AP Physics Unit 3 progress check Parts A&B
(answered_2023.)
AP Physics: Unit 3 Progress Check: MCQ Part A
Planet X has a mass of MM and a radius of RR. Planet Y has a mass of 3M3M and
a radius of 3R3R. Identical satellites orbit both planets at a distance RR above
their surfaces, as shown above. The planets are separated by such a large
distance that the gravitational forces between them are negligible.
How does the magnitude of the gravitational force FYFY exerted by Planet Y on
its satellite compare to the gravitational force FXFX exerted by Planet X on its
satellite?
FY=3/4FX
Planet X has a mass of MM and a radius of RR. Planet Y has a mass of 3M3M and
a radius of 3R3R. Identical satellites orbit both planets at a distance RR above
their surfaces, as shown above. The planets are separated by such a large
distance that the gravitational forces between them are negligible.
How does the gravitational field gXgX at the surface of Planet X compare with the
gravitational field gYgY at the surface of Planet Y?
gX=3gY
A moon orbits a planet in a nearly circular orbit of radius RR, as shown in the
figure.
Which of the following free-body diagrams could be used to analyze the forces
exerted on the moon when it is at the position indicated in the figure?
Gravity is going toward the right
A moon orbits a planet in a nearly circular orbit of radius RR, as shown in the
figure.
The moon has a mass of 1×1022 kg1×1022 kg, and the gravitational field strength
at a distance RR from the planet is 0.001 N/kg0.001 N/kg. What is the gravitational
force exerted on the moon while it is in orbit around the planet?
1×10^19 N
A moon orbits a planet in a nearly circular orbit of radius RR, as shown in the
figure.
Astronomers making careful observations of the moon's orbit discover that the
orbit is not perfectly circular, nor is it elliptical. Which of the following statements
supports this observation?
There is another celestial body that exerts a gravitational force on the moon.
Two containers of water can have their individual masses varied by adding or
removing water. The containers are initially a distance dd apart, as measured
from their centers, and are filled with water so that each has a mass MM, as
shown in Figure 1 above. The gravitational force that one container exerts on the
other is F0F0. Water is then added to one container so that its mass increases to
1.5M1.5M, and water is removed from the other container so that its mass
, decreases to 0.5M0.5M, as shown in Figure 2. What is the new gravitational force
exerted on one container by the other?
3/4F0
Satellite AA orbits a planet at a distance dd from the planet's center with a
centripetal acceleration a0a0. A second identical satellite BB orbits the same
planet at a distance 2d2d from the planet's center with centripetal acceleration
abab. What is the centripetal acceleration abab in terms of a0a0 ?
a0/4
A student must conduct two experiments so that the inertial mass and
gravitational mass of the same object can be determined. In the experiment to
find the object's gravitational mass, the student ties one end of a string around
the object with the other end tied to a spring scale so that the object can
vertically hang at rest. In the experiment to find the object's inertial mass, the
student uses a spring scale to pull the object, starting from rest, across a
horizontal surface with a constant applied force such that frictional forces are
considered to be negligible. In addition to the spring scale, the student has
access to other measuring devices commonly found in a science laboratory.
Which of the following lists the essential measuring devices the student can use
to collect the data necessary to find the object's gravitational and inertial mass?
Meterstick and timer
Two experiments are conducted are conducted to determine the mass of an
object. In Experiment 1, the object's weight is measured by using an electronic
balance once the object has been placed at rest on the balance. In Experiment 2,
the object is pulled along a horizontal surface with a spring scale such that the
force reading on the spring scale remains constant while a motion detector is
used to measure the instantaneous speed of the object as it is pulled. All
frictional forces for both experiments are considered to be negligible. Which of
the two experiments, if either, could be used to determine the gravitational mass
of the object?
Experiment 1 only
A student analyzes data of the motion of a planet as it orbits a star that is in deep
space. The orbit of the planet is considered to be stable and does not change
over time. The student claims, "The only experimentally measurable external
force exerted on the planet is the force due to gravity from the star." Is the
student's claim supported by the evidence? What reasoning either supports or
contradicts the student's claim?
Yes. Other external forces are exerted on the planet, but they are of negligible
magnitude.
An object is placed on a rotating disk. The amount of time it takes the object to
make one revolution around the center of the circle may be set at a known value.
Which of the following procedures could be used to make the necessary
measurements to find the coefficient of static friction between the object and the
disk's surface?
Place the object on the disk and measure the distance from the center of the disk to the
center of mass of the object by using a meterstick. Slowly increase the rate the disk
(answered_2023.)
AP Physics: Unit 3 Progress Check: MCQ Part A
Planet X has a mass of MM and a radius of RR. Planet Y has a mass of 3M3M and
a radius of 3R3R. Identical satellites orbit both planets at a distance RR above
their surfaces, as shown above. The planets are separated by such a large
distance that the gravitational forces between them are negligible.
How does the magnitude of the gravitational force FYFY exerted by Planet Y on
its satellite compare to the gravitational force FXFX exerted by Planet X on its
satellite?
FY=3/4FX
Planet X has a mass of MM and a radius of RR. Planet Y has a mass of 3M3M and
a radius of 3R3R. Identical satellites orbit both planets at a distance RR above
their surfaces, as shown above. The planets are separated by such a large
distance that the gravitational forces between them are negligible.
How does the gravitational field gXgX at the surface of Planet X compare with the
gravitational field gYgY at the surface of Planet Y?
gX=3gY
A moon orbits a planet in a nearly circular orbit of radius RR, as shown in the
figure.
Which of the following free-body diagrams could be used to analyze the forces
exerted on the moon when it is at the position indicated in the figure?
Gravity is going toward the right
A moon orbits a planet in a nearly circular orbit of radius RR, as shown in the
figure.
The moon has a mass of 1×1022 kg1×1022 kg, and the gravitational field strength
at a distance RR from the planet is 0.001 N/kg0.001 N/kg. What is the gravitational
force exerted on the moon while it is in orbit around the planet?
1×10^19 N
A moon orbits a planet in a nearly circular orbit of radius RR, as shown in the
figure.
Astronomers making careful observations of the moon's orbit discover that the
orbit is not perfectly circular, nor is it elliptical. Which of the following statements
supports this observation?
There is another celestial body that exerts a gravitational force on the moon.
Two containers of water can have their individual masses varied by adding or
removing water. The containers are initially a distance dd apart, as measured
from their centers, and are filled with water so that each has a mass MM, as
shown in Figure 1 above. The gravitational force that one container exerts on the
other is F0F0. Water is then added to one container so that its mass increases to
1.5M1.5M, and water is removed from the other container so that its mass
, decreases to 0.5M0.5M, as shown in Figure 2. What is the new gravitational force
exerted on one container by the other?
3/4F0
Satellite AA orbits a planet at a distance dd from the planet's center with a
centripetal acceleration a0a0. A second identical satellite BB orbits the same
planet at a distance 2d2d from the planet's center with centripetal acceleration
abab. What is the centripetal acceleration abab in terms of a0a0 ?
a0/4
A student must conduct two experiments so that the inertial mass and
gravitational mass of the same object can be determined. In the experiment to
find the object's gravitational mass, the student ties one end of a string around
the object with the other end tied to a spring scale so that the object can
vertically hang at rest. In the experiment to find the object's inertial mass, the
student uses a spring scale to pull the object, starting from rest, across a
horizontal surface with a constant applied force such that frictional forces are
considered to be negligible. In addition to the spring scale, the student has
access to other measuring devices commonly found in a science laboratory.
Which of the following lists the essential measuring devices the student can use
to collect the data necessary to find the object's gravitational and inertial mass?
Meterstick and timer
Two experiments are conducted are conducted to determine the mass of an
object. In Experiment 1, the object's weight is measured by using an electronic
balance once the object has been placed at rest on the balance. In Experiment 2,
the object is pulled along a horizontal surface with a spring scale such that the
force reading on the spring scale remains constant while a motion detector is
used to measure the instantaneous speed of the object as it is pulled. All
frictional forces for both experiments are considered to be negligible. Which of
the two experiments, if either, could be used to determine the gravitational mass
of the object?
Experiment 1 only
A student analyzes data of the motion of a planet as it orbits a star that is in deep
space. The orbit of the planet is considered to be stable and does not change
over time. The student claims, "The only experimentally measurable external
force exerted on the planet is the force due to gravity from the star." Is the
student's claim supported by the evidence? What reasoning either supports or
contradicts the student's claim?
Yes. Other external forces are exerted on the planet, but they are of negligible
magnitude.
An object is placed on a rotating disk. The amount of time it takes the object to
make one revolution around the center of the circle may be set at a known value.
Which of the following procedures could be used to make the necessary
measurements to find the coefficient of static friction between the object and the
disk's surface?
Place the object on the disk and measure the distance from the center of the disk to the
center of mass of the object by using a meterstick. Slowly increase the rate the disk
