A handball of mass 0.10 kg, traveling horizontally at 25. m/s, strikes a wall and rebounds at 19. m/s. What is the change in the momentum of the ball?
A) 4.4 N-s
B) 1.8 N-s
C) 72 N-s
D) 5.4 N-s
E) 1.2 N-s

Question

Quizplus · Accepted Answer

The change in momentum is calculated as the final momentum minus the initial momentum. The initial momentum is (0.10 kg)(25 m/s) = 2.5 kg·m/s. The final momentum is (0.10 kg)(-19 m/s) = -1.9 kg·m/s. The change in momentum is -1.9 kg·m/s - 2.5 kg·m/s = -4.4 kg·m/s, which is 4.4 N-s in magnitude.

A Handball of Mass 0