Download SPH3U Forces Test – Multiple Choice

SPH3U Forces Test – Multiple Choice
*Identify the letter of the choice that best completes the statement or answers the question.
*Write your final answer to each of the questions on your test paper with all of your other solutions.
*Please DO NOT WRITE anywhere on these pages. Use scrap paper for rough work.
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1. When you place your hand on a desk, the pressure you feel against your hand results from
a. the gravitational force
b. the strong nuclear force
c. the weak nuclear force
d. the electromagnetic force
e. a combination of the weak and strong nuclear forces
2. A hockey puck slides along an ice surface shortly after it has left the hockey stick that propelled it. Which of
the following free-body diagrams best represents the hockey puck?
a. A
d. D
b. B
e. E
c. C
3. An elevator is suspended by a cable and moves upward. Which of the following free-body diagrams best
represents the forces acting on the elevator?
a. A
d. D
b. B
e. E
c. C
4. Study the free-body diagram below and choose the statement that best describes the object's motion.
a.
b.
c.
d.
e.
The object will accelerate north.
The object will be motionless.
The object will accelerate northeast.
The object will travel with uniform motion.
The object will travel north with a constant velocity.
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5. Study the free-body diagram below and determine what additional force(s) would be required for the object to
achieve uniform motion.
a. 1 N [W]
d. 2 N [S] and 1 N [E]
b. 1 N [E]
e. 2 N [S] and 1 N [W]
c. 2 N [N] and 1 N [W]
6. The free-body diagram of a 4.0-kg object is shown below. What additional force must act so that the object
has an acceleration of 2.5 m/s2 [W]?
a. 14.0 N [W]
d. 6.0 N [W]
b. 10.0 N [W]
e. 4.0 N [W]
c. 8.0 N [W]
7. A 2.5  103 kg car is travelling due west at 30 m/s when the brakes are applied, exerting a force of 5.0  103 N
[E]. What is the car's acceleration due to the braking?
a. 2.0 m/s2 [W]
d. 15 m/s2 [E]
2
b. 2.0 m/s [E]
e. 2.0 m/s [E]
c. 15 m/s2 [W]
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8. If you weighed 112 N on the Moon where g = 1.6 N/kg, how much would you weigh on Earth?
a. 1.1  102 N
d. 1.1  104 N
4
b. 1.7  10 N
e. 6.9  103 N
2
c. 6.9  10 N
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9. If the strength of the frictional force is equal to the applied force and oppositely directed, and assuming that
all other forces may be ignored, the object
a. must be at rest
b. must be just about to move
c. may be at rest or moving at uniform velocity
d. must be accelerating
e. must be slowing down
____ 10. Two hockey players shove each other at the same time. Player A has a mass of 105 kg and accelerates at a
rate of 3.0 m/s2 [Left]. If player B has a mass that is 10 kg smaller than that of player A, at what rate will he
accelerate?
a. 2.8 m/s2 [Right]
d. 3.3 m/s2 [Left]
2
b. 2.8 m/s [Left]
e. 1.6 m/s2 [Right]
2
c. 3.3 m/s [Right]
Chapters 1-3 Test
Answer Section
MULTIPLE CHOICE
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20.
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C
A
B
A
E
E
D
D
D
A
C
E
C
B
C
C
C
B
A
C
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K/U
C
C
C
C
K/U
I
K/U
I
I
I
I
I
K/U
K/U
K/U
K/U
K/U
K/U
K/U
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