Answered: ring or disk

Glencoe Physics: Principles and Problems, Student Edition

1st Edition

ISBN:9780078807213

Author:Paul W. Zitzewitz

Publisher:Paul W. Zitzewitz

Chapter7: Gravitation

Section: Chapter Questions

Problem 1STP

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Question

Joseph, Winston, and Franklin are doing an experiment in lab that involves rotational dynamics. Using the apparatus below, Joseph places a disk with a mass of 379 g on the apparatus. Winston then hangs a 15 g mass from the pulley and releases it. The 15 g mass drops and then rises back up, then drops again. They each graph the angular velocity ω as a function of time as the hanging weight drops, rises, and drops again. Their graphs are shown below. Only one is correct. Identify the correct graph and explain why it is correct. For the incorrect graphs, explain why they are not correct.

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