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提问人:网友edison69056
发布时间:2022-01-07
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A small sphere [图] with mass m moves from the sam...
A small spherewith mass m moves from the same height to the ground along three different paths. It is assumed that the initial velocity is zero and all frictions can be neglected. If the velocities of the sphere when it reaches the ground are,and,respectively, then
A、
B、
C、
D、
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