AP PHSICS 1 : UNIT 5 PROGRESS

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AP PHSICS 1 : UNIT 5 PROGRESS

CHECK MCQ PART A QUESTIONS

AND CORRECT SOLUTIONS

2024/2025 GRADED A+.

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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?: 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 aver- age 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
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