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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When
an object’s distance from another object is changing, a. | it is in
motion. | b. | it is speeding. | c. | it has a high
velocity. | d. | it is accelerating. | | |
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2.
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The
basic SI unit of length is the a. | meter. | b. | foot. | c. | inch. | d. | mile. | | |
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3.
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Speed
equals distance divided by a. | time. | b. | velocity. | c. | size. | d. | motion. | | |
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4.
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When
you know both the speed and direction of an object’s motion, you know the a. | average speed of
the object. | b. | acceleration of the object. | c. | distance the
object has traveled. | d. | velocity of the object. | | |
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5.
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You
can show the motion of an object on a line graph in which you plot distance against a. | velocity. | b. | time. | c. | speed. | d. | direction. | | |
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6.
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In
graphing motion, the steepness of the slope depends on a. | how quickly or
slowly the object is moving. | b. | how far the object has moved. | c. | when the object
began moving. | d. | the direction the object is moving. | | |
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7.
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The
rate at which velocity changes is called a. | speed. | b. | direction. | c. | acceleration. | d. | motion. | | |
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8.
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Which
of these is an example of deceleration? a. | a bird taking off for flight | b. | a baseball
released by a pitcher | c. | a car approaching a red light | d. | an airplane
following a straight flight path | | |
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9.
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To
determine the acceleration rate of an object, you must calculate the change in velocity during each
unit of a. | speed. | b. | time. | c. | motion. | d. | deceleration. | | |
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10.
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If
velocity is measured in kilometers per hour and time is measured in hours, the unit of acceleration
is a. | hours. | b. | kilometers per hour. | c. | kilometers per
hour per hour. | d. | kilometers. | | |
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11.
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A
train that travels 100 kilometers in 4 hours is traveling at what average speed? a. | 50
km/h | b. | 100
km/h | c. | 2
km/h | d. | 25
km/h | | |
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12.
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A
place or object used for comparison to determine if something is in motion is called a. | a
position. | b. | a reference point. | c. | a
constant. | d. | velocity. | | |
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13.
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Liters, meters, and grams are all a. | distances. | b. | reference
points. | c. | units. | d. | velocities. | | |
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14.
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On a
graph showing distance versus time, a horizontal line represents an object that is a. | moving at a
constant speed. | b. | increasing its speed. | c. | decreasing its
speed. | d. | not moving at all. | | |
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15.
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The
International System of Units is used a. | only in the United States. | b. | only in
France. | c. | in most of Europe. | d. | all over the
world. | | |
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16.
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If
you know the distance an object has traveled in a certain amount of time, you can
determine a. | the size of the
object. | b. | the speed of the object. | c. | the location of
the object. | d. | the velocity of the object. | | |
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17.
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It is
rare for any motion to a. | stay the same for very long. | b. | change
quickly. | c. | increase in velocity. | d. | decrease in
speed. | | |
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18.
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If
the speed of an object does NOT change, the object is traveling at a a. | constant
speed. | b. | average speed. | c. | increasing
speed. | d. | decreasing speed. | | |
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19.
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Changing direction is an example of a kind of a. | acceleration. | b. | speed. | c. | velocity. | d. | constant rate. | | |
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20.
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If a
bicyclist travels 30 kilometers in two hours, her average speed is a. | 30
km/h. | b. | 60 km/h. | c. | 15
km/h. | d. | 2 km/h. | | |
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21.
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The
moon accelerates because it is a. | in a vacuum in space. | b. | continuously
changing direction. | c. | a very large sphere. | d. | constantly
increasing its speed of orbit. | | |
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22.
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If an
object moves in the same direction and at a constant speed for 4 hours, which of the following is
true? a. | The
object’s speed changed during the 4 hours. | b. | The
object’s velocity did not change. | c. | The object accelerated during the 4
hours. | d. | The object decelerated during the 4
hours. | | |
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23.
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If
you know a car traveled 300 kilometers in 3 hours, you can find its a. | acceleration. | b. | direction. | c. | average
speed. | d. | velocity. | | |
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24.
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In an
acceleration graph showing speed versus time, a straight line shows the acceleration
is a. | decreasing. | b. | increasing. | c. | changing. | d. | constant. | | |
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Short Answer
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Use the diagram to answer each question.
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25.
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What
two variables are plotted in the graph?
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26.
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How
would you describe Kathy’s motion? What does such motion mean?
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27.
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How
far did Kathy jog in the first 4 minutes?
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28.
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What
is Kathy’s average speed?
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29.
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How
long after Kathy started jogging did Rachel begin jogging?
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30.
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Describe Rachel’s motion at 9 minutes.
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Use the diagram to answer each question.
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31.
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What
does the line segment on the graph from 0 to 3 seconds represent? Explain your answer.
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32.
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What
is the acceleration of the ball between 0 and 3 seconds?
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33.
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What
happened to the speed of the ball during the final two seconds?
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34.
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Does
the graph indicate that the ball decelerated? Explain your answer.
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35.
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How
far did the ball move in the final 2 seconds?
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