A 0.750 kg ball falls directly down onto concrete, hitting it with a speed of 12.0 m/s and rebounding directly upward with a speed of 3.00 m/s. Extend a y axis upward.
(a) What is the change in the ball's momentum?
( kg·m/s )
(b) What is the impulse on the ball?
( N·s )
(c) What is the impulse on the concrete?
( N·s )