Explanation Given information: A bowling ball is of 12 − lb . Concept Used: If a force f x acts on an object in moving it from x 1 to x 2 , then the Work-Energy theorem states that the work done is equal to the change in kinetic energy, that is W = 1 2 m v 2 2 − 1 2 m v 1 2 where, v 1 and v 2 are the velocities of the object at x 1 and x 2 respectively. Calculation: The weight of the bowling ball is 12 lb . The mass of the bowling ball is m = 12 lb 32 ft / s 2 = 3 8 slugs Initially when the ball is at rest, then it has velocity v 1 = 0 ft / s . To find the work done to hurl the ball at 20 mi / h , do as follows

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Author: Stewart

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Chapter 6.4, Problem 32E

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To find: Work required to hurl a 12−lb bowling ball at 20 mi/h .

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Chapter 6.4, Problem 31E

Chapter 6.4, Problem 33E

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Work required to hurl a 12 − lb bowling ball at 20 mi/h .

Solution Summary: The author explains how the Work-Energy theorem states that the work done is equal to the change in kinetic energy, which is W=12mv_

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To find: Work required to hurl a 12−lb bowling ball at 20 mi/h .

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Chapter 6 Solutions