To determine The depth that the nail will be driven when the moving hammer hits it with twice the speed and thrice the speed. Explanation a) 1. According to work energy theorem, change in kinetic energy is equal to the work done by the object. 2. KE of an object is directly proportional to the square of the velocity. 3. Let the hammer first strike the nail with initial speed V. The final speed of hammer is zero. Therefore, the work done is equal to 1 2 × m v 2 . This work drives the nail up to a certain distance into the wall. 4. When the velocity is doubled, its kinetic energy increases four times. 5. This time the nail will be driven to a distance 4 times the original

12th Edition

ISBN: 9780321909107

Author: Paul G. Hewitt

Publisher: PEARSON

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Chapter 7, Problem 72RCQ

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The depth that the nail will be driven when the moving hammer hits it with twice the speed and thrice the speed.

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Chapter 7, Problem 71RCQ

Chapter 7, Problem 73RCQ

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Chapter 7 Solutions

Conceptual Physics (12th Edition)

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