AP Physics C: Mechanics - Unit 2 Progress
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A person is cleaning a wall by pushing a brush against the wall, as
shown in the figure. The person is pushing the brush upward with an
increasing speed. Which of the following free-body diagrams best
represents the motion described? - Correct Answers ✅D. 3 vectors.
This figure shows a vector pointing up and to the right. The component
to the right is approximately equal to the vector to the left. The
component upward is greater than the vector downward. This would
indicate a net force and acceleration directed upward. Thus, if the
brush is moving upward, it will be speeding up.
A block of mass m is initially moving on a rough horizontal surface as
shown in Figure 1. Figure 2 shows the four forces acting on the block.
Which of the following best describes the motion of the block at the
moment shown in the two figures? - Correct Answers ✅C. The block
is moving to the right and slowing down.
A wood block is placed on a rough surface. The surface starts
horizontal, and one end is then raised so that the angle the surface
makes with the horizontal gradually increases until, at an angle θ, the
block begins to move down the surface, as shown in the figure. From
this observation, which of the following can be concluded for angles
greater than θ ? - Correct Answers ✅C. The component of the
gravitational force along the surface is greater than the frictional force.
The drag force on a falling coffee filter can be modeled as a linear
function with respect to velocity, FD→=−bv, where b is a positive
, AP Physics C: Mechanics - Unit 2 Progress
Check MCQ Exam Questions
constant related to the surface area and shape of the coffee filter. The
teacher demonstrates how the value of constant bb can be determined
by releasing coffee filters from rest and having them fall toward a
motion detector, as shown. The students repeat the activity and use
the motion detector to measure the position, velocity, and acceleration
of different coffee filters as they fall. Which of the following would
provide the data needed to determine the value of b? - Correct
Answers ✅E. Stack multiple coffee filters in order to vary the weight
of the system without changing the surface area and measure the
terminal velocity of the coffee filters.
A particle is moving with a constant velocity in the +x-direction. When
the particle reaches the origin, a constant force is exerted on it in the
+y-direction. Which of the following graphs best shows the path the
particle will follow? - Correct Answers ✅A. Parabolic Up. Since the
force is in the y-direction, the particle will continue to move at a
constant speed in the x-direction and accelerate in the y-direction. This
will create a parabolic path around the y-axis.
A ball is thrown straight down from the top of a building with a speed
greater than its terminal speed vT. Which of the following graphs best
represents the speed v of the ball as a function of time t while it falls to
the ground? - Correct Answers ✅C. Above, decreasing towards and
almost touching Vt. The ball starts with a speed greater than the
terminal velocity, and the speed should decrease to a value
approaching the terminal speed.
Check MCQ Exam Questions
A person is cleaning a wall by pushing a brush against the wall, as
shown in the figure. The person is pushing the brush upward with an
increasing speed. Which of the following free-body diagrams best
represents the motion described? - Correct Answers ✅D. 3 vectors.
This figure shows a vector pointing up and to the right. The component
to the right is approximately equal to the vector to the left. The
component upward is greater than the vector downward. This would
indicate a net force and acceleration directed upward. Thus, if the
brush is moving upward, it will be speeding up.
A block of mass m is initially moving on a rough horizontal surface as
shown in Figure 1. Figure 2 shows the four forces acting on the block.
Which of the following best describes the motion of the block at the
moment shown in the two figures? - Correct Answers ✅C. The block
is moving to the right and slowing down.
A wood block is placed on a rough surface. The surface starts
horizontal, and one end is then raised so that the angle the surface
makes with the horizontal gradually increases until, at an angle θ, the
block begins to move down the surface, as shown in the figure. From
this observation, which of the following can be concluded for angles
greater than θ ? - Correct Answers ✅C. The component of the
gravitational force along the surface is greater than the frictional force.
The drag force on a falling coffee filter can be modeled as a linear
function with respect to velocity, FD→=−bv, where b is a positive
, AP Physics C: Mechanics - Unit 2 Progress
Check MCQ Exam Questions
constant related to the surface area and shape of the coffee filter. The
teacher demonstrates how the value of constant bb can be determined
by releasing coffee filters from rest and having them fall toward a
motion detector, as shown. The students repeat the activity and use
the motion detector to measure the position, velocity, and acceleration
of different coffee filters as they fall. Which of the following would
provide the data needed to determine the value of b? - Correct
Answers ✅E. Stack multiple coffee filters in order to vary the weight
of the system without changing the surface area and measure the
terminal velocity of the coffee filters.
A particle is moving with a constant velocity in the +x-direction. When
the particle reaches the origin, a constant force is exerted on it in the
+y-direction. Which of the following graphs best shows the path the
particle will follow? - Correct Answers ✅A. Parabolic Up. Since the
force is in the y-direction, the particle will continue to move at a
constant speed in the x-direction and accelerate in the y-direction. This
will create a parabolic path around the y-axis.
A ball is thrown straight down from the top of a building with a speed
greater than its terminal speed vT. Which of the following graphs best
represents the speed v of the ball as a function of time t while it falls to
the ground? - Correct Answers ✅C. Above, decreasing towards and
almost touching Vt. The ball starts with a speed greater than the
terminal velocity, and the speed should decrease to a value
approaching the terminal speed.
