So the work that Walter Lewin has to do to bring it from A to B is the integral in going from A to B of my force, dx.
所要做的功,就等于A到B的,我的力的积分,这是个点积。
Or, if you prefer, that's negative integral from a to b of M of dx.
或者你喜欢的话，那就是积分的负值,在a到b上对MdX的积分。
Or, if you prefer, that's negative integral from a to b of M of dx.
或者你喜欢的话，那就是积分的负值,在a到b上对MdX的积分。
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