10th Edition

ISBN: 9780321902788

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

Publisher: PEARSON

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Textbook Question

Chapter 11, Problem 8P

Achilles tendon. The Achilles tendon, which connects the calf muscles to the heel, is the thickest and strongest tendon in the body. In extreme activities, such as sprinting, it can be subjected to forces as high as 13 times a person’s weight. According to one set of experiments, the average area of the Achilles tendon is 78.1 mm², its average length is 25 cm, and its average Young’s modulus is 1474 MPa. (a) How much tensile stress is required to stretch this muscle by 5.0% of its length? (b) If we model the tendon as a spring, what is its force constant? (c) If a 75 kg sprinter exerts a force of 13 times his weight on his Achilles tendon, by how much will it stretch?

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Chapter 11, Problem 7P

Chapter 11, Problem 9P

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The largest tendon in the body, the Achilles tendon, connects the calf muscle to the heel bone of the foot. This tendon is typically 12.0 cm long, 5.30 mm in diameter, and has a Young's modulus of 1.65×109 Pa .If an athlete has stretched the tendon to a length of 12.7 cm, what is the tension ? , in newtons, in the tendon? ?= N

The Achilles tendon, which connects the calf muscles to the heel, is the thickest and strongest tendon in the body. In extreme activities, such as sprinting, it can be subjected to forces as high as 15 times a person's weight. According to one set of experiments, the average area of the Achilles tendon is 77.8 mm^2, its average length is 29 cm, and its average Young's modulus is 1474 MPa. (A) How much tensile stress is required to stretch this muscle by 4.6 %% of its length? (in Pa) (B) If we model the tendon as a spring, what is its force constant? (in N/m) (C) If a 75-kgkg sprinter exerts a force of 15 times his weight on his Achilles tendon, by how much will it stretch? (in cm)

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Chapter 11 Solutions

College Physics (10th Edition)

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