1.At what speed does a bicycle and its rider, with a combined mass of 100 kg, have the same momentum as a 1500 kg car traveling aT 1.0M/S?

3. A 57 g tennis ball is served at 45m/.sm/s. If the ball started from rest, what impulse was applied to the ball by the racket?

5. A student throws a 120 g snowball at 7.5m/s at the side of the schoolhouse, where it hits and sticks. What is the magnitude of the average force on the wall if the duration of the collision is 0.15 s?

9. Use the impulse-momentum theorem to find how long a stone falling straight down takes to increase its speed from 5.5m/s to 10.4 m/s

11. A 60 g tennis ball with an initial speed of 32 m/s hits a wall and rebounds with the same speed.Figure P9.11 shows the force of the wall on the ball during the collision. What is the value of Fmax the maximum value of the contact force during the collision?

15. As part of a safety investigation, two 1400 kg cars traveling at 20m/s are crashed into different barriers. Find the average forces exerted on (a) the car that hits a line of water barrels and takes 1.5 s to stop, and (b) the car that hits a concrete barrier and takes 0.10 s to stop.

19. A small, 100 g cart is moving at 1.20 m;son a frictionless track when it collides with a larger, 1.00 kg cart at rest. After the collision, the small cart recoils at 0.850 m/sWhat is the speed of the large cart after the collision?

21.A 2.7 kg block of wood sits on a frictionless table. A 3.0 g bullet, fired horizontally at a speed of 500 m/s, goes completely through the block, emerging at a speed of 220 m/s. What is the speed of the block immediately after the bullet exits?

Chapter 10

55. A 50 g marble moving at 2.0 m/sstrikes a 20 g marble at rest. What is the speed of each marble immediately after the collision? Assume the collision is perfectly elastic and the marbles collide head-on.

Chapter 14

1. A 50 g marble moving at2.0m/s strikes a 20 g marble at rest. What is the speed of each marble immediately after the collision? Assume the collision is perfectly elastic and the marbles collide head-on.