Answer Happy

Solve: 1. A 0.0450-kg golf ball at rest acquires a speed of 25.0 m/s when hit by a club. If the average contact time is 2.0 ms, what force acts on the ball? 2. A baseball has a mass of 149 g (a) If it is thrown with a speed of 45.0 m/s and after hitting it its speed is 55.0 m/s in the opposite direction, what is the magnitude of the change in momentum and the momentum applied to it with the bat? (b) If the ball is in contact with the bat for 2.0 ms, find the magnitude of the average force applied by the bat. 3. A soccer player hits the ball with an average force of +1400 N and his foot remains in contact with the ball for 7.9 ms. What is the impulse imparted to this ball? 4. Block A has a mass of 2.0 kg and is moving at a speed of 6.0 m/s toward block B of mass 1.0 kg, which is at rest. If both blocks stay together moving with the same speed, find the final speed of both if linear momentum is conserved.