Momentum Conservation Practice Test Quiz

1. What is the principle behind the conservation of momentum in closed systems?

• The total force in a closed system remains constant.
• The total energy in a closed system remains constant.
• The total mass in a closed system remains constant.
• The total momentum in a closed system remains constant.

2. How does momentum behave during an elastic collision?

• Momentum is irrelevant in an elastic collision.
• The total momentum is lost in an elastic collision.
• Momentum can vary freely during an elastic collision.
• The total momentum is conserved in an elastic collision.

3. What is the formula to calculate momentum?

• \( p = m \times v \)
• \( p = m – v \)
• \( p = m + v \)
• \( p = m / v \)

4. In the event of a perfectly inelastic collision, what happens to the objects involved?

• The objects stick together and move with a common velocity.
• The objects bounce off each other completely.
• The objects break apart and lose mass.
• The objects separate and continue with their original velocities.

5. When two objects collide and stick together, how is their momentum distributed?

• The momentum is equally divided between the objects.
• The momentum is lost in the collision.
• Their momentum remains conserved.
• The momentum is doubled after the collision.

6. What occurs to kinetic energy in perfectly elastic collisions?

• It is halved.
• It is conserved.
• It is doubled.
• It is lost as heat.

7. What is the relationship between impulse and momentum change?

• Impulse is the opposite of momentum change.
• The impulse applied to an object equals its momentum change.
• Impulse is less than momentum change.
• Impulse is unrelated to momentum.

8. How do you define a perfectly inelastic collision?

• A perfectly inelastic collision occurs when kinetic energy is completely transformed into potential energy.
• A perfectly inelastic collision is defined as one where two objects stick together after colliding.
• A perfectly inelastic collision happens when two objects bounce off each other without sticking.
• A perfectly inelastic collision is when the total momentum is not conserved during the collision.

9. If two objects have the same mass and collide elastically, how is their velocity affected?

• They move in opposite directions.
• Their velocities remain the same.
• One object stops completely.
• Their velocities are exchanged.

10. What happens to the total momentum in a completely isolated system?

• The total momentum becomes zero.
• The total momentum remains constant.
• The total momentum increases without limit.
• The total momentum can be negative.

11. If a ball rebounds after hitting a wall, how is the impulse related to the change in momentum?

• The impulse is equal to the change in momentum.
• The impulse is the square of the change in momentum.
• The impulse is half the change in momentum.
• The impulse is unrelated to the change in momentum.

12. What unit is momentum measured in?

• N·s
• m/s
• kg·m/s
• J

13. How do you derive force from momentum in motion?

• \( F = m \times a \)
• \( F = \frac{p}{v} \)
• \( F = \frac{\Delta p}{\Delta t} \)
• \( F = p \times v \)

14. If a moving object collides with a stationary object, how is momentum conserved?

• Momentum changes direction and is not retained after the collision.
• Momentum is only conserved for the object that was originally moving.
• Momentum is destroyed when the two objects collide.
• Momentum is transferred from the first object to the second object during the collision.

15. In a collision, how can you find the final velocities based on initial momenta?

• Use conservation of momentum to set the total initial momentum equal to the total final momentum.
• Apply Newton`s second law directly without considering momentum.
• Use only the velocities of the objects to find final velocities.
• Ignore mass and only use initial speeds to determine outcomes.

16. What effect does an increase in mass have on momentum at a constant velocity?

• Momentum remains unchanged.
• Momentum becomes zero.
• Momentum decreases.
• Momentum increases.

17. How does the speed of an object influence its momentum?

• Momentum is independent of speed.
• Momentum decreases with speed.
• Momentum increases with speed.
• Speed does not affect momentum.

18. What must be true about the momentum of two colliding objects in elastic collisions?

• The total momentum before and after the collision is conserved.
• The momentum increases when the objects collide.
• The momentum decreases after the collision.
• The momentum remains constant for one object only.

19. In terms of momentum, what does the term `system` refer to?

• Any random objects in space.
• A single object in motion.
• A specific location in the universe.
• A collection of particles being analyzed for momentum.

20. How does the mass of an object influence its kinetic energy during a collision?

• The mass of an object affects its kinetic energy, as doubling the mass doubles the kinetic energy at constant velocity.
• Kinetic energy is solely determined by an object`s velocity, not its mass.
• The mass of an object does not influence its kinetic energy at all.
• Kinetic energy is inversely proportional to the mass of the object.

21. If two carts collide and stick together, what is the resulting speed if their initial speeds are equal?

• 5 m/s
• 15 m/s
• 0 m/s
• 10 m/s

22. What is the result of a collision in which one object has a significantly larger mass?

• Both objects stop moving after the collision.
• The larger object moves faster than the smaller one.
• The smaller object gains more mass after the collision.
• The smaller object gets pushed back and may not move much.

23. What happens to the velocity of a combined mass after a perfectly inelastic collision?

• The final velocity remains constant before and after.
• The final velocity is greater than the initial velocities.
• The final velocity becomes zero immediately after.
• The final velocity is less than the initial velocities.

24. How do you calculate the impulse experienced by an object during a collision?

• Impulse is determined by the weight of the object multiplied by distance.
• Impulse is equal to the total energy of the object after the collision.
• Impulse is the product of mass and velocity of the object.
• Impulse is calculated by multiplying force by the time duration of the impact.

25. If one object has double the velocity of another, how does that affect their momentum in a collision?

• The object with double the velocity has half the momentum.
• The object with double the velocity has double the momentum.
• The object with double the velocity has three times the momentum.
• The object with double the velocity has no effect on momentum.

26. When calculating momentum, what physical quantities do you need?

• Force and displacement
• Mass and velocity
• Energy and time
• Charge and resistance

27. In perfectly elastic collisions, how do post-collision velocities relate to pre-collision velocities?

• The post-collision velocities are always equal to each other.
• The velocities are related by conservation of momentum.
• The velocities rigidly depend on the mass of the objects.
• The velocities do not change after the collision.

28. What is the net momentum change for two objects in a completely elastic collision?

• The net momentum change is equal to the total mass.
• The net momentum change is zero.
• The net momentum change is positive.
• The net momentum change is negative.

29. In a scenario where two identical balls collide, what remains constant?

• Velocity
• Mass
• Momentum
• Kinetic Energy

30. How can you visually illustrate momentum conservation?

• Use a single ball bouncing on a surface.
• Use a collision simulation with two carts.
• Draw a static diagram of objects.
• Present a graph of speed over time.