UIC PHYSICS 105 Spring 2012 Practice Exam 3
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of
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UIC Physics 105
Midterm Practice Exam 3
Best if used by April 30, 2012
(2 Hours)
PROBLEM
POINTS
SCORE
Multiple
Choice
30
Short
Problem 1
10
Short
Problem 2
10
Short
Problem 3
10
Short
Problem 4
10
Short
Problem 5
10
Long
Problem
20
Total
100
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UIC PHYSICS 105 Spring 2012 Practice Exam 3
Page
2
of
7
MULTIPLE CHOICE
(3 points each)
Clearly circle the letter of the best answer. No points are deducted for incorrect answers.
MC1:
If Martian Orbiter I is sailing around the planet in a circle which has an orbital radius nine times
that of Martian Orbiter II, who’s speed is
v
2
, what is the speed of Martian Orbiter I?
(A)
v
1
=
(1/9)
v
2
(B)
v
1
=
(1/3)
v
2
(C)
v
1
=
v
2
(D)
v
1
=
3
v
2
MC2:
A satellite moves around the Earth in a circular orbit of radius
r
with speed
v
0
. Suddenly, an
explosion breaks the satellite into two pieces, with masses
m
and 4
m
. Immediately after the explosion
the smaller piece of mass
m
is stationary with respect to the Earth and falls directly toward the Earth.
The speed
v
4
m
of the larger piece immediately after explosion is:
(A)
v
4
m
=
(1/4)
v
0
(B)
v
4
m
=
v
0
(C)
v
4
m
=
(5/4)
v
0
(D)
v
4
m
=
5
v
0
.
MC3:
A mass m = 450 g oscillates from a vertically hanging light spring with a period of 0.55 s. It
started by being compressed 10 cm from the equilibrium position (where y = 0) and released. How
long will it take to get to the equilibrium position for the first time?
(A) 0.14 s
(B) About 0.28 s (onehalf period)
(C) 0.55 s
(D) The mass will never reach equilibrium.
MC4:
A damped harmonic oscillator involves a block of mass m = 2 kg, a spring with k = 10 N/m, and
a damping force with damping constant
b
= 0.1 kg/s. Initially it oscillates with amplitude of 20 cm.
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 Spring '12
 Unkown
 Physics, Mass, Special Relativity, Wavelength, Doubleslit experiment, UIC Physics

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