A string is wrapped around a pulley of radius 0.2 m and moment of inertia 0.4 kg m2. The string is pulled with a force of 28 N. What is the magnitude of the resulting angular acceleration of the pulley?

A string is wrapped around a pulley of radius 0.2 m and moment of inertia 0.4 kg m2. The string is pulled with a force of 28 N. What is the magnitude of the resulting angular acceleration of the pulley?

Glencoe Physics: Principles and Problems, Student Edition

1st Edition

ISBN:9780078807213

Author:Paul W. Zitzewitz

Publisher:Paul W. Zitzewitz

Chapter8: Rotational Motion

Section8.2: Rotational Dynamics

Problem 29PP

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Question

Look at the picture

A string is wrapped around a pulley of radius .2 m and moment of inertia 0.4 kg m2. The string is pulled with a
force of 28 N. What is the magnitude of the resulting angular acceleration of the pulley?
5.6 rad/s?
56 rad/s?
O 11.2 rad/s2
O 14.0 rad/s?

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