Preap Physics Exam #5 Numbers 6-10

5 Questions | Total Attempts: 142

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Preap Physics Exam #5 Numbers 6-10

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Questions and Answers
  • 1. 
    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. 

      A. increased.

    • B. 

      B. remained the same.

    • C. 

      C. decreased.

    • D. 

      D. was conserved.

  • 2. 
    7.  The law of conservation of momentum states that
    • A. 

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

    • B. 

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

    • C. 

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

    • D. 

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

  • 3. 
    8.  When two ice skaters initially at rest push off one another, their final momenta are
    • A. 

      a. equal in magnitude and direction.

    • B. 

      b. equal in magnitude and opposite in direction.

    • C. 

      c. in the same direction but of different magnitudes

    • D. 

      d. in opposite directions and possibly of different magnitudes.

  • 4. 
    9.  When two objects interact in an isolated system,
    • A. 

      a. the momentum of each object is conserved.

    • B. 

      b. the total momentum of the system is zero.

    • C. 

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

    • D. 

      d. the total momentum is always conserved.

  • 5. 
    10.  Conservation of momentum follows from
    • A. 

      A. Newton’s first law.

    • B. 

      B. Newton’s second law.

    • C. 

      C. Newton’s third law.

    • D. 

      D. the law of conservation of energy.

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