College Physics
11th Edition
ISBN: 9781305952300
Author: Raymond A. Serway, Chris Vuille
Publisher: Cengage Learning
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1) A baseball with a mass of 137 g is thrown horizontally with a speed of 40.6 m/s (91 mi/h) at a bat. The ball is in contact with the bat for 1.05 ms and then travels straight back at a speed of 45.4 m/s (102 mi/h). Determine the average force (in N) exerted on the ball by the bat. Neglect the weight of the ball (it is much smaller than the force of the bat) and choose the direction of the incoming ball to be positive.
2)A 4.50 gram bullet is fired from a rifle at a horizontal speed of 210 m/s. If the rifle has a weight of 25.0 N and is initially motionless, determine the recoil speed of the rifle.
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