Multiple Choice Identify the
choice that best completes the statement or answers the question.
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1.
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A car traveling to the West begins to slow down as it approaches a traffic
light.
Which statement concerning the motion of the car is
correct?
a. | The car’s acceleration is positive. but the velocity is
negative | b. | The car’s acceleration is negative. The car’s velocity is also
negative. | c. | The acceleration of the car is negative, but the velocity is
positive. | d. | The car’s acceleration is positive. The cars velocity is also
positive. |
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2.
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Two students are pushing a cart as shown in the following diagram.
Two-Part QuestionPart One:
Identify the magnitude and direction of the cart’s motion. Part Two: How is this an example
of the crosscutting concept called stability and change.
a. | Part One: The cart will accelerate to the right with a magnitude of 50 N.
Part Two: When balanced forces act on an object, its position is stable. When unbalanced
forces act on an object, the position of the object changes. | b. | Part One: The
cart will accelerate to the left with a magnitude of 550 N. Part Two: When balanced forces
act on an object, its position is stable. When unbalanced forces act on an object, the position of
the object changes. | c. | Part One: The cart will accelerate to
the right with a magnitude of 350 N. Part Two: When balanced forces act on an object, its
position is stable. When unbalanced forces act on an object, the position of the object changes.
| d. | Part One: The cart will accelerate to the right with a magnitude of 150 N.
Part Two: When unbalanced forces act on an object, its position is stable. When balanced
forces act on an object, the position of the object changes. |
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3.
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You throw a ball directly upwards to the ceiling. It travels up, slows down,
reverses direction, and falls to the floor. Which of the following statements about the
ball’s motion must be true?
a. | The acceleration is the smallest as the ball approaches the
ceiling. | b. | After the ball leaves your hand, acceleration is constant until the ball hits the
floor. | c. | The acceleration increases as it approaches the ceiling but decreases near the
floor. | d. | The acceleration is smallest just before it hits the
floor. |
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4.
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In 1969 astronauts first traveled to the Moon in the Saturn-5/Apollo spacecraft.
Lunar Module | Saturn V-Apollo
Spacecraft | Command Module | | | | | | |
This rocket ship blasted off from the launch pad
in Florida and was propelled with ever increasing speed upwards through the Earth’s atmosphere
flying towards the Moon. Which one of the following graphs best represent the motion of
this rocket ship after it blasted off from the launch pad?
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5.
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The graph below is about a car in Smyrna, Tennessee during a 60-minute
period. Describe the motion of the car during this
time period, and explain what must happen to change the car’s motion.
a. | The car is stationary during this time. To change the car’s motion, it would
have to be acted upon by unbalanced forces. | b. | A distance vs. time graph will not give the
information needed to determine the motion of the car. A speed vs. time graph will be needed
instead. | c. | The car is increasing in speed. It shows a horizontal line, so it must be driving
down a straight road. To change the car’s motion, it would have to be acted upon by net
force. | d. | The car is traveling at a constant speed. To change the car’s motion, it would
have to be acted upon by horizontal forces. |
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6.
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A basketball player shoots a free-throw. The motion of the basketball is shown
below. Describe the motion of the basketball after
it leaves the player’s hands, and explain how this is an example of acceleration.
a. | The ball travels in a curved trajectory in two directions with decreasing speed. This
is acceleration because of the change in direction. | b. | The ball moves downwards and then upwards in an
arc. This is acceleration because of the change in force pulling the ball downwards.
| c. | The ball travels in curved trajectory in a single direction with decreasing speed.
This is acceleration because of the change in velocity. | d. | The ball travels in
a horizontal line to the basket with increasing speed. This is acceleration because of the change in
velocity. |
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7.
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Examine the following information about an object
in motion. Two-Part
Question Part One: Describe the motion of the free-falling object show
above. Part Two: What force changes would have to occur to make this object hover?
a. | Part One: The object is accelerating in an upward direction due to unbalanced
forces. Part Two: The upward force must be decreased by 600 N to make this object
hover. | b. | Part One: It is accelerating upward due to unbalanced forces acting on the
object. Part Two: The downward force must decrease by 400 N to make this object hover.
| c. | Part One: It is accelerating downward due to unbalanced forces acting on the
object. Part Two: The forces above and below the object would have to be equal
(balanced). | d. | Part One: The object is falling at a constant speed downward due to balanced
forces. Part Two: The force below the object must be increased by 200
N. |
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8.
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Examine these two free-body diagrams of a car in motion.
Contrast the motion of
the car in these two diagrams, and select the correct cause and effect description about the first
diagram.
a. | In diagram 02 the car is stationary. In diagram 01 the car is moving
forward. Cause: In the first diagram there is horizontal motion but no vertical
motion. Effect: This horizontal motion will stop the car from moving vertically.
| b. | In diagram 01 the car is moving vertically. In diagram 02 the car is not
moving Cause: In the first diagram there is 100N of upwards force. Effect: The
car in the first diagram will move vertically. | c. | In diagram 01 the car is stationary. In diagram
02 the car is moving forward. Cause: In the second diagram there is no vertical motion.
Effect: Therefore the car in the second diagram also has no horizontal
motion. | d. | In diagram 01 the car is moving backwards. In diagram 02 the car is
stationary. Cause: In the first diagram there is 100N of force to the right. Effect:
Therefore the car in the first diagram will move backwards. |
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Multiple Response Identify one
or more choices that best complete the statement or answer the question.
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9.
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Free-body diagrams show the magnitude and direction of all forces acting on an
object. Multi-Select QuestionSelect
the answer choices below that describe the motion of the object represented in the Free Body
Diagram above (Select 2 choices).
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10.
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Multi-Select Question Which of the following graphs represent
objects demonstrating changes in position? (Select 2 choices)
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