problem07_53

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

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7.53: The net work done during the trip down the barrel is the sum of the energy stored in the spring, the (negative) work done by friction and the (negative) work done by gravity. Using , k F kx ) ( 2 2 1 2 2 1 = the performer’s kinetic energy at the top of the barrel is
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Unformatted text preview: J, 10 7.17 m) 5 . 2 )( s m kg)(9.80 (60 m) N)(4.0 40 ( m N 1100 N) 4400 ( 2 1 3 2 2 × =--= K and his speed is . s m 5 . 15 kg 60 ) J 10 17 . 7 ( 2 3 = ×...
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