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Test Bank, Question 31 complete the following statement a. the kinetic energy of the system is conserved. b. the net external force acting on the two-body system is zero. c. both bodies come to rest. d. the internal forces of the two body system cancel in action-reaction pairs e. the collision is perfectly elastic Momentum will be conserved in a two-body collision only i Answer: 11. Test Bank, Question 13 A bat strikes a o.oso-kg baseball so that its velocity changes by +32 m/s in 0.080 s. With what average force was the ball struck? a. -200 N b. +20 N c +10N d. +200 N e. -20 N Answer: 12. Test Bank, Question 5 A 1.0-kg ball has a velocity of 12 m/s downward just before it strikes the ground and bounces up with a velocity of 12 m/s upward. What is the change in momentum of the ball? a. 12 kg b. m/s, downward 24 kg m/s, downward zero kg m/s 12 kg m/s, upward d. e24 kg m/s, upward Answer: page I know the answers I just need the work worked out for each problem
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