万有引力真相调查报告第83期。为什么惯性质量和引力质量相等？
Synopsis
所谓的惯性力也就是F=ma中的力，和所谓的引力也就是F=mg中的力在本质上都是一样的。都是在改变物体运动状态的过程中出现的 ...
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