problem06_22

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

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6.22: a) If there is no work done by friction, the final kinetic energy is the work done by the applied force, and solving for the speed, . s / m 48 . 4 ) kg 30 . 4 ( ) m 20 . 1 )( N 0 . 36 ( 2 2 2 = = = = m Fs m W v b) The net work is s mg F s f Fs ) ( k k μ - = - , so ) kg 30 . 4 ( ) m 20 . 1 ))( s / m 80 . 9 )( kg 30 . 4 )( 30 . 0 ( N 0 . 36 ( 2 ) ( 2 2 k
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Unformatted text preview: -= m s mg F v s. / m 61 . 3 = (Note that even though the coefficient of friction is known to only two places, the difference of the forces is still known to three places.)...
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