Chapter 1 of Goldstein <Classical Mechanics>


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送交者: gyro 于 2009-10-27, 20:48:10:

回答: 只是想看看杠杆定律的证明方法而已。你怎么见到什么都冒火? 由 Palmetto 于 2009-10-27, 19:59:23:

The equation of motion for a system of particles.

Key step: The mutual force between any two particles are equal in magnitude and oppoite in direction, and lie on the line connecting the two particles.




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