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Physics 101
FORM 0
[1]
A mass of 375 g hangs from a string that is wrapped around the circumference of a pulley
with a moment of inertia of 0.0125 kg·m
2
and a radius of 26.0 cm. When the mass is
released, the mass accelerates downward and the pulley rotates about its axis as the string
unwinds. What is the tension in the string?
[A]
0.605 N
@1.21 N [e]1.84 N [D] 2.45 N [E] 3.68 N
[2]
An ice skater doing a spin pulls in her arms, decreasing her moment of inertia by a factor
of two. Her rotational kinetic energy
remains unchanged
[B] is cut in half
[e] is decreased by a factor of four
[D]
quadruples
~is
doubled
[3]
The asteroid Geographos has a radius of 2.4 x
10
4
times the Earth's radius, and a mass
of 8.4 x
12
times that of the Earth's mass. How does the gravitational acceleration on
its surface compare to the corresponding value of
9
on Earth?
8.4 x
9
[B] 3.5 x
8
9
<@
1.5
X
4
9
[D] 2.4 x
4
9
[E]
none of these
[4]
A space exploration satellite is orbiting a spherical asteroid whose mass is 4.65
X
10
16
kg,
and whose radius is 39,600 m, at an altitude of 12,400 m above the surface of the asteroid.
Mission Control sends it a signal to fire a short burst of its retro rockets to bring its speed
to zero
m/s.
What is the speed of the satellite when it hits the surface of the asteroid?
06.11
mls
[B] 7.18
[e] 8.29
[D] 9.83
[EJ11.4
[5]
On the Moon, the acceleration of gravity is
916.
1£ a pendulum has a period
T
on Earth,
what will its period be on the
Moon~l\
TI6
[BJ
TI.J£
[e]
T
~TJ6
[E]6T
[6]
The vertical displacement of a string is given by
y(z, t)
(6.00 mm) cos
e';'''' 
What is the speed of propagation of the wave?
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This note was uploaded on 10/16/2011 for the course PHY 101 taught by Professor Ashkenkai during the Spring '08 term at FIU.
 Spring '08
 Ashkenkai
 Physics, Mass

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