Chapter 11: Vibrations And Waves

87 Questions | Total Attempts: 955

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Chapter 11: Vibrations And Waves - Quiz

Questions and Answers
  • 1. 
    The time for one cycle of a periodic process is called the
    • A. 

      Amplitude.

    • B. 

      Wavelength.

    • C. 

      Wavelength.

    • D. 

      Wavelength.

  • 2. 
    For a periodic process, the number of cycles per unit time is called the
    • A. 

      Amplitude.

    • B. 

      Wavelength.

    • C. 

      Frequency.

    • D. 

      Period.

  • 3. 
    For vibrational motion, the maximum displacement from the equilibrium point is called the
    • A. 

      Amplitude.

    • B. 

      Wavelength.

    • C. 

      Frequency.

    • D. 

      Period.

  • 4. 
    A mass on a spring undergoes SHM. When the mass is at its maximum displacement from equilibrium, its instantaneous velocity
    • A. 

      Is maximum.

    • B. 

      Is less than maximum, but not zero.

    • C. 

      Is zero.

    • D. 

      Cannot be determined from the information given.

  • 5. 
    A mass on a spring undergoes SHM. When the mass passes through the equilibrium position, its instantaneous velocity
    • A. 

      Is maximum.

    • B. 

      Is less than maximum, but not zero.

    • C. 

      Is zero.

    • D. 

      Cannot be determined from the information given.

  • 6. 
    A mass on a spring undergoes SHM. When the mass is at maximum displacement from equilibrium, its instantaneous acceleration
    • A. 

      Is a maximum.

    • B. 

      Is less than maximum, but not zero.

    • C. 

      Is zero.

    • D. 

      Cannot be determined from the information given

  • 7. 
    A mass is attached to a vertical spring and bobs up and down between points A and B. Where is the mass located when its kinetic energy is a minimum?
    • A. 

      At either A or B

    • B. 

      Midway between A and B

    • C. 

      One-fourth of the way between A and B

    • D. 

      One-fourth of the way between A and B

  • 8. 
    A mass is attached to a vertical spring and bobs up and down between points A and B. Where is the mass located when its kinetic energy is a maximum?
    • A. 

      At either A or B

    • B. 

      Midway between A and B

    • C. 

      One-fourth of the way between A and B

    • D. 

      None of the above

  • 9. 
    A mass is attached to a vertical spring and bobs up and down between points A and B. Where is the mass located when its potential energy is a minimum?
    • A. 

      At either A or B

    • B. 

      Midway between A and B

    • C. 

      One-fourth of the way between A and B

    • D. 

      None of the above

  • 10. 
    A mass is attached to a vertical spring and bobs up and down between points A and B. Where is the mass located when its potential energy is a maximum?
    • A. 

      At either A or B

    • B. 

      Midway between A and B

    • C. 

      One-fourth of the way between A and B

    • D. 

      None of the above

  • 11. 
    Doubling only the amplitude of a vibrating mass-and-spring system produces what effect on the system's mechanical energy?
    • A. 

      Increases the energy by a factor of two

    • B. 

      Ncreases the energy by a factor of three

    • C. 

      Increases the energy by a factor of four

    • D. 

      Produces no change

  • 12. 
    Doubling only the mass of a vibrating mass-and-spring system produces what effect on the system's mechanical energy?
    • A. 

      Increases the energy by a factor of two

    • B. 

      Increases the energy by a factor of three

    • C. 

      Increases the energy by a factor of four

    • D. 

      Produces no change

  • 13. 
    Doubling only the spring constant of a vibrating mass-and-spring system produces what effect on the system's mechanical energy?
    • A. 

      Increases the energy by a factor of two

    • B. 

      Increases the energy by a factor of three

    • C. 

      Increases he energy by a factor of four

    • D. 

      Produces no change

  • 14. 
    A mass oscillates on the end of a spring, both on Earth and on the Moon. Where is the period the greatest?
    • A. 

      Earth

    • B. 

      The Moon

    • C. 

      Same on both Earth and the Moon

    • D. 

      Cannot be determined from the information given

  • 15. 
    Increasing the spring constant k of a mass-and-spring system causes what kind of change in the resonant frequency of the system? (Assume no change in the system's mass m.)
    • A. 

      The frequency increases.

    • B. 

      The frequency decreases.

    • C. 

      There is no change in the frequency.

    • D. 

      The frequency increases if the ratio k/m is greater than or equal to 1 and decreases if the ratio k/m is less than 1.

  • 16. 
    Increasing the mass M of a mass-and-spring system causes what kind of change in the resonant frequency of the system? (Assume no change in the system's spring constant k.)
    • A. 

      The frequency increases.

    • B. 

      The frequency decreases.

    • C. 

      There is no change in the frequency.

    • D. 

      The frequency increases if the ratio k/m is greater than or equal to 1 and decreases if the ratio k/m is less than 1.

  • 17. 
    Increasing the amplitude of a mass-and-spring system causes what kind of change in the resonant frequency of the system? (Assume no other changes in the system.)
    • A. 

      The frequency increases.

    • B. 

      The frequency decreases.

    • C. 

      There is no change in the frequency.

    • D. 

      The frequency depends on the displacement, not the amplitude.

  • 18. 
    A mass m hanging on a spring has a natural frequency f. If the mass is increased to 4m, what is the new natural frequency?
    • A. 

      4f

    • B. 

      2f

    • C. 

      0.5f

    • D. 

      0.25f

  • 19. 
    A simple pendulum consists of a mass M attached to a weightless string of length L. For this system, when undergoing small oscillations
    • A. 

      The frequency is proportional to the amplitude.

    • B. 

      The period is proportional to the amplitude.

    • C. 

      The frequency is independent of the mass M.

    • D. 

      The frequency is independent of the length L.

  • 20. 
    When the mass of a simple pendulum is tripled, the time required for one complete vibration
    • A. 

      Increases by a factor of 3.

    • B. 

      Does not change.

    • C. 

      Decreases to one-third of its original value.

    • D. 

      Decreases to 1/√3 of its original value.

  • 21. 
    Both pendulum A and B are 3.0 m long. The period of A is T. Pendulum A is twice as heavy as pendulum B. What is the period of B?
    • A. 

      0.71T

    • B. 

      T

    • C. 

      1.4T

    • D. 

      2T

  • 22. 
    When the length of a simple pendulum is tripled, the time for one complete vibration increases by a factor of
    • A. 

      3.

    • B. 

      2.

    • C. 

      1.7.

    • D. 

      1.4.

  • 23. 
    What happens to a simple pendulum's frequency if both its length and mass are increased?
    • A. 

      It increases.

    • B. 

      It decreases.

    • C. 

      It remains constant.

    • D. 

      It could remain constant, increase, or decrease; it depends on the length to mass ratio.

  • 24. 
    Simple pendulum A swings back and forth at twice the frequency of simple pendulum B. Which statement is correct?
    • A. 

      Pendulum B is twice as long as A.

    • B. 

      Pendulum B is twice as massive as A.

    • C. 

      The length of B is four times the length of A.

    • D. 

      The mass of B is four times the mass of A.

  • 25. 
    If you take a given pendulum to the Moon, where the acceleration of gravity is less than on Earth, the resonant frequency of the pendulum will
    • A. 

      Increase.

    • B. 

      Decrease.

    • C. 

      Not change.

    • D. 

      Either increase or decrease; it depends on its length to mass ratio.

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