Chapter 11: Vibrations And Waves
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- 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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