1. A golfer tees up a 45 gram golf ball and hits it with her driver. The club head is in contact with the ball for 9.0 milliseconds (ms), and the velocity of the ball immediately after impact is 79 m/s. What force was exerted on the ball? 2. A 2,000 kg car moving at 10 m/s collides head-on with a 2,500 kg car moving in the opposite direction at 15 m/s. The two cars are locked together after impact. What is the final velocity of the two cars? 3. A 16.0 kg rowboat moving north at 12.5 m/s has a head-on collision with a 14.0 kg raft moving south at 16.0 m/s. After the collision the raft moves to the north at 14-4 m/s. What is the velocity of the rowboat after the crash? 4- A wind-up toy car has a mass of 66 g. The car is wound, and then released, going from being at rest to a constant velocity of 0.8 m/s. If the internal force of the winding on the tires is 0.1 N, for how much time does the winding act on the car? 5. A baseball player hits a 2 kg ball that is approaching with a velocity of 45 m/s. After making contact with the bat, the ball has a velocity of 40 m/s in the opposite direction. Seconds later, the ball is caught by an outfielder. Who imparts a greater impulse on the ball, the batter or the outfielder? 6. A 10,000 kg railroad car traveling north at 10 m/s collides with a 5,000 kg rail car also moving north but at an unknown speed. After the collision, the two cars lock together and move north at 8 m/s. How fast was the second car moving before the impact