Multiple Choice
Identify the choice that best
completes the statement or answers the question.
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1.
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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 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. | b. | 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. | c. | 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. | d. | 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.
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2.
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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. The cars velocity is also
positive. | b. | The acceleration of the car is negative, but the velocity is
positive. | c. | The car’s acceleration is negative. The car’s velocity is also
negative. | d. | The car’s acceleration is positive. but the velocity is
negative |
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3.
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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 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. | b. | 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. | c. | 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.
| d. | 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. |
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4.
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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. | 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. | b. | 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. | c. | The car is
stationary during this time. To change the car’s motion, it would have to be acted upon by
unbalanced forces. | 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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5.
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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 moves downwards and then upwards in an arc. This is acceleration because of
the change in force pulling the ball downwards. | b. | The ball travels in a curved trajectory in two
directions with decreasing speed. This is acceleration because of the change in direction.
| 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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6.
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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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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: 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). | 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: 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. | d. | 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. |
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8.
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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. | After the ball leaves your hand, acceleration is constant until the ball hits the
floor. | b. | The acceleration increases as it approaches the ceiling but decreases near the
floor. | c. | The acceleration is smallest just before it hits the floor. | d. | The acceleration is
the smallest as the ball approaches the ceiling. |
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9.
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2nd Law Question
A force of 5N is required to increase the
speed of a box from a rate of 1.0 m/s/s to 3.0 m/s/s within five seconds along a level surface.
What change would most likely require additional force to produce the same results?
a. | if the mass of the box was decreased it would require more force. | b. | if friction was
increased between the box and the surface it would require less force. | c. | if friction was
reduced between the box and the surface it would require more force. | d. | if the mass of the
box was increased it would require more force. |
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10.
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2nd Law Question
The acceleration due to gravity on Earth is
9.8 ,/s2. The force acting on an object on Earth is 16 Newtons.
What is the mass of
this object on Earth?
a. | Mass of the object is 2.6 kilograms | b. | The object’s mass is 156.8
kilograms | c. | The mass is .6125 kilograms | d. | Mass of the object is 1.63
kilograms |
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11.
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2nd Law Question
A small car and big truck are driving down a
two-lane highway on a rainy day. The car is in the left lane, and the truck is in the right lane.
Both vehicles are traveling North at the same speed (70 MPH). Both drivers see a traffic jam up
ahead, and they both slam on theirs brakes with all of their might at the same moment. The car comes
to a halt after traveling 30 feet. The truck, however, does not halt until 120 feet.
Why does
it take the truck longer to come to a complete stop even though both vehicles were moving at the same
speed?
a. | Because both cars were maintaining the same constant velocity. | b. | The mass of the car
is much greater than the mass of the truck. | c. | The mass of the truck is much greater than the
mass of the car. | d. | Because vector quantities and scalar quantities are not the same
thing |
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12.
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2nd Law
Question
Newton’s 2nd Law of Motion states that force is equal to mass times
acceleration.
If the force acting on the object stays the same but the mass increases, what is
most likely to happen to the acceleration of the object?
a. | Acceleration will increase | b. | Acceleration will decrease | c. | Acceleration will
stay the same | d. | Velocity will change but the speed and direction will remain
constant. |
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13.
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3rd Law Question
Two cars collide head-on. At every moment
during the collision, the magnitude of the force the first car exerts on the second is exactly equal
to the magnitude of the force the second car exerts on the first.
How is this collision an
example of Newton’s 3rd Law of Motion?
a. | We do not have enough information to determine the force of the impact as we do not
know the mass or the acceleration of the cars before the collision. | b. | After the collision,
neither car has any velocity, so no momentum is present. It would take an unbalanced force to make
the cars move from the location. | c. | Both cars had momentum and inertia before the
collision. After the collision, both cars no longer have inertia or momentum. | d. | Since the collision
was equal and opposite, we can say that an equal force was exerted on both
cars. |
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14.
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3rd Law QuestionBoth dogs in the picture below have the same
mass, and they both are exerting the same amount of force on the rope toy, What is most likely to happen when the rope
toy breaks in the middle as a result of the forces the dogs are exerting?
a. | The dogs will be thrown backwards, in opposite directions from each other, the same
distance. | b. | One dog will be thrown backwards while the other dog will be able to move
forwards. | c. | As the two dogs are the same mass, neither dog will be thrown
backwards. | d. | The breaking of the rope toy will create unbalanced forces that only affect one of
the dogs, causing one dog to be thrown backwards. |
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15.
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3rd Law Question
A mosquito flying over a highway strikes the
windshield of a truck traveling at a speed of 100 kilometers per hour (62 miles per hour).
Compared to the force magnitude of the truck on the mosquito during this collision, the force
magnitude of the mosquito on the truck is...?
a. | the magnitude is exactly the same | b. | the magnitude is significantly
less. | c. | the magnitude is somewhat less. | d. | the magnitude is significantly
greater. |
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16.
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3rd Law QuestionA science teacher did a demonstration by
dropping two balls together at the same time with the smaller ball resting on the larger ball.
Immediately after the larger ball impacted the floor, the smaller ball was launched upwards. Two-Part
QuestionPart 1: What caused the smaller ball to accelerate upward at such a high
rate? Part 2: Would this same phenomena occur if you used two identical basketballs?
a. | Part 1: The smaller ball traveled with a higher velocity downwards.
Part 2: The basketballs would not reach the same velocity. | b. | Part 1: The
difference in volume caused the smaller ball to accelerate.
Part 2: Basketballs have a
greater mass. Therefore it would have more momentum. | c. | Part 1: The density of the smaller ball
reacted with the density of the larger ball.
Part 2: Another basketball would not reach
the same acceleration as the small ball. | d. | Part 1: The action/reaction effect
launched the smaller ball upwards.
Part 2: A basketball would not reach the same velocity
that the small ball did. |
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17.
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3rd Law QuestionThe diagram below shows a 5.00 kg block at
rest on a horizontal, frictionless table. Gravity is acting on this block, and the acceleration of
gravity on Earth is 9.807 m/s 2. Which of the following diagrams best
represents the force exerted on the block by the table?
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Multiple Response
Identify one or more choices that
best complete the statement or answer the question.
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18.
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2nd Law Question: Multi-Select
On Earth an astronaut
weighs 980 Newtons (about 220 pounds) and has a mass of 100 kilograms. On the Moon, the same
astronaut weighs 162.2 Newtons (about 37 pounds).
What is the mass of this astronaut on the
Moon, and what is the acceleration acting on the astronaut’s body when she is standing on the
Earth? (select 2 choices)
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19.
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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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20.
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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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