Directions: Answer all the following questions correctly, put a detailed explanation in every number, pick the letter of the correct answer. I will rate it helpful, thank you very much.

1. The law of conservation of momentum states that.

a. p before is more than p after

b. p before is less than p after

c. p before is the same as p after

d. none of the above

2. If 2 objects collide and stick together, what will happen to their velocities?

a. velocities will decrease

b. velocities will increase

c. velocities will stay the same

d. velocities will both increase and decrease

3. A 10kg toy truck moves at 5m/s East. It collides head-on with a 5kg toy car moving 10 m/s moving west. What is the total momentum of the system?

a. 0 kgm/s

b. 10 kgm/s

c. 30 kgm/s

d. 50 kgm/s

4. When the speed of an object is doubled, its momentum.

a. Doubles

b. Decreases

c. remains the same

d. all of these are correct

5. A big fish swims upon and swallows a small fish at rest. After lunch, the big fish has less____.

a. Mass

b. Momentum

c. velocity

d. speed

6. An 1 kg object moving to the right at 2 m/s collides inelastically with a 1 kg object moving to the left at 2 m/s. What will be the final velocity of both objects?

a. 0m/s

b. 2m/s

c. 4m/s

d. 6m/s

7. Which object listed below has the greatest momentum?

a. A 0.15 kg object rolling at 1 m/s

b. A 0.05 kg object rolling at 0.2 m/s.

c. A 0.15 kg object rolling at 2 m/s.

d. A 0.4 kg object rolling at 2 m/s.

8. A 2 kg cart has a momentum of 16 kg m/s. What is its velocity?

a. 8m/s

b. 32m/s

c. 18m/s

d. 0.125 m/s

9. Which of the following objects has the largest momentum?

a. A 500 kg car traveling at 2 m/s

b. A 70 kg person traveling at 5 m/s

c. A 0.5 kg soccer ball traveling at 1 m/s

d. A 5000 kg elephant standing still

10. When comparing the momentum of two moving objects, which of the following is correct?

a. The object with the higher velocity will have less momentum if the masses are equal.

b. The more massive object will have less momentum if its velocity is greater.

c. The less massive object will have less momentum if the velocities are the same.

d. The more massive object will have less momentum if the velocities are the same.

11. A child with a mass of 23 kg rides a bike with a mass of 5.5 kg at a velocity of 4.5 m/s to the south. Compare the momentum of the child with the momentum of the bike.

a. Both the child and the bike have the same momentum.

b. The bike has a greater momentum than the child.

c. The child has a greater momentum than the bike.

d. Neither the child nor the bike has momentum.

12. It is possible for a small car to have the same momentum as a large truck.

a. true

b. false

c. maybe

d. none of the above

13. A pool player hits the cue ball. It hits the 8 ball. Both balls roll into the pocket, with the cue ball falling into the pocket a few seconds after the 8 ball. This would be an example of:

a. An elastic collision

b. An inelastic collision

c. Momentum being gained in a collision

d. A violation of Newton's Second Law

14. If an object is not moving, it has nonzero momentum because it still has mass.

a. true

b. false

c. maybe

d. none of the above

15. The units for momentum are kg/m/s.

a. true

b. false

c. maybe

d. none of the above

Note: Please answer it all, thank you very much.