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Physics 172, Spring 2009, Test I
TEST 1
Physics 172
General Physics II
Spring 2009
Name: ___________________________________________________ Pledge
Use the space provided for your solutions.
One page of handwritten equations is permitted for this test.
This
sheet must be turned in with your test.
SHOW ALL YOUR WORK.
PLEASE BE NEAT and ORGANIZED!
It is difficult to give partial credit if your solution is too messy to understand.
This test has 13 multiplechoice questions and 1 problem.
You get to choose 11 of the 13 questions to answer.
Answer Circle the correct multiplechoice answer. For full credit, multiplechoice answers must be
accompanied by a
correct, brief explanation.
kx
N
o
==
1
4
899 10
92
πε
./
m
C
2
e
x
C
=
−
16 10
19
.
ε
o
x
C
mN
=
−
885 10
12
2
2
.
1 mile = 5280 ft
weight of Johnny Depp ~ 140 lbs
2.54 cm = 1 inches
12 inches = 1 ft
mean radius of earth = 6.37 x 10
6
m
mass of earth = 5.98 x 10
24
kg
mass sun = 1.99 x 10
30
kg
distance earth to moon = 3.82 x 10
8
m
distance earth to sun = 1.5 x 10
11
m
G = 6.67 x 10
11
N m
2
/ kg
2
1
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View Full DocumentPhysics 172, Spring 2009, Test I
Answer 11 of the following 13 questions.
Make sure it is absolutely clear which 11 I should
grade.
>> Question 1
Let F
1
be the magnitude of the gravitational force exerted on the Sun by Earth and F
2
be the magnitude of the
force exerted on Earth by the Sun.
Which of the following is true about the magnitudes of these forces?
A)
F
1
is greater than F
2
B)
F
1
is equal to F
2
C)
F
1
is less than F
2
D)
F
1
is greater than F
2
for certain distances and F1 is less than F2 for others
Ans.________
Explanation:
>> Question 2
The mass of a hypothetical planet if 1/100 that of Earth and its radius is ¼ that of Earth.
If a person weighs 600
N on Earth, what would the person weigh on this planet?
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 Spring '08
 Field
 Physics

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