F Oscillations and Gravitation (7.5-7.6 and 13.1-13.2) Quiz
10 points each (300 points total)
70. The
escape speed from the moon is what fraction of Earth's escape velocity?
(Earth/Lunar mass ratio = 81.3; Earth/Lunar
radius ratio = 3.67)
a. 0.17
b. 0.21
c. 0.41
d. 0.045
71. The
escape velocity is how many times the orbital velocity?
a.
b.
2
c.
d.
4
72. Who
was the first person to realize that the planets move in elliptical paths around
the sun?
a. Kepler
b. Brahe
c. Einstein
d. Copernicus
73. A
satellite encircles Mars at a distance above its surface equal to 3 times the
radius of Mars. The acceleration of
gravity at the satellite, as compared to the acceleration of gravity on the
surface of Mars, is
a. zero.
b. the same.
c. one-third as much.
d. one-ninth as much.
e. one-sixteenth as much.
74. What
is the escape velocity from the solar system (SUN) leaving from our position 93.
million miles from the sun?
a.
4 x 102 m/s b. 4 x 103
m/s c. 4 x 104 m/s d. 4 x
105 m/s
75. Your
starship, the TOP-QUARK, is in a counter-clockwise "parking orbit"
around the planet VULCAN, as shown, in order to achieve escape velocity, the
direction your retro-rockets should be facing is
a. graph A
b. graph B
c. graph C
d. graph D
76. A
spaceship is traveling to the moon. At
what point is it beyond the pull of earth's gravity?
a. When it gets above the atmosphere
b. When it is half-way there
c. When it is closer to the moon
than it is to earth
d. It is never beyond the pull of
earth's gravity.
77. Satellite
A has twice the mass of satellite T, and rotates in the same orbit.
a. The speed of T is twice the speed
of A.
b. The speed of T is half the speed
of A.
c. The speed of T is one-fourth the
speed of A.
d. The speed of T is equal to the
speed of A.
78. Two
asteroids, of the same mass, have a gravitational potential energy U.
If a third asteroid, of the same mass, moves toward them, to a position
such that the distances between the three asteroids are the same, the
gravitational potential energy of the system will have changed by
a. U
b. 2U
c. 3U
d. 4U
79. Consider
a small satellite moving in a circular orbit (radius r) about a spherical planet
(mass M). The period does not
depend upon
a. the planet mass
b. the radius r
c. the satellite mass
d. g at the satellite position
80. A
spherically symmetric planet has four times the earth's mass and twice its
radius. If a jar of peanut butter
weighs 12 N on the surface of the earth, how much would it weigh on the surface
of this planet?
a. 6 N
b. 12 N
c. 24 N
d. None of the above
81. An
astronaut goes out for a "space-walk" at a distance above the earth
equal to the radius of the earth. Her
acceleration will be
a. zero
b. g
c. 1/2 g
d. 1/4 g
82. The
constant K in Kepler's Third Law is the same for all the planets in our solar
system, but is different for planetary systems orbiting other stars.
a. True
b. False
83. Kepler's
3rd law says T2/r3
= K. What does the constant K
depend upon?
a. period
b. size
c. mass
d. temperature
84. The
speed of Halley's comet, while traveling in its elliptical orbit around the sun,
a. is constant.
b. increases as it nears the sun.
c. decreases as it nears the sun.
d. is zero at two points in the
orbit.
85. The
following statements refer to man-made, artificial satellites in orbit around
earth. Which is an accurate
statement?
a. It is possible to have a
satellite traveling at either a high speed or at a low speed in a given circular
orbit.
b. Only circular orbits are possible
for artificial satellites.
c. A satellite in a large diameter
circular orbit will always have a longer period of revolution about the earth
than will a satellite in a smaller circular orbit.
d. The velocity required to keep a
satellite in a given orbit depends on the mass of the satellite.
e. The period of revolution of a
satellite moving about the earth is independent of the size of the orbit it
travels.
86. The
height of the tides is influenced by:
a. the moon
b. the sun
c. the uneven surface of the Earth
d. all of the above
e. none of the above
The following question(s) refers to the
wave shown below.
87. The
amplitude is
a. 2 m.
b. 4 m.
c. 8 m.
d. cannot be determined from given
information.
88. The
frequency is
a. 0.5 Hz.
b. 1 Hz.
c. 2 Hz.
d. 4 Hz.
e. cannot be determined from the
given information.
89. A pendulum makes 12 complete swings in 8 s. (a) What is its frequency? (b) What is its period?
a. 1.5 Hz, 0.67 sec b. 0.67 sec, 1.5 Hz c. 3.5 Hz, 0.286 sec
d. 0.286 sec, 3.5 Hz
90. 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 mass to length ratio (mass density)
91. 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.
92. 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 or B
c. One-fourth of the way between A
and B
d. None of the above
93. A
mass on the end of a massless spring undergoes SHM.
Where is the instantaneous acceleration of the mass greatest?
a. A and C
b. B
c. C
d. A and D
94. 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.
95. The
equation of motion of the wave shown is
a. y = 1.0 sin (pt)
b. y = 0.5 sin (40t)
c. y = 0.5 cos (pt)
d. y = 0.5 cos (40t)
e. none of the above.
96. Increasing
the mass m of a mass-and-spring system causes what kind of change on the
resonant frequency of the system?
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.
97. 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.
98.
99. 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 1.41 times the
length of A.
d. The mass of B is 1.41 times the
mass of A.