状态: 当前离线
青蛙踢球 兔子踢青蛙
Ek=∫Fdr=∫(dp/dt)*dr=∫dp*dr/dt=∫vdp=pv-∫pdv
=Mv^2-∫mv/sqr(1-v^2/c^2)dv=Mv^2+mc^2*sqr(1-v^2/c^2)-mc^2
=Mv^2+Mc^2(1-v^2/c^2)-mc^2
=Mc^2-mc^2
即E=Mc^2=Ek+mc^2
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我终于活着回来了5555555555555555555555还记得我吗??好几百个电话啊!!!!!!!!
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