What was the force being applied by the pitcher's hand if the ball is in contact with it for 0.2s?
Let's assume that the mass of the ball is , and the final speed is .
Then the accleration of the ball during the contact is:
where is the initial speed of the ball, and is the time of the contact. Thus, obtain:
According to the second Newton's law, the force applied by the pitcher's hand is:
Answer. 30N.
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