A baseball pitching machine works by rotating a light and stiff rigid rod about a horizontal axis

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A baseball pitching machine works by rotating a light and stiff rigid rod about a horizontal axis until the ball is moving toward the target. Suppose a 144 g baseball is held 85 cm from the axis of rotation and released at the major league pitching speed of 85 mph. 

a. What is the ball's centripetal acceleration just before it is released? 

b. What is the magnitude of the net force that is acting on the ball just before it is released?

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College Physics A Strategic Approach

ISBN: 9780321595492

2nd Edition

Authors: Randall D. Knight, Brian Jones, Stuart Field

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