A ball is shot straight up near the Earth's surface. (a) Can its velocity be zero while

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A ball is shot straight up near the Earth's surface.

(a) Can its velocity be zero while its acceleration is nonzero? 

\((b)\) Is the velocity of the ball the same at any two points, one of which is on the upward trajectory, and one of which is on the downward one?

(c) Is the speed of the ball the same at any two points, one of which is on the upward trajectory, and one of which is on the downward one? \(\cdot\)

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