AP Physics questions and answers Graded A+
A ball is released from rest from the twentieth floor of a building. After 1 s, the
ball has fallen one floor such that it is directly outside the nineteenth-floor
window. The floors are evenly spaced. Assume air resistance is negligible. What is
the number of floors the ball would fall in 3s after it is released from the
twentieth floor? - ✅✅7 to 10 floors
A student wants to investigate the motion of a ball by conducting two different
experiments, as shown in Figure 1 and Figure 2 above. In Experiment 1, the
student releases a ball from rest and uses a slow-motion camera to film the ball as
it falls to the ground. Using video analysis, the student is able to plot the ball's
horizontal position x and vertical position y as a function of time t. In Experiment
2, the student horizontally rolls the same ball off a table, and uses video analysis
to plot the ball's horizontal position x and vertical position y as a function of time t
starting from the instant the ball leaves the table. The graphs from each
experiment are shown above along with each graph's best-fit curve line.
Which of the following conclusions can the student draw from the graphs, and
why? - ✅✅Since the balls have the same vertical position at any given time,
they reach the ground at the same time.
A student wants to investigate the motion of a ball by conducting two different
experiments, as shown in Figure 1 and Figure 2 above. In Experiment 1, the
student releases a ball from rest and uses a slow-motion camera to film the ball as
it falls to the ground. Using video analysis, the student is able to plot the ball's
horizontal position x and vertical position y as a function of time t. In Experiment
2, the student horizontally rolls the same ball off a table, and uses video analysis
to plot the ball's horizontal position x and vertical position y as a function of time t
starting from the instant the ball leaves the table. The graphs from each
experiment are shown above along with each graph's best-fit curve line.
,In Experiment 1, what is the speed of the ball the instant it makes contact with
the ground? - ✅✅5.4 m/s
A student is provided with a battery-powered toy car that the manufacturer
claims will always operate at a constant speed. The student must design an
experiment in order to test the validity of the claim. Which of the following
measuring tools can the student use to test the validity of the claim? Select two
answers. - ✅✅Photogates placed at the beginning, end, and at various
locations along the track that the car travels on
A meterstick to measure the distance of the track that the car travels on
Two students want to determine the speed at which a ball is released when
thrown vertically upward into the air. One student throws the ball into the air
while the other student measures the total time that the ball is in the air. The
students use a meterstick to measure the release height of the ball. Which of the
following equations should the students use to determine the speed at which the
ball was released? - ✅✅Use y=t0+vy0t+1/2at^2 from the moment in time in
which the ball was released to the moment in time in which the ball hits the
ground.
An object undergoes an acceleration as it travels along a straight, horizontal
section of a track. Which of the following graphs could represent the motion of
the object? Select two answers. - ✅✅Both graphs with a positive slope that do
not start at (0,0)
A motion sensor is used to create the graph of a student's horizontal velocity as a
function of time as the student moves toward and away from the sensor, as
shown above. The positive direction is defined as the direction away from the
, sensor. Which of the following describes the student's final position xf in relation
to the starting position x0 and the student's average horizontal acceleration ax
between 0.0 s and 3.0s? - ✅✅Position xf is farther away from the sensor than
x0, and ax is negative.
A car initially at rest accelerates at 10m/s^2. The car's speed after it has traveled
25 meters is most nearly - ✅✅22.0 m/s
A student performs an experiment in which the horizontal position of a toy car is
recorded on ticker tape from a device that places dots on the tape in equal time
intervals. The series of dots in the figure represents the motion of an object
moving from the negative direction to the positive direction along the horizontal
direction. The time interval between each recorded dot is 1s. Which of the
following experiments could the student have conducted to create the data
shown on the ticker tape? - ✅✅A toy car that initially increases its speed,
travels at a constant speed, and then decreases its speed.
A student wants to launch a toy dart toward a target that hangs from a light
string. At time t=0, the dart is launched with an initial speed v0 at an angle θ0
above the horizontal ground. At the instant the dart is launched, the string is cut
such that the target begins to fall straight down. The positive horizontal direction
is considered to be to the right, and the positive vertical direction is considered to
be up.
A student makes the necessary measurements to create the graph shown, which
represents the vertical component of the velocity as a function of time for the
dart and for the target from t=0 until the instant the dart hits the target. At t=0,
the target is a vertical distance h above the dart. The curves for the dart and the
target each have the same area between them and the horizontal axis. Both
curves also have the same slope. Which of the following is the best method to
A ball is released from rest from the twentieth floor of a building. After 1 s, the
ball has fallen one floor such that it is directly outside the nineteenth-floor
window. The floors are evenly spaced. Assume air resistance is negligible. What is
the number of floors the ball would fall in 3s after it is released from the
twentieth floor? - ✅✅7 to 10 floors
A student wants to investigate the motion of a ball by conducting two different
experiments, as shown in Figure 1 and Figure 2 above. In Experiment 1, the
student releases a ball from rest and uses a slow-motion camera to film the ball as
it falls to the ground. Using video analysis, the student is able to plot the ball's
horizontal position x and vertical position y as a function of time t. In Experiment
2, the student horizontally rolls the same ball off a table, and uses video analysis
to plot the ball's horizontal position x and vertical position y as a function of time t
starting from the instant the ball leaves the table. The graphs from each
experiment are shown above along with each graph's best-fit curve line.
Which of the following conclusions can the student draw from the graphs, and
why? - ✅✅Since the balls have the same vertical position at any given time,
they reach the ground at the same time.
A student wants to investigate the motion of a ball by conducting two different
experiments, as shown in Figure 1 and Figure 2 above. In Experiment 1, the
student releases a ball from rest and uses a slow-motion camera to film the ball as
it falls to the ground. Using video analysis, the student is able to plot the ball's
horizontal position x and vertical position y as a function of time t. In Experiment
2, the student horizontally rolls the same ball off a table, and uses video analysis
to plot the ball's horizontal position x and vertical position y as a function of time t
starting from the instant the ball leaves the table. The graphs from each
experiment are shown above along with each graph's best-fit curve line.
,In Experiment 1, what is the speed of the ball the instant it makes contact with
the ground? - ✅✅5.4 m/s
A student is provided with a battery-powered toy car that the manufacturer
claims will always operate at a constant speed. The student must design an
experiment in order to test the validity of the claim. Which of the following
measuring tools can the student use to test the validity of the claim? Select two
answers. - ✅✅Photogates placed at the beginning, end, and at various
locations along the track that the car travels on
A meterstick to measure the distance of the track that the car travels on
Two students want to determine the speed at which a ball is released when
thrown vertically upward into the air. One student throws the ball into the air
while the other student measures the total time that the ball is in the air. The
students use a meterstick to measure the release height of the ball. Which of the
following equations should the students use to determine the speed at which the
ball was released? - ✅✅Use y=t0+vy0t+1/2at^2 from the moment in time in
which the ball was released to the moment in time in which the ball hits the
ground.
An object undergoes an acceleration as it travels along a straight, horizontal
section of a track. Which of the following graphs could represent the motion of
the object? Select two answers. - ✅✅Both graphs with a positive slope that do
not start at (0,0)
A motion sensor is used to create the graph of a student's horizontal velocity as a
function of time as the student moves toward and away from the sensor, as
shown above. The positive direction is defined as the direction away from the
, sensor. Which of the following describes the student's final position xf in relation
to the starting position x0 and the student's average horizontal acceleration ax
between 0.0 s and 3.0s? - ✅✅Position xf is farther away from the sensor than
x0, and ax is negative.
A car initially at rest accelerates at 10m/s^2. The car's speed after it has traveled
25 meters is most nearly - ✅✅22.0 m/s
A student performs an experiment in which the horizontal position of a toy car is
recorded on ticker tape from a device that places dots on the tape in equal time
intervals. The series of dots in the figure represents the motion of an object
moving from the negative direction to the positive direction along the horizontal
direction. The time interval between each recorded dot is 1s. Which of the
following experiments could the student have conducted to create the data
shown on the ticker tape? - ✅✅A toy car that initially increases its speed,
travels at a constant speed, and then decreases its speed.
A student wants to launch a toy dart toward a target that hangs from a light
string. At time t=0, the dart is launched with an initial speed v0 at an angle θ0
above the horizontal ground. At the instant the dart is launched, the string is cut
such that the target begins to fall straight down. The positive horizontal direction
is considered to be to the right, and the positive vertical direction is considered to
be up.
A student makes the necessary measurements to create the graph shown, which
represents the vertical component of the velocity as a function of time for the
dart and for the target from t=0 until the instant the dart hits the target. At t=0,
the target is a vertical distance h above the dart. The curves for the dart and the
target each have the same area between them and the horizontal axis. Both
curves also have the same slope. Which of the following is the best method to
