# Physics Chapter 11

F(elastic)=
-kd (or just kd)
frequency=
1/Time=1/Period
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Time/period=
1/Frequency
V=
fλ(wavelength)
unit for k
N/m
unit for wavelength/λ
m
unit for frequency
Hz
According to Hooke’s law, the force exerted by a spring on an object is proportinal to
a. the mass of the object
b. the displacement of the spring
c. the length of the spring
d. the volume of the object
b
In any system in simple harmonic motion, the restoring force acting on the mass in the system is proportional to
a. displacement
b. the length of a pendulum
d. the mass
d. frequency
a
the spring constant in a given oscillationg mass-spring may be changed by
a. increasing the mass
b. decreasing the mass
c. decreasing the initial displacement
d. none of the above
d
In an oscillating mass-srping system, the velocity of the mass is greatest when the mass is
a. at the point of maximum displacement
b. halfway btwn the equilibrium point and maximum displacement
c. at the point where acceleration is greatest
d. the equilibrium point
d
The period of a pendulum may be decreased by
a. shortening its length
b. increasing the mass of the bob
c. moving its equilibrium point
d. decreasing the mass of the bob
A
the GPE of the bob of a swinging pendulum is at its maximum when the bob is at
a. maximum displacement
b. the equilibrium point
c. the center of its swing
d. minimum displacement
A
Stretching a spring increases ____ energy
a. mechanical kinetic
b. gravitational potential
c. vibrational kinetic
d. elastic potential
d
In a system in simple harmonic motion, the amplitude depends on
a. frequency
b. wavelength
c. the position of the equilibrium point
d. maximum displacement from the equilibrium point
d
In an oscillating mass-spring system, the distance of the maximum compression of the spring is a measure of
a. amplitude
b. frequency
c. period
d. equilibrum
a
A total of 5s passes as a child completes one complete swing on a playground swing. The period of the swing is
a. 1/5s
b. 20s
c. 5s
d. 1s
c
The frequency of a certain pendulum is .5Hz. The period of this pendulum is
a. 0.2s
b. 0.5s
c. 2s
d. 5s
c
which of the following factors has the greatest effect on the frequency of a swinging pendulum?
a. friction
b. amplitude
c. mass
d. length
d
if a given pendulum is moved from earth to a location where the gravitational acceleration is greater than earth’s, the frequency of the pendulum’s swing will
a. increase
b. decrease
c. be unchanged
d. vary with the mass of bob
a
the material through which a mechanical wave travels is
a. a medium
b. empty space
c. ether
d. air
a
when a transverse wave passes through water, water molecules are displaced
a. permanently in the direction of the wave motion
b. permanently in a direction perpendicular to the wave
c. temporarily in the direction of the wave motion
d. temporarily in a direction perpendicular to the wave
d
a wave that is produced by a single motion that does not repeat is a ____ wave
a. transverse
b. continuous
c. pulse
d. compression
c
the distance btwn two troughs of a transverse wave is the wave’s
a. amplitude
b. wavelength
c. frequency
d. rarefaction
b
A _____ wave travels through a medium as a series of compressions and rarefactions
b
a wave is passing through a uniform medium. as the frequency of this wave increases, its wavelength
a. depends on amplitude
b. decreases
c. increases
d. does not change
b
suppose you are dangling your foot in a swimming pool, making ripples (waves) by moving your foot up and down. What could you do to make the ripples travel faster through the water?
a. move your foot up and down more frequently
b. move your foot up and down less frequently
c. move your foot up and down more strongly
d. none of the above
d
the amplitude of a mechanical wave determines how much _____ the wave transfers per unit time
a. energy
b. air
c. wavelength
d. matter
a
when 2 transverse waves traveling through a medium meet and exactly coincide, the resulting displacement of the medium
a. is the sum of the dispacements of each wave
b. is zero
c. is always greater than the displacement of either wave alone
d. is always destructive
a
when 2 waves having displacements in opposite directions meet, ____ occurs
a. complete cancellation
b. no interference
c. constructive interference
d. destructive interference
d
2 waves meet and interfere constructively. which one of the following factors increases?
a. period
b. frequency
c. amplitude
d. wavelength
c
when a wave on a rope strikes a free boundary, the wave is
a. reflected and inverted
b. reflected but no inverted
c. not reflected
d. absorbed
b
a wave pattern on a stretched appears to be stationary. this wave pattern is an example of a
a. longitudinal wave
b. non-periodic wave
c. pulse wave
d. standing wave
d
in a standing wave on a vibrating string, a point that appears to remain stationary is a(n)
a. antinode
b. point of constructive interference
c. node
d. rarefaction
c
2 waves traveling in the same medium are approaching each other. what determines whether constructive or destructive interference occurs when the waves meet and coincide?