1. Find the magnitude of the momentum of a 25 kg cement block falling at 20 m/s.

2. A 2 kg ball is thrown at a wall at 30 m/s. Find the change in momentum in each case. a. The ball bounces back at 20 m/s. b. The ball sticks to the wall c. The ball goes through the wall and continues at 20 m/s.

3. The driver of a 3200 kg car driving at 25 m/s suddenly slams on the brakes for 2.0 seconds. If the brakes apply a 5000 N force against the direction of motion, find: a. The impulse delivered to the car. b. The new momentum of the car c. The resulting speed of the car.

4. The driver of a 700 kg Zamboni speeds up from 8 m/s to 20 m/s over a 9 second interval. a. Find the change in momentum of the Zamboni. b. Find the average force applied to the Zamboni.