5th Edition

ISBN: 9780321976444

Author: James S. Walker

Publisher: PEARSON

Concept explainers

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 11, Problem 22PCE

To loosen the lid on a jar of jam 7.6 cm in diameter, a torque of 11 N · m must be applied to the circumference of the lid. If a jar wrench whose handle extends 15 cm from the center of the jar is attached to the lid, what is the minimum force required to open the jar?

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Chapter 11, Problem 21PCE

Chapter 11, Problem 23PCE

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How much torque is produced by opening a jar of pickles if the lid on the jar has a radius of 4.3 cm and the force exerted tangentially to the lid is 125 N? Assume that the force is concentrated at one point on the lid.

Spark plugs should be tightened to a specified torque of 14.55Nm. You have a wrench that is 0.21 m long, but because of the tightness of the space you can't pull the wrench at a ninety degree angle. You must pull at an angle of 25.42 degrees, measured from the handle of the wrench. What force must you exert on the wrench?

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Chapter 11 Solutions

Physics (5th Edition)

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