Preap Physics Exam #5 Numbers 16-20

5 Questions | Total Attempts: 128

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Preap Physics Exam #5 Numbers 16-20

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Questions and Answers
  • 1. 
    16. In what kind of collision is kinetic energy always conserved?
    • A. 

      A. elastic collision

    • B. 

      B. inelastic collision

    • C. 

      C. perfectly elastic collision

    • D. 

      D. perfectly inelasticd. perfectly inelastic collision

  • 2. 
    17. A helium atom collides with another helium atom in an elastic collision. Which of the following is true?
    • A. 

      a. Both momentum and kinetic energy are conserved.

    • B. 

      b. Momentum is conserved but kinetic energy is not conserved.

    • C. 

      c. Kinetic energy is conserved but momentum is not conserved.

    • D. 

      d. Neither momentum nor kinetic energy is conserved.

  • 3. 
    18. Two playground balls collide in an inelastic collision. Which of the following is true?
    • A. 

      a. Both momentum and kinetic energy are conserved.

    • B. 

      b. Momentum is conserved, but kinetic energy is not conserved.

    • C. 

      c. Kinetic energy is conserved, but momentum is not conserved.

    • D. 

      d. Neither momentum nor kinetic energy is conserved.

  • 4. 
    19. In an inelastic collision between two objects with unequal masses,
    • A. 

      a. the total momentum of the system will increase.

    • B. 

      b. the total momentum of the system will decrease.

    • C. 

      c. the kinetic energy of one object will increase by the amount that the kinetic energy of the other object decreases.

    • D. 

      d. the momentum of one object will increase by the amount that the momentum of the other object decreases.

  • 5. 
    20. A billiard ball collides with a stationary identical billiard ball in an elastic head-on collision. After the collision, which of the following is true of the first ball?
    • A. 

      a. It maintains its initial velocity.

    • B. 

      b. It has one-half its initial velocity.

    • C. 

      c. It comes to rest.

    • D. 

      d. It moves in the opposite direction.

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