Multiple Choice Identify the choice that best completes the
statement or answers the question.
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1
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A force of 1 N accelerates a mass of 1 kg at the rate of 1 m/s2. The
acceleration of a mass of 2 kg acted upon by a force of 2 N is
a. | half as much. | b. | the same. | c. | twice as
much. | d. | none of the above |
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2
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Suppose the force of friction on a sliding object is 35 N. The force needed to
maintain a constant velocity is
a. | 35 N | b. | more than 35 N. | c. | less than 35
N. |
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3
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If the force acting on a cart doubles, what happens
to the cart's acceleration?
a. | It quarters. | b. | It stays the same. | c. | It
quadruples. | d. | It
halves. | e. | It doubles. |
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4
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A push on a 3-kilogram brick accelerates the brick. Neglecting friction, to
equally accelerate a 9-kilogram brick, one would have to push
a. | with 3 times as much force. | b. | with the amount of
force. | c. | with 30 times as much force. | d. | with just as much force. | e. | none of the
above |
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5
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A 12-N falling object encounters 5 N of air resistance. The magnitude of the net
force on the object is
a. | 7 N. | b. | 0 N. | c. | 12
N. | d. | 5 N. | e. | none of the
above |
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6
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How much force is needed to accelerate a 2.0-kg physics book to an acceleration
of 4.0 m/s2?
a. | 24.0 N | b. | 8.0 N | c. | 0.5
N | d. | 0 N | e. | 2.0 N |
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7
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What is the net force in this example?
a. | 1050 Newtons up | c. | 150 Newtons down | b. | 150 Newtons
up | d. | 250 Newtons down |
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8
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A 18-N falling object encounters 3 N of air
resistance. The magnitude of the net force on the object is
a. | 15 N. | b. | 18 N. | c. | 3
N. | d. | 0 N. | e. | none of the above |
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9
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How does acceleration of an object change in relation to its mass? It is
a. | inversely proportional. | b. | directly proportional. | c. | Acceleration
doesn't depend on mass at all. |
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10
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When an object reaches terminal velocity its acceleration is
a. | 9.8 m/s2. | b. | 4.9 m/s2. | c. | 0
m/s2. |
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11
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A tow truck exerts a force of 1500 N on a car, accelerating it at 2 m/s/s. What
is the mass of the car?
a. | 250 kg | b. | 750 kg | c. | 375
kg | d. | 1500 kg | e. | none of the
above |
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12
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The picture below illustrates which of
Newton's three laws?
a. | Newton’s First Law | c. | Newton’s Third Law | b. | Newton’s
Second Law | d. | None of the above |
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13
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A heavy person and a light person parachute together and wear the same size
parachutes. Assuming they open their parachutes at the same time, which person reaches the ground
first?
a. | Neither -- they both reach the ground together. | b. | the light
person | c. | the heavy person |
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14
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Friction is a force that always acts
a. | in the same direction as an object's
motion. | b. | opposite to an object's
motion. | c. | perpendicular to an object's
motion. |
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15
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A tennis ball and a solid steel ball with the same diameter are dropped at the
same time. In the absence of air resistance, which ball has the greater acceleration?
a. | They both have the same acceleration. | b. | The tennis ball | c. | The steel
ball |
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16
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A sportscar has a mass of 3000 kg and accelerates
at 2 meters per second squared. What is the magnitude of the force acting on the
sportscar?
a. | 1500 N. | b. | 4500 N. | c. | 3000
N. | d. | 6000 N. | e. | none of the above |
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17
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A girl pulls on a 9-kg wagon with a constant force of 27 N. What is the
wagon's acceleration?
a. | 3 m/s2 | b. | 243 m/s2 | c. | 0.3 m/s2
| d. | 27 m/s2 | e. | 9
m/s2 |
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18
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A toybox is dragged without acceleration in a straight-line path across a level
surface by a force of 14 N. What is the frictional force between the toybox and the surface?
a. | 14 N | b. | Need more information to
say. | c. | More than 14 N | d. | Less than 14 N |
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19
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A girl pulls on a 5-kg wagon with a constant force
of 20 N. What is the wagon's acceleration?
a. | 4 m/s2 | b. | 20 m/s2 | c. | 100
m/s2 | d. | 5
m/s2 | e. | 0.3
m/s2 |
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20
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A station wagon has a mass of 1500 kg and accelerates at 5 meters per second
squared. What is the magnitude of the force acting on the station wagon?
a. | 300 N. | b. | 2250 N. | c. | 1500
N. | d. | 7500 N. | e. | none of the
above |
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21
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Pressure is defined as
a. | time per area. | b. | velocity per time. | c. | force per
time. | d. | distance per time. | e. | force per area. |
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22
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Accelerations are produced by
a. | velocities. | b. | accelerations. | c. | forces. | d. | masses. | e. | none of the
above |
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23
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A box of supplies weighs 50 N. When held at rest in your hands, the net force on
the box of supplies is
a. | 5.1 N. | b. | 490 N. | c. | 0
N. | d. | 50 N. | e. | none of the
above |
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24
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You pull horizontally on a 50-kg crate with a force of 300 N and the friction
force on the crate is 50 N. The acceleration of the crate is
a. | 5 m/s2. | b. | 7 m/s2. | c. | 6
m/s2. | d. | 2.5 m/s2. |
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25
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The figure shows a block that is being pulled along
the floor. According to the figure, what is the acceleration of the block?
a. | 2 m/s2 | c. | 3
m/s2 | b. | 4
m/s2 | d. | 5 m/s2 |
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26
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How much force is needed to accelerate a 3.0-kg
physics book to an acceleration of 6.0 m/s2?
a. | 0 N | b. | 54.0 N | c. | 18.0
N | d. | 0.5 N | e. | 2.0 N |
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27
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If the force acting on a cart doubles, what happens to the cart's
acceleration?
a. | It quadruples. | b. | It stays the same. | c. | It
halves. | d. | It doubles. | e. | It quarters. |
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28
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A tow truck exerts a force of 3000 N on a car,
accelerating it at 1.5 m/s/s. What is the mass of the car?
a. | 667 kg | b. | 2000 kg | c. | 3000
kg | d. | 1000 kg | e. | none of the above |
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29
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A 12-N falling object encounters 12 N of air resistance. The magnitude of the
net force on the object is
a. | 0 N. | b. | 24 N. | c. | 12
N. | d. | none of the above |
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30
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A 50 kilogram
skateboarder experiences a 20N force as shown. What is the expected acceleration of the
skateboarder?
a. | 0.4 m/s2 | c. | 0.2 m/s2 | b. | 5.0
m/s2 | d. | 1500
m/s2 |
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