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A cylinder of density ? o, length l, and cross-section

Physics for Scientists and Engineers: A Strategic Approach with Modern Physics | 3rd Edition | ISBN: 9780321740908 | Authors: Randall D. Knight ISBN: 9780321740908 69

Solution for problem 73CP Chapter 15

Physics for Scientists and Engineers: A Strategic Approach with Modern Physics | 3rd Edition

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Physics for Scientists and Engineers: A Strategic Approach with Modern Physics | 3rd Edition | ISBN: 9780321740908 | Authors: Randall D. Knight

Physics for Scientists and Engineers: A Strategic Approach with Modern Physics | 3rd Edition

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Problem 73CP

Problem 73CP

A cylinder of density ρ o, length l, and cross-section area A floats in a liquid of density ρ f with its axis perpendicular to the surface. Length h of the cylinder is submerged when the cylinder floats at rest.

a. Show that h = (ρ 0 /ρ f )l.

b. Suppose the cylinder is distance y above its equilibrium position. Find an expression for (F net)y, the y -component of the net force on the cylinder. Use what you know to cancel terms and write this expression as simply as possible.

c. You should recognize your result of part b as a version of Hooke’s law. What is the “spring constant” k ?

d. If you push a floating object down and release it, it bobs up and down. So it is like a spring in the sense that it oscillates if displaced from equilibrium. Use your “spring constant” and what you know about simple harmonic motion to show that the cylinder’s oscillation period is

e. What is the oscillation period for a 100-m-tall iceberg (ρ ice = 917 kg/m3 ) in seawater?

Step-by-Step Solution:

Solution

Step 1 of 7

In this problem, we have to find an expression for , then we have to find an expression for net force, from the Hooke’s law we have to identify the spring constant, then show that the cylinder’s oscillation is period and finally find the oscillation period.

Step 2 of 7

Chapter 15, Problem 73CP is Solved
Step 3 of 7

Textbook: Physics for Scientists and Engineers: A Strategic Approach with Modern Physics
Edition: 3
Author: Randall D. Knight
ISBN: 9780321740908

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A cylinder of density ? o, length l, and cross-section