1) Two children, A and B, are riding on a rotating merry-go-round.Child A is at a greater distance from the axis of rotation thanchild B. Which child has the larger tangential speed?
a) Child A
b) Child B
c) They have the same zero tangential speed.
d) They have the same non-zero tangential speed.
e) There is not enough information given to answer thequestion.
2) A disk and a hoop of the same mass and radius are released atthe same time at the top of an inclined plane. Which object reachesthe bottom of the incline first?
(I disk = .5MR^2 and I hoop = MR^2)
a) The hoop
b) The disk
c) Both reach the bottom at the same time
d) It depends on the angle of inclination.
e) It depends on the length of the inclined surface.
3) Two equal forces are applied to a door. The first force isapplied at the midopint of the door; the second is applied at thedoorknob. Both forces are applied perpendicular to the door. Whichforce exerts the greater torque?
a) the first at the midpoint
b) the second at the doorknob
c) both exert equal non-zero torques
d) both exert zero torques
e) additional information is needed
4) A merry-go-round spins freely when Janice moves quickly to thecenter along a radius of the merry-go-round. It is true to saythat_
a) the moment of inertia of the system decreases and the angularspeed increases.
b) the moment of inertia of the system decreases and the angularspeed decreases.
c) the moment of inertia of the system decreases and the angularspeed remains the same.
d) the moment of inertia of the system increases and the angularspeed increases.
e) the moment of inertia of the system increases and the angularspeed decreases.
5) An astronaut is in a capsule in a stable orbit, about two Earthradii from the center of Earth. Her weight is_
a) zero N
b) the same as on the surface of Earth
c) about 1/2 of her weight on the surface of Earth
d) about 1/3 of her weight on the surface of Earth
e) about 1/4 of her weight on the surface of Earth
6) Planet Z-34 has a mass equal to one-third that of Earth and aradius equal to one-third that of Earth. With g representing, asusual, the acceleration due to gravity on the surface of Earth, theacceleration due to gravity on the surface of Z-34 is_
a) g/3
b) 3 g
c) 6 g
d) g/9
e) 9 g
7) How does the escape speed from Mars compare with that of theEarth?
(M Earth = 9.31 * M Mars; R Earth = 1.88 * R Mars)
a) 222%
b) 22.5%
c) 44.9%
d) 66.2%
e) 20.2%
8) A mass on a spring undergoes simple harmonic motion. When themass is at its maximum displacement from equilibrium, itsinstantaneous velocity_
a) is maximum
b) is less than maximum, but not zero
c) is zero
d) cannot be determined without mass information given
e) cannot be determined without spring constant informationgiven
9) The total mechanical energy of a simple harmonic oscillatoris_.
a) zero as it passes the equilibrium point
b) zero when it reaches the maximum displacement
c) a maximum when it passes through the equilibrium point
d) a minimum when it passes through the equilibrium point
e) constant
1) Two children, A and B, are riding on a rotating merry-go-round.Child A is at a greater distance from the axis of rotation thanchild B. Which child has the larger tangential speed?
a) Child A
b) Child B
c) They have the same zero tangential speed.
d) They have the same non-zero tangential speed.
e) There is not enough information given to answer thequestion.
2) A disk and a hoop of the same mass and radius are released atthe same time at the top of an inclined plane. Which object reachesthe bottom of the incline first?
(I disk = .5MR^2 and I hoop = MR^2)
a) The hoop
b) The disk
c) Both reach the bottom at the same time
d) It depends on the angle of inclination.
e) It depends on the length of the inclined surface.
3) Two equal forces are applied to a door. The first force isapplied at the midopint of the door; the second is applied at thedoorknob. Both forces are applied perpendicular to the door. Whichforce exerts the greater torque?
a) the first at the midpoint
b) the second at the doorknob
c) both exert equal non-zero torques
d) both exert zero torques
e) additional information is needed
4) A merry-go-round spins freely when Janice moves quickly to thecenter along a radius of the merry-go-round. It is true to saythat_
a) the moment of inertia of the system decreases and the angularspeed increases.
b) the moment of inertia of the system decreases and the angularspeed decreases.
c) the moment of inertia of the system decreases and the angularspeed remains the same.
d) the moment of inertia of the system increases and the angularspeed increases.
e) the moment of inertia of the system increases and the angularspeed decreases.
5) An astronaut is in a capsule in a stable orbit, about two Earthradii from the center of Earth. Her weight is_
a) zero N
b) the same as on the surface of Earth
c) about 1/2 of her weight on the surface of Earth
d) about 1/3 of her weight on the surface of Earth
e) about 1/4 of her weight on the surface of Earth
6) Planet Z-34 has a mass equal to one-third that of Earth and aradius equal to one-third that of Earth. With g representing, asusual, the acceleration due to gravity on the surface of Earth, theacceleration due to gravity on the surface of Z-34 is_
a) g/3
b) 3 g
c) 6 g
d) g/9
e) 9 g
7) How does the escape speed from Mars compare with that of theEarth?
(M Earth = 9.31 * M Mars; R Earth = 1.88 * R Mars)
a) 222%
b) 22.5%
c) 44.9%
d) 66.2%
e) 20.2%
8) A mass on a spring undergoes simple harmonic motion. When themass is at its maximum displacement from equilibrium, itsinstantaneous velocity_
a) is maximum
b) is less than maximum, but not zero
c) is zero
d) cannot be determined without mass information given
e) cannot be determined without spring constant informationgiven
9) The total mechanical energy of a simple harmonic oscillatoris_.
a) zero as it passes the equilibrium point
b) zero when it reaches the maximum displacement
c) a maximum when it passes through the equilibrium point
d) a minimum when it passes through the equilibrium point
e) constant
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