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How much force is needed for a pitcher to accelerate a .20kg ball from rest to...

How much force is needed for a pitcher to accelerate a .20kg ball from rest to a speed of 23 m/s if he throws through a distance of 2.2m?

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Answer #1

Mass of the ball is m=0.20kg

Initial the ball was at rest, initial velocity of the ball is vi=0

Final velocity of the ball is vf=23m/s

Distance covered during the throw is d=2.2m

Assuming the acceleration of the ball a is constant, the motion is governed by kinematics equations. To find acceleration we use

By Newton's second law of motion, the force required to produce this acceleration is

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