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A uniform, solid disk with mass m and radius R is pivoted

University Physics | 13th Edition | ISBN: 9780321675460 | Authors: Hugh D. Young, Roger A. Freedman ISBN: 9780321675460 31

Solution for problem 78P Chapter 9

University Physics | 13th Edition

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University Physics | 13th Edition | ISBN: 9780321675460 | Authors: Hugh D. Young, Roger A. Freedman

University Physics | 13th Edition

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Problem 78P

A uniform, solid disk with mass ?m? and radius ?R? is pivoted about a horizontal axis through its center. A small object of the same mass ?m? is glued to the rim of the disk. If the disk is released from rest with the small object at the end of a horizontal radius, find the angular speed when the small object is directly below the axis.

Step-by-Step Solution:
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Solution 78P This question can be solved by using the principle of conservation of energy. Total initial mechanical energy of the system is equal to the total final mechanical energy. The disk is released from rest, hence initial kinetic energy is zero. Initial potential energy = mgR, where R is given to be the radius of the disk. Initial total mechanical energy = mgR…..(1) Let the angular speed be . 2 So, kinetic energy = I2 , I is the moment...

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Chapter 9, Problem 78P is Solved
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Textbook: University Physics
Edition: 13
Author: Hugh D. Young, Roger A. Freedman
ISBN: 9780321675460

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A uniform, solid disk with mass m and radius R is pivoted

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