodyisincurvilinearmotion.
题目1.ifaboat'sspeedinthestillwateris5m/s,andthespeedofthewaterinariveris3m/s.howcanwecrosstheriverintheshortesttime?andhowabouttheshortestdistance?
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2020-02-02 20:19