Author Question: Alex throws a 0.25-kg rubber ball down onto the floor. The ball's speed just before impact is 4.5 ... (Read 193 times)

kodithompson · **on:** Jul 28, 2018

Alex throws a 0.25-kg rubber ball down onto the floor. The ball's speed just before impact is 4.5 m/s, and just after is 2.9 m/s. What is the change in the magnitude of the ball's momentum?
a. 0.39 kg/m/s
b. 1.9 kg/m/s
c. 1.1 kg/m/s
d. 0.73 kg/m/s
e. 7.4 kg/m/s

Question 2

A 0.10-kg ball is moving at 7.0 m/s when it is hit by a bat, causing it to reverse direction and have a speed of 12.0 m/s. What is the change in the magnitude of the momentum of the ball?
a. 0.50 kg/m/s
b. 5.0 kg/m/s
c. 0.70 kg/m/s
d. 1.9 kg/m/s
e. 1.2 kg/m/s