problem06_57

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

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6.57: a) J 532 m) (3.80 N) 140 ( = b) J 315 ) 25 sin ( m) (3.80 ) s m (9.80 kg) 0 . 20 ( 2 - = ° - c) The normal force does no work. d) J 203 25 cos m) (3.80 ) s m (9.80 kg) (20.0 ) 30 . 0 ( cos 2 k k k - = ° - = - = - = - = θ mgs μ ns μ s f W f e) J 15 J 203 J 315 J 532 = - - (14.7 J to three figures).
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Unformatted text preview: f) The result of part (e) is the kinetic energy at the top of the ramp, so the speed is . s m 21 . 1 kg) (20.0 J) 7 . 14 ( 2 2 = = = m K v...
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