AP Physics 1 Unit 5 Progress Check A Questions (Answered Correctly) | 2025
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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? - (answers)The system containing
block XX is an open system, and the system of both blocks is an open system.
吗？还是指某个特定的词或概念
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? -
(answers)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? - (answers)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? - (answers)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
吗？还是指某个特定的词或概念
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? -
(answers)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? - (answers)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.
LATEST UPDATED
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? - (answers)The system containing
block XX is an open system, and the system of both blocks is an open system.
吗？还是指某个特定的词或概念
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? -
(answers)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? - (answers)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? - (answers)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
吗？还是指某个特定的词或概念
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? -
(answers)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? - (answers)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.
