Across
- 4. A 0.2 kg rubber ball hits a wall at 10 m/s and bounces straight back at 8 m/s. What is the magnitude of the change in momentum of the ball?
- 6. A 10 kg sled is pushed with an applied force of 50 N. A frictional force of 10 N opposes the motion. What is the sled's acceleration?
- 7. A 70 kg skateboarder is at rest. They throw a 5 kg bowling ball forward with a velocity of 2 m/s. What is the recoil velocity of the skateboarder? (Assume no friction).
- 8. A tug-of-war rope is pulled to the right with 150 N and to the left with 130 N. What is the magnitude and direction of the net force?
- 9. A 0.5 kg baseball is thrown with a velocity of 30 m/s. What is its momentum?
- 11. A hockey player hits a puck, applying a constant force of 80 N for 0.1 seconds. What is the impulse delivered to the puck?
Down
- 1. A small bird flies into the windshield of a large, moving truck. Compare the force the bird exerts on the truck to the force the truck exerts on the bird.
- 2. A 5 kg box is pushed with a net force of 20 N. What is its acceleration?
- 3. A 2 kg ball is initially at rest. It receives an impulse of 10 N·s. What is the ball's final velocity?
- 4. A 1,200 kg car accelerates from rest to 15 m/s in 5 seconds. What is the average net force acting on the car?
- 5. A 3 kg cart moving at 2 m/s collides with a 1 kg cart that is at rest. The two carts stick together. What is their final velocity?
- 10. A student has a mass of 60 kg. What is their weight in Newtons on Earth?