problem06_23

University Physics with Modern Physics with Mastering Physics (11th Edition)

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6.23: a) On the way up, gravity is opposed to the direction of motion, and so J 4 . 28 ) m 0 . 20 )( s / m 80 . 9 )( kg 145 . 0 ( 2 - = - = - = mgs W . b) s / m 26 . 15 ) kg 145 . 0 ( ) J 4 . 28 ( 2 ) s / m 0 . 25 ( 2 2 2 1 2 = - + = + = m W v v . c) No; in the absence of air resistance, the ball will have the same speed on the way
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Unformatted text preview: down as on the way up. On the way down, gravity will have done both negative and positive work on the ball, but the net work will be the same....
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This document was uploaded on 02/04/2008.

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