Multiple Choice
Identify the
letter of the choice that best completes the statement or answers the question.
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1.
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The
distance traveled by an object divided by the time it takes to travel that distance is
called
a. average velocity. b. average
speed. c. average acceleration. d. activity.
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2.
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In
order to determine speed, you must know
a. time. b. distance. c. both a and
b. d. neither a nor b.
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3.
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What
is the speed of an object at rest?
a. 15 km/h b. 0 km/h
c. 1 km/h d. This cannot be determined without further
information.
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4.
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The
difference between speed and velocity is that velocity includes
a. direction. b. distance. c. time.
d. weight.
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5.
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An
airplane is flying at 635 km per hour at an altitude of 35 000 m. It is currently over Kansas and is
approximately 16 minutes ahead of its scheduled arrival time. What is its
velocity?
a. 635 km/h b. 16 m/min c. 35
000 m/s d. This cannot be determined without further information about its
direction.
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6.
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Which
of the following does not indicate velocity?
a. 14 m/s
SSE b. 40 km/h toward the town square along the main street c. 80
km/h going from New York toward New Jersey d. 28 km from Los Angeles to Catalina
Island
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7.
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Which
of the following is not a factor in calculating momentum?
a. mass b. direction
c. acceleration d. speed
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8.
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If
you divide momentum by velocity, the result is the value of the
object’s
a. mass. b. direction.
c. energy. d. speed.
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9.
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Whenever an object is standing still, the value(s) that is/are always zero
is/are
a. speed. b. velocity.
c. momentum. d. all of the above.
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10.
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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. b. 60.0 kg•m/s north. c. 60.0 m/s.
d. 60.0 kg/s.
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11.
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If
you are given the mass of an object in pounds, the time in seconds, and the distance in feet, what
must you do before you can calculate the momentum in SI units?
a. convert
the mass to kilograms b. convert the distance to meters c. convert
the time to hours d. all of the above e. only a and b
above
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12.
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Acceleration is defined as the change in velocity divided
by
a. speed. b. final velocity.
c. time. d. distance.
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13.
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The
SI unit for acceleration is
a. mph.
b. ft/sec2. c. m/s2. d. Dv ¸
t.
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14.
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On a
velocity-time graph, a line with a negative slope indicates that the object
is
a. speeding up. b. slowing down.
c. accelerating. d. traveling at a constant speed.
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15.
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When
the velocity of an object changes, it is acted upon by a(n)
a. force. b. inertia. c. momentum.
d. deceleration.
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16.
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The
combination of all of the forces acting on an object is called the
a. total
force. b. union of forces. c. super force. d. net
force.
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17.
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If
the net force acting on a stationary object is zero, then the object will
a. accelerate in the direction of the strongest force. b. remain
at rest. c. begin moving backwards. d. decelerate at a steady rate
of speed.
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18.
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If
the net force on an object is zero then the object has
a. reaction
forces. b. action forces. c. balanced forces.
d. unbalanced forces.
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19.
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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. b. reaction forces.
c. balanced forces. d. unbalanced forces.
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20.
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Which
of the following best illustrates balanced forces?
a. a rock
falling to the ground b. a stretched rubber band being held between two
hands c. a person lifting a heavy box off of the ground d. a crash
between a large truck and a train
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21.
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Friction is defined as
a. force
that opposes motion between two surfaces that are touching. b. rate at which
velocity changes. c. resistance of an object to a change in its
velocity. d. speed of an object in a particular direction.
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22.
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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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23.
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Which
of the following situations best demonstrates the effects of friction?
a. a
parachutist descending to the ground b. a loaded slingshot c. an
apple falling from a tree d. two trucks colliding
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24.
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Which
of the following statements is true?
a. Frictional forces are greatest when both
surfaces are rough. b. When a truck is parked on a hill, friction is the force that
is trying to pull the truck down the hill. c. Air resistance is the opposite force
from friction. d. Friction can exist between two objects even when they are not in
contact.
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25.
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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 objects due to gravity. d. a
force solely dependent on an object’s mass.
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26.
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When
objects are moved further apart from each other, the force of gravity
a. increases. b. stays the same.
c. decreases. d. decreases at first and then increases.
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27.
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Of
the following, the greatest gravitational force would occur between
a. a marble
and a baseball 5 meters apart. b. a loaded freighter on the high seas and
Earth. c. the moon and an astronaut standing on the moon. d. the
moon and Earth.
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28.
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The
law that states that every object maintains constant velocity unless acted on by an unbalanced force
is
a. Newton’s first law of motion. b. Newton’s second
law of motion. c. Newton’s third law of motion. d. the law of
conservation of momentum.
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29.
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The
law that states that for every action force there is an equal and opposite reaction force
is
a. Newton’s first law of motion. b. Newton’s second
law of motion. c. Newton’s third law of motion. d. the law of
conservation of momentum.
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30.
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The
law that states that the unbalanced force acting on an object equals the object’s mass times its
acceleration is
a. Newton’s first law of motion.
b. Newton’s second law of motion. c. Newton’s third law of
motion. d. the law of conservation of momentum.
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31.
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The
SI unit of force, named for the scientist who described the relationship between motion and force, is
called the
a. newton. b. einstein.
c. curie. d. pasteur.
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32.
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One
pound is equal to how many newtons?
a. 4.448 N b. 2.2 N
c. 0.225 N d. 12.5 N
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33.
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Which
of the following units is used to measure acceleration in free fall?
a. m/s b. m·s c. m/s2
d. m2/s2
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34.
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Which
of the following equations is correct?
a. w =
mg b. w ³ mg c. w ¹ mg d. w »
mg
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35.
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Which
of the following is true?
a. Weight and mass are proportional but not
equal. b. Weight is the 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 surface of the moon, but the object's mass stays the same. d. all of
the above.
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36.
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When
air resistance balances the weight of an object that is falling, the
velocity
a. slowly decreases. b. remains
constant. c. rapidly increases. d. none of the above.
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37.
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What
is the approximate terminal velocity of a sky diver before the parachute
opens?
a. 32 mi/h b. 32 km/h c. 320
mi/h d. 320 km/h
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