# Chapter 11: Vibrations And Waves

87 Questions | Total Attempts: 955  Settings  • 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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