As a protest against the umpire's calls,a baseball pitcher throws a ball straight up into the air

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Question:

As a protest against the umpire's calls,a baseball pitcher throws a ball straight up into the air at a speed of 20.0 m/s. In the process, he moves his hand through a distance of 1.50 m. If the ball has a mass of 0.150 kg, find the force he exerts on the ball to give it this upward speed.