比如是作用于m1上的力,就是m1g和f1. m1g就是重力,f1是向上的拉力,也就是m2g。f1=m2g.
f2针对的是m2. f2=m1g。f1/=f2,所以有重量加速度
比如是作用于m1上的力,就是m1g和f1. m1g就是重力,f1是向上的拉力,也就是m2g。f1=m2g.
f2针对的是m2. f2=m1g。f1/=f2,所以有重量加速度
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