9th Edition

ISBN: 9781133947271

Author: Raymond A. Serway, John W. Jewett

Publisher: Cengage Learning

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Torque is the rotational equivalent of linear force in physics and mechanics. Based on the course of study, it is also known as the moment of force, rotational force, or turning effect.

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Textbook Question

Chapter 10, Problem 10.7OQ

As shown in Figure OQ10.7, a cord is wrapped onto a cylindrical reel mounted on a fixed, friction less, horizontal axle. When does the reel have a greater magnitude of angular acceleration? (a) When the cord is pulled down with a constant force of 50 N. (b) When an object of weight 50 X is hung from the cord and released, (c) The angular accelerations in parts (a) and (b) are equal, (d) It is impossible to determine.

Chapter 10, Problem 10.7OQ, As shown in Figure OQ10.7, a cord is wrapped onto a cylindrical reel mounted on a fixed, friction

Definition Definition Rate of change of angular velocity. Angular acceleration indicates how fast the angular velocity changes over time. It is a vector quantity and has both magnitude and direction. Magnitude is represented by the length of the vector and direction is represented by the right-hand thumb rule. An angular acceleration vector will be always perpendicular to the plane of rotation. Angular acceleration is generally denoted by the Greek letter α and its SI unit is rad/s 2 .

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Chapter 10 Solutions

Physics for Scientists and Engineers

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Solution Summary: The author explains that the reel have greater magnitude of angular acceleration when the cord is pulled down by a constant force.

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Chapter 10 Solutions