Physics 11 – Flashcards
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An object oscillates back and forth on the end of a spring.
The object can have zero acceleration and, simultaneously, nonzero velocity.
The object can have zero velocity and, simultaneously, zero acceleration.
The object can have zero velocity and, simultaneously, nonzero acceleration.
The object can have nonzero velocity and nonzero acceleration simultaneously.
answer
The object can have zero acceleration and, simultaneously, nonzero velocity.
The object can have zero velocity and, simultaneously, nonzero acceleration.
The object can have nonzero velocity and nonzero acceleration simultaneously.
question
An object of mass M oscillates on the end of a spring.
To double the period, replace the object with one of mass:
2M.
M/4.
M/2.
4M.
None of the above.
answer
4M.
m/k
question
An object of mass m rests on a frictionless surface and is attached to a horizontal ideal spring with spring constant k. The system oscillates with amplitude A. The oscillation frequency of this system can be increased by
increasing A.
decreasing k.
decreasing m.
More than one of the above.
None of the above will work.
answer
decreasing m.
k/m
question
At a playground, two young children are on identical swings. One child appears to be about twice as heavy as the other.
If you pull them back together the same distance and release them to start them swinging, what will you notice about the oscillations of the two children?
The heavier child swings with a period twice that of the lighter one.
Both children swing with the same period.
The lighter child swings with a period twice that of the heavier one.
answer
Both children swing with the same period.
T of pendulum does not depend on mass
question
A grandfather clock is "losing" time because its pendulum moves too slowly. Assume that the pendulum is a massive bob at the end of a string.
The motion of this pendulum can be sped up by:
shortening the string.
lengthening the string.
decreasing the mass of the bob.
increasing the mass of the bob.
answer
shortening the string.
V= sqrroot(Ft/M) M=m/L
question
Which of the following increases the speed of waves in a stretched elastic cord? (More than one answer may apply.)
Increasing the wave amplitude.
Increasing the wave frequency.
Stretching the elastic cord further.
Increasing the wavelength.
answer
Stretching the elastic cord further.
question
Consider a wave on a string moving to the right, as shown in the figure below.
(Figure 1)
What is the direction of the velocity of a particle of string at point B?
answer
perpendicular
question
A wave transports
both energy and matter. .
matter but not energy.
energy but not matter.
answer
energy but not matter.
