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AP Physics Final Exam Question Bank and Answer
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AP Physics Final Exam Question Bankand Answer
An object of mass 10 kg is released from rest above the surface of a planet such that the
object's speed as a function of time is shown by the graph above. The force due to gravity
exerted on the object is most nearly - correct answer C. 35N
The force diagram above shows a box accelerating to the right on a horizontal surface of
negligible friction. The tension T is exerted at an angle of 30°above the horizontal. If μ is the
coefficient of kinetic friction between the box and the surface, which of the following is a
correct mathematical equation derived by applying Newton's second law to the box? - correct
answer D. a=Tcos(θ)−μ(Mg−Tsin(θ))Ma=Tcos(θ)−μ(Mg−Tsin(θ))M
An Atwood's machine is set up by suspending two blocks connected by a string of negligible
mass over a pulley, as shown above. The blocks are initially held at rest and then released at
time t0=0 s. The speed of the 3 kg block at time t1=2.0s is most nearly - correct answer B.
4.0m/s
The free body diagram shown above is for a 5 kg box on a rough surface being pulled to the
right at a constant speed by a string that is at an angle of 30°above the horizontal. The
coefficient of kinetic friction between the box and the surface is
0.30. The tension in this string is most nearly - correct answer A. 14.47N
The system shown above consists of two identical blocks that are suspended using four cords,
each of a different length. Which of the following claims are true about the magnitudes of the
tensions in the cords? Select two answers. - correct answer B. T1 cos30°=T2 cos60°
C. T3>T4
Students work together during an experiment about Newton's laws. The students use a setup
that consists of a cart of known mass connected to one end of a string that is looped over a
pulley of negligible friction, with its other end connected to a hanging mass. The cart is initially
at rest on a horizontal surface and rolls without slipping when released. The inertia of the cart's
wheels is negligible. Students have access to common laboratory equipment to make
measurements of components of the system.
The students double the mass that hangs from the string. They also replace the original cart
with a new cart that has double the mass. By doubling both masses, how will the tension in the
string and the acceleration of the cart change? - correct answer B. The tension will double, but
the acceleration will stay the same.
,AP Physics Final Exam Question Bank
and Answer
The table shows experimental data of the magnitude of four forces exerted on a 2kg object as it
slides across a horizontal surface. Which of the following could represent the magnitude of the
net force that is exerted on the object? Select two answers. - correct answer A. 6N
B. 10N
An object slides across a horizontal surface such that it slows down due to the force of friction
that is exerted on the object. The object and the direction of its displacement are shown in the
figure. Which of the following free-body diagrams could represent the forces that are exerted
on the object? - correct answer A.
A ball is moved from Earth to a planet that has a gravitational acceleration that is double that of
Earth. How does the gravitational force on the ball when it is on the new planet compare to the
gravitational force on the ball when it is on Earth? - correct answer A. The gravitational force
on the ball when it is on the new planet is double the force on the ball when it is on Earth.
A student predicts that a block sliding down a ramp inclined at 45 degrees should have an
acceleration of approximately 7 m/s2. The block is released from rest, and the student
measures the distance the block travels and the time it takes to travel that distance. The
student determines that the block's acceleration is only 5.5 m/s2. Which of the following is the
most likely reason for the difference between the predicted and calculated accelerations? -
correct answer B. The student's model used to make the prediction did not account for all of
the forces that are exerted on the block.
An object is released from a large height above the ground and takes a very long time to reach
the ground. The only forces exerted on the object are the force of Earth's gravity and the force
of friction exerted by Earth's atmosphere as the object falls. A graph of the object's speed V as a
function of time T is shown above. Which of the following claims best describes the force of
friction exerted on the object? - correct answer A. It is initially zero and increases until it is
equal to the force of gravity.
An object travels down a ramp at a constant acceleration. The object experiences a force of
friction and a gravitational force. Which of the following could be true about the motion of the
object? - correct answer A. The force of friction between the surface and the object is less than
the component of the gravitational force that is parallel to the ramp.
A rocket is continuously firing its engines as it accelerates away from Earth. For the first
kilometer of its ascent, the mass of fuel ejected is small compared to the mass of the rocket.
For this distance, which of the following indicates the changes, if any, in the kinetic energy of
, AP Physics Final Exam Question Bank
and Answer
the rocket, the gravitational potential energy of the Earth-rocket system, and the mechanical
energy of the Earth-rocket system? - correct answer A. Increasing, Increasing, Increasing
An inclined track is secured to a table. The height of the highest point of the track above the
tabletop is h1. The height from the tabletop to the floor is h2. A block of mass M is released
from rest and slides down the track such that all frictional forces are considered to be
negligible. The block leaves the track horizontally and strikes the ground at a distance D from
the edge of the track as shown. Which of the following statements is correct about the
scenario? Select two answers. - correct answer C. The total mechanical energy of the system
containing only the block increases from the moment of release to the moment it strikes the
ground.
D. The total mechanical energy of the block-Earth system remains constant.
The graph above shows velocity v as a function of time t for a 0.50 kg object traveling along a
straight line. The graph has three segments labeled 1, 2, and 3. A rope exerts a constant force
of magnitude FT on the object along its direction of motion the whole time. During segment 2
only, a frictional force of magnitude Ff is also exerted on the object.
For another identical object initially at rest, no frictional force is exerted during segment 2
(between t = 2 s and t = 4 s). A rope exerts the same constant force of magnitude FT as in the
previous scenario. What is the change in the object's kinetic energy during segment 2? -
correct answer C. 12.0 J
The figure above shows the net force exerted on an object as a function of the position of the
object. The object starts from rest at position x = 0 m and acquires a speed of 3.0 m / s after
traveling a distance of 0.090 m. What is the mass of the object? - correct answer B. 0.030 kg
A block of mass 0.10kgis attached and secured to one end of a spring with spring constant
50Nm. The other end of the spring is secured to a wall. The block is pushed against the spring,
which compresses the spring to a position of x=−0.04m. When uncompressed, the end of the
spring that is attached to the block is at a position of x=0.00m. The block-spring system is then
released from rest, and the block travels along a horizontal, rough track. A motion sensor is
placed so that it measures the velocity of the object as it slides along the track. A graph of total
mechanical energy of the block-spring system as a function of position is shown. Which of the
following statements about the block-spring system are true? Select two answers. - correct
answer A. The force exerted on the block by the spring at x=−0.02m is 1 N.
D. The work done by friction as the block travels from x =−0.04m to x= −0.02m is 0.010J.
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