10th Edition

ISBN: 9780321902788

Author: Hugh D. Young, Philip W. Adams, Raymond Joseph Chastain

Publisher: PEARSON

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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 60GP

The forces on the foot. A 750 N athlete standing on one foot on a very smooth gym floor lifts his body by pivoting his foot upward through a 30.0° angle, balancing all of his weight on the ball of the foot. The forces on the foot bones from the rest of his body are due to the Achilles tendon and the ankle joint. (See Figure 10.74.) The Achilles tendon acts perpendicular to a line through the heel and toes; it is this line that has rotated upward through 30.0°. Assume that the weight of the foot is negligible compared with that of the rest of the body, and begin by making a free-body diagram of the foot. (a) What are the magnitude and direction of the force that the floor exerts on the athlete's foot? (b) What is the tension in the Achilles tendon? (c) Find the horizontal and vertical components of the force that the ankle joint exerts on the foot. Then use these components to find the magnitude of this force.

Figure 10.74

Problem 60.

Chapter 10, Problem 60GP, The forces on the foot. A 750 N athlete standing on one foot on a very smooth gym floor lifts his

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Chapter 10, Problem 59GP

Chapter 10, Problem 61GP

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Chapter 10 Solutions

College Physics (10th Edition)

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