AP Physics 1 Unit 5 Progress Check A&B Questions
(Answered Correctly)
AP Physics 1 Unit 5 Progress Check A
Block X and block Y are tied together by a rope. The system containing block X
and block Y is released from rest on a ramp, as shown in the figure. Block Y has a
smaller mass than block X. Which of the following claims is correct regarding the
momentum of the system containing only block X and the system that contains
block X and block Y?
The system containing block XX is an open system, and the system of both blocks is an
open system.
An experiment is conducted in which a cart travels across a horizontal surface
and collides with a wall. Data collected from the experiment are used to create the
graph of the cart's velocity as a function of time. All frictional forces are
considered to be negligible. Which data from the graph should the student use to
determine the direction of the net force exerted on the cart and the direction of
the change in momentum of the cart from the time intervals of A to B?
The slope of the line from AA to BB, because that will provide information about the
acceleration of the cart.
During an experiment, a toy car accelerates forward for a total time of 5s. Which
of the following procedures could a student use to determine the average net
force exerted on the car during the 5s that the car accelerates?
Use a balance to determine the mass of the car. Use a motion sensor to measure the
speed of the car at a time of 0s and a time of 5s.
A cart is attached to a hanging block by a string that passes over a pulley, as
shown in the figure. The pulley has negligible friction in its axle and negligible
mass. A student must determine the change in momentum of the cart as it is
pulled across the horizontal surface from the moment the cart is released from
rest to the moment immediately before the cart collides with the pulley. Which of
the following lists the measuring devices that are needed to determine the
change in momentum of the cart?
Timer, mass balance, and meterstick
A student conducts an experiment in which a cart is pulled by a variable applied
force during a 2 s time interval. In trial 1, the student exerts the force on a cart of
mass M. In trial 2, the student exerts the force on a cart of mass 3M. In trial 3, the
student exerts the force on a cart of 5M. In which trial will the cart experience the
greatest change in momentum from 0 s to 2 s?
Trial 3
A toy car of mass 2kg travels along a horizontal surface with negligible friction at
a speed of 1.0ms. The car then collides with a vertical wall. The wall applies a
force of magnitude 20N for 0.2s on the toy car. Which of the following predicts the
motion of the toy car immediately after the collision?
, The speed of the car will remain the same, and the car will travel in the opposite
direction.
A block of mass of 10kg travels in the positive direction along a surface with
negligible friction. The block has an initial momentum 18kg⋅ms. The block
collides with an object of an unknown mass that is at rest. The force exerted on
the block as a function of time is shown on the graph. Which of the following best
predicts the speed and direction of the block immediately after the collision?
speed decreases direction same
Block X travels towards Block Y that is initially at rest, as shown in the figure, and
eventually collides with Block Y. Which of the following diagrams represents the
final velocities for Block X and Block Y after the collision if the collision is
elastic?
x= 2.4 m/s y= 6.4 m/s
Astronaut X of mass 50kg floats next to Astronaut Y of mass 100kg while in
space, as shown in the figure. The positive direction is shown. Astronaut X
applies a force against Astronaut Y such that the kinetic energy of each astronaut
as a function of time is shown in the graph. What is the change in momentum of
the two-astronaut system and the change in momentum of each astronaut from
immediately before the force was applied to immediately after the force was
applied?
Change in Momentum of the System (kg⋅m/s)
0
Change in Momentum of Astronaut X (kg⋅m/s)(kg⋅m/s)
-100
Change in Momentum of Astronaut Y (kg⋅m/s)(kg⋅m/s)
100
A force is applied to a 2kg object, and measurements of the force as a function of
time are shown. The force is the only force exerted on the object and is applied in
the direction of the object's velocity. Which of the following could represent the
initial velocity, v0, and the final velocity, vf, of the object?
v0=4 vf=6
A 9000kg rock slides on a horizontal surface with negligible friction at 3m/s
toward a 3000kg rock that is at rest, as shown in Figure 1. A collision occurs such
that the two rocks remain stuck together and travel with a common final speed
vf , as shown in Figure 2. What is the speed vf of the two-object system after the
collision?
2.25 m/s
A student performs several experiments in which two carts collide as they travel
along a horizontal surface. Cart X and Cart Y both have a mass of 1kg. Data
collected from the three experiments are shown in the table. During which
experiment does the center of mass of the system of two carts have the greatest
change in its momentum?
All experiments have the same change in momentum for the center of mass of the
system of two carts.
A mass M1 slides along a horizontal surface and collides with and sticks to a
mass M2 that is initially at rest at the bottom of a ramp, as shown in Figure 1.
(Answered Correctly)
AP Physics 1 Unit 5 Progress Check A
Block X and block Y are tied together by a rope. The system containing block X
and block Y is released from rest on a ramp, as shown in the figure. Block Y has a
smaller mass than block X. Which of the following claims is correct regarding the
momentum of the system containing only block X and the system that contains
block X and block Y?
The system containing block XX is an open system, and the system of both blocks is an
open system.
An experiment is conducted in which a cart travels across a horizontal surface
and collides with a wall. Data collected from the experiment are used to create the
graph of the cart's velocity as a function of time. All frictional forces are
considered to be negligible. Which data from the graph should the student use to
determine the direction of the net force exerted on the cart and the direction of
the change in momentum of the cart from the time intervals of A to B?
The slope of the line from AA to BB, because that will provide information about the
acceleration of the cart.
During an experiment, a toy car accelerates forward for a total time of 5s. Which
of the following procedures could a student use to determine the average net
force exerted on the car during the 5s that the car accelerates?
Use a balance to determine the mass of the car. Use a motion sensor to measure the
speed of the car at a time of 0s and a time of 5s.
A cart is attached to a hanging block by a string that passes over a pulley, as
shown in the figure. The pulley has negligible friction in its axle and negligible
mass. A student must determine the change in momentum of the cart as it is
pulled across the horizontal surface from the moment the cart is released from
rest to the moment immediately before the cart collides with the pulley. Which of
the following lists the measuring devices that are needed to determine the
change in momentum of the cart?
Timer, mass balance, and meterstick
A student conducts an experiment in which a cart is pulled by a variable applied
force during a 2 s time interval. In trial 1, the student exerts the force on a cart of
mass M. In trial 2, the student exerts the force on a cart of mass 3M. In trial 3, the
student exerts the force on a cart of 5M. In which trial will the cart experience the
greatest change in momentum from 0 s to 2 s?
Trial 3
A toy car of mass 2kg travels along a horizontal surface with negligible friction at
a speed of 1.0ms. The car then collides with a vertical wall. The wall applies a
force of magnitude 20N for 0.2s on the toy car. Which of the following predicts the
motion of the toy car immediately after the collision?
, The speed of the car will remain the same, and the car will travel in the opposite
direction.
A block of mass of 10kg travels in the positive direction along a surface with
negligible friction. The block has an initial momentum 18kg⋅ms. The block
collides with an object of an unknown mass that is at rest. The force exerted on
the block as a function of time is shown on the graph. Which of the following best
predicts the speed and direction of the block immediately after the collision?
speed decreases direction same
Block X travels towards Block Y that is initially at rest, as shown in the figure, and
eventually collides with Block Y. Which of the following diagrams represents the
final velocities for Block X and Block Y after the collision if the collision is
elastic?
x= 2.4 m/s y= 6.4 m/s
Astronaut X of mass 50kg floats next to Astronaut Y of mass 100kg while in
space, as shown in the figure. The positive direction is shown. Astronaut X
applies a force against Astronaut Y such that the kinetic energy of each astronaut
as a function of time is shown in the graph. What is the change in momentum of
the two-astronaut system and the change in momentum of each astronaut from
immediately before the force was applied to immediately after the force was
applied?
Change in Momentum of the System (kg⋅m/s)
0
Change in Momentum of Astronaut X (kg⋅m/s)(kg⋅m/s)
-100
Change in Momentum of Astronaut Y (kg⋅m/s)(kg⋅m/s)
100
A force is applied to a 2kg object, and measurements of the force as a function of
time are shown. The force is the only force exerted on the object and is applied in
the direction of the object's velocity. Which of the following could represent the
initial velocity, v0, and the final velocity, vf, of the object?
v0=4 vf=6
A 9000kg rock slides on a horizontal surface with negligible friction at 3m/s
toward a 3000kg rock that is at rest, as shown in Figure 1. A collision occurs such
that the two rocks remain stuck together and travel with a common final speed
vf , as shown in Figure 2. What is the speed vf of the two-object system after the
collision?
2.25 m/s
A student performs several experiments in which two carts collide as they travel
along a horizontal surface. Cart X and Cart Y both have a mass of 1kg. Data
collected from the three experiments are shown in the table. During which
experiment does the center of mass of the system of two carts have the greatest
change in its momentum?
All experiments have the same change in momentum for the center of mass of the
system of two carts.
A mass M1 slides along a horizontal surface and collides with and sticks to a
mass M2 that is initially at rest at the bottom of a ramp, as shown in Figure 1.
