Multiple Choice
Identify the
choice that best completes the statement or answers the question.
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1.
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How much does a 59.0 kg woman weigh on Earth?
a. | 6.02 N | c. | 145 lb | b. | 59.0 lb | d. | 578 N |
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2.
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Orbital motion is a combination of
a. | mass and friction. | c. | acceleration and gravity. | b. | forward motion and
free fall. | d. | weight and
vertical velocity. |
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3.
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Which statement about weight is incorrect?
a. | An object weighs more on the moon than it weighs on Earth. | b. | A change in an
object’s location can change the object’s weight. | c. | An object’s
weight is directly proportional to its mass. | d. | The weight of an object depends on
gravity. |
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4.
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Astronauts “float” when inside an orbiting spaceship because they
are
a. | weightless. | c. | in free fall. | b. | in a vacuum. | d. | outside Earth’s
gravity. |
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5.
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Which is an example of projectile motion?
a. | a rolling bowling ball | c. | a balloon rising in the air | b. | a dart thrown at a
dart board | d. | a high-speed
train accelerating |
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6.
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Whenever a force is exerted, another force occurs that is _____ in size, and
_____ in direction.
a. | equal, same | c. | equal, opposite | b. | smaller, same | d. | smaller,
opposite |
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7.
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The force exerted on the racket by a hit tennis ball is the
a. | gravitational force. | c. | acceleration. | b. | reaction force. | d. | action force. |
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8.
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Which statement about action-reaction force pairs is incorrect?
a. | They act on the same object. | c. | They occur at the same
time. | b. | They always occur in pairs. | d. | They are equal and opposite. |
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9.
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An object’s momentum is determined by the object’s
a. | weight and velocity. | c. | mass and velocity. | b. | mass and acceleration. | d. | weight and
acceleration. |
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10.
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Two identical cars are traveling at equal speeds. One is going north and the
other south. If they collide head-on and stick together, what will happen to the motion of the
cars?
a. | Both cars will move north. | c. | Both cars will move
south. | b. | Both cars will move east. | d. | Both cars will stop. |
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11.
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What is the momentum of a 255 g apple falling at 16.0 m/s?
a. | 4.08 m/s2 downward | c. | 15.9 m/s2
downward | b. | 4.08 kg • m/s downward | d. | 15.9 kg • m/s downward
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12.
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Which of the following has a momentum of zero?
a. | a newspaper lying on a table | c. | a leaf falling to the
ground | b. | a plane flying through the air | d. | All of the
above |
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13.
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When a moving bowling ball hits a pin, some of the ball’s momentum
a. | doubles in force. | c. | is transferred to the pin. | b. | increases the
pin’s mass. | d. | is
lost. |
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14.
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Calculate the velocity of a 90.5 kg man running south with a momentum of 389 kg
• m/s.
a. | 0.233 m/s south | c. | 23.3 m/s south | b. | 4.30 m/s south | d. | 35.2 m/s south |
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15.
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How does the total momentum of two objects before a collision compare with the
total momentum after the collision?
a. | It is the same. | c. | It is equal to zero | b. | It is less. | d. | It is greater. |
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16.
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If you divide momentum by velocity, the result is the value of the
object’s
a. | mass. | c. | energy. | b. | direction. | d. | speed. |
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17.
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A 10.0 kg dog chasing a rabbit north at 6.0 m/s has a momentum of
a. | 0.6 kg m/s. | c. | 60.0 m/s. | b. | 60.0 kg m/s north. | d. | 60.0 kg/s. |
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18.
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When the velocity of an object changes, it is
acted upon by a(n) a. | force. | c. | momentum. | b. | inertia. | d. | deceleration. |
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19.
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If the net force on an object is zero, then the object has
a. | reaction forces. | c. | balanced forces. | b. | action forces. | d. | unbalanced
forces. |
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20.
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When objects are moved further apart from each other, the force of gravity
between them
a. | increases. | c. | decreases. | b. | stays the same. | d. | decreases at first then
increases. |
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21.
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The SI unit of force, named after the scientist who described the relationship
between motion and force, is called the
a. | newton. | c. | curie. | b. | einstein. | d. | pasteur |
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22.
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When air resistance balances the weight of a falling object, the velocity
a. | slowly decreases. | c. | rapidly increases. | b. | remains constant. | d. | None of the
above |
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23.
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The weight of an object can be calculated by multiplying mass by
a. | distance. | c. | velocity. | b. | speed. | d. | free-fall
acceleration. |
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24.
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Which object does not have momentum?
a. | a fish swimming in a pond | c. | a rock by the side of the
road | b. | a feather falling to the ground | d. | a boulder rolling down a
hill |
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25.
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What is the reaction force when you place a cup on a table?
a. | the force of the cup on the table | c. | the force of gravity on the
table | b. | the force of the table on the cup | d. | the force of gravity on the
cup |
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26.
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Which of the following is not a factor in calculating momentum?
a. | mass | c. | acceleration | b. | direction | d. | speed |
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27.
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Whenever an object is standing still, which value is always zero?
a. | speed | c. | momentum | b. | velocity | d. | All of the
above |
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28.
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A tug-of-war that results in one team pulling the other across the line is an
example of
a. | action forces. | c. | balanced forces. | b. | reaction forces. | d. | unbalanced
forces. |
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29.
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A force is continuously applied to an object, causing it to accelerate. After a
period of time, however, the object stops accelerating. What conclusions can be drawn?
a. | The mass of the object has increased. | b. | Gravity on the object has
increased. | c. | The object is experiencing some kind of friction. | d. | The momentum of the
object has reached a maximum. |
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30.
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Weight is best described as
a. | an object’s resistance to acceleration. | b. | what causes an
object to fall. | c. | the downward force exerted on an object due to gravity. | d. | a force solely
dependent on an object’s mass. |
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31.
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Which of the following units is used to measure acceleration?
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32.
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Which of the following is true?
a. | Weight and mass are proportional but not equal. | b. | Weight is
gravitational force an object experiences due to its mass. | c. | The weight of an
object on Earth is greater than the weight of the same object on the moon, but the object’s
mass stays the same. | d. | All of the
above |
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33.
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The tendency of an object at rest to remain at rest is
a. | inertia. | c. | free fall. | b. | momentum. | d. | acceleration. |
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34.
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Near Earth’s surface, the strongest gravitational force would occur
between an elephant and
a. | the sun. | c. | a cat. | b. | the moon. | d. | Earth. |
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35.
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Near Earth’s surface, an object’s free-fall acceleration increases
as its
a. | mass increases. | c. | speed increases. | b. | weight increases. | d. | None of the
above |
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