功的定义是力和力方�位移乘积,计算时却又可以分解力然后乘位移,为什么不定义为位移与位移方�力的乘积? 知乎 Template




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tomski功的定义是力和力方�位移乘积,计算时却又可以分解力然后乘位移,为什么不定义为位移与位移方�力的乘积? 知乎 coloring