thanks. I just recall how the high school physics teaches.
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送交者: Amsel 于 2013-12-06, 12:15:32:
回答: you haven't got it 由 008 于 2013-12-06, 11:59:19:
They start from vectors, then work, then kinetic and potential energies, then momentum. Force is taught as the most basic concept, making it very difficult for a student in his future to realize that force is not fundamental.
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