Preap Physics Exam #5 Numbers 1-5

5 Questions | Total Attempts: 154

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Preap Physics Exam #5 Numbers 1-5

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Questions and Answers
  • 1. 
    When comparing the momentum of two moving objects, which of the following is correct?
    • A. 

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

    • B. 

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

    • C. 

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

    • D. 

      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. 

      A. the lighter skater has less momentum.

    • B. 

      B. their momenta are equal but opposite.

    • C. 

      C. their total momentum doubles.

    • D. 

      D. Their total momentum decreases.

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

      a. momentum is always conserved.

    • B. 

      b. kinetic energy is always conserved.

    • C. 

      c. neither momentum nor kinetic energy is conserved.

    • D. 

      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. 

      a. was zero while stationary and increased when the person stood.

    • B. 

      b. was greatest while the person sat in the chair.

    • C. 

      c.remained the same.

    • D. 

      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. 

      A. their total momentum triples.

    • B. 

      B. their momenta are equal but opposite.

    • C. 

      C. their total momentum doubles.

    • D. 

      D. their total momentum decreases.

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