zhaotingjixie 發(fā)表于 2013-6-26 17:44
從微分的角度看,選圓上一質(zhì)點(diǎn),,質(zhì)量是m,,T=F*r=ma1*r(這里的a1是線加速度)=m(a*r)*r=ja
zhaotingjixie 發(fā)表于 2013-6-26 17:44
從微分的角度看,,選圓上一質(zhì)點(diǎn),,質(zhì)量是m,T=F*r=ma1*r(這里的a1是線加速度)=m(a*r)*r=ja
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