The Law Of Conservation Of Momentum! Physics Trivia Quiz

14 Questions | Total Attempts: 476

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The Law Of Conservation Of Momentum! Physics Trivia Quiz

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Questions and Answers
  • 1. 
    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.

  • 2. 
    Two skaters stand facing each other. One skater’s mass is 60 kg, and the other’s mass is 72 kg. If the skaters push away from each other without spinning,
    • A. 

      The lighter skater has less momentum.

    • B. 

      Their momenta are equal but opposite.

    • C. 

      Their total momentum doubles.

    • D. 

      Their total momentum decreases.

  • 3. 
     In a two-body collision,
    • A. 

      Momentum is always conserved.

    • B. 

      Kinetic energy is always conserved.

    • C. 

      Neither momentum nor kinetic energy is conserved.

    • D. 

      Both momentum and kinetic energy are always conserved.

  • 4. 
    A person sitting in a chair with wheels stands up, causing the chair to roll backward across the floor. The momentum of the chair
    • A. 

      Was zero while stationary and increased when the person stood.

    • B. 

      Was greatest while the person sat in the chair.

    • C. 

      Remained the same.

    • D. 

      Was zero when the person got out of the chair and increased while the person sat.

  • 5. 
    Two swimmers relax close together on air mattresses in a pool. One swimmer’s mass is 48 kg, and the other’s mass is 55 kg. If the swimmers push away from each other,
    • A. 

      Their total momentum triples.

    • B. 

      Their momenta are equal but opposite.

    • C. 

      Their total momentum doubles.

    • D. 

      Their total momentum decreases.

  • 6. 
    A 75 kg person walking around a corner bumped into an 80 kg person who was running around the same corner. The momentum of the 80 kg person
    • A. 

      Increased.

    • B. 

      Remained the same.

    • C. 

      Decreased.

    • D. 

      Was conserved.

  • 7. 
    The law of conservation of momentum states that
    • A. 

      The total initial momentum of all objects interacting with one another usually equals the total final momentum.

    • B. 

      The total initial momentum of all objects interacting with one another does not equal the total final momentum.

    • C. 

      The total momentum of all objects interacting with one another is zero.

    • D. 

      The total momentum of all objects interacting with one another remains constant regardless of the nature of the forces between the objects.

  • 8. 
    When two ice skaters initially at rest push off one another, their final momenta are
    • A. 

      Equal in magnitude and direction.

    • B. 

      Equal in magnitude and opposite in direction.

    • C. 

      In the same direction but of different magnitudes

    • D. 

      In opposite directions and possibly of different magnitudes.

  • 9. 
    When two objects interact in an isolated system,
    • A. 

      The momentum of each object is conserved.

    • B. 

      The total momentum of the system is zero.

    • C. 

      The total momentum is conserved only if the objects move in opposite directions.

    • D. 

      The total momentum is always conserved.

  • 10. 
    Conservation of momentum follows from
    • A. 

      Newton’s first law.

    • B. 

      Newton’s second law.

    • C. 

      Newton’s third law.

    • D. 

      The law of conservation of energy.

  • 11. 
    A 6.0 x 10-2 kg tennis ball moves at a velocity of 12 m/s. The ball is struck by a racket, causing it to rebound in the opposite direction at a speed of 18 m/s. What is the change in the ball’s momentum?
    • A. 

      0.36 kg*m/s

    • B. 

      0 kg*m/s

    • C. 

      0.036 kg*m/s

    • D. 

      1.8 kg*m/s

  • 12. 
    A student stumbles backward off a dock and lands in a small boat. The student isn't hurt, but the boat drifts away from the dock with a velocity of 0.85 m/s to the west. If the boat and student each have a mass of 68 kg, what is the student’s initial horizontal velocity?
    • A. 

      0 m/s

    • B. 

      57.8 m/s

    • C. 

      0.85 m/s

    • D. 

      1.7 m/s

  • 13. 
     A 20.0 kg cannonball is fired from a 2.40 x 103 kg. If the cannon recoils with a velocity of 3.5 m/s backwards, what is the velocity of the cannonball?
    • A. 

      420 m/s

    • B. 

      48,000 m/s

    • C. 

      9.81 m/s

    • D. 

      137 m/s

  • 14. 
    A 50.0 g shell fired from a 3.00 kg rifle has a speed of 400.0 m/s. With what speed does the rifle recoil in the opposite direction?
    • A. 

      6.67 m/s

    • B. 

      6666.67 m/s

    • C. 

      21200 m/s

    • D. 

      1220 m/s

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