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Asked by  | 13th Sep, 2008, 09:19: AM

Expert Answer:

Suppose a ball is thrown up in the air. At the highest point it comes to rest and then falls back. At the highest point its velocity is zero, but the gravitational force is still acting on it so the force on it at that instant is not zero.

Answered by  | 13th Sep, 2008, 10:34: AM

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