problem07_65

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

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7.65: a) The magnitude of the work done by friction is the kinetic energy of the package at point B , or 2 2 1 k B mv mgL = μ , or . 392 . 0 ) m 00 . 3 )( s m 80 . 9 ( ) s m 80 . 4 )( 2 1 ( ) 2 1 ( 2 2 2 k = = = gL v B μ b) . J 832 . 0 ) m 60 . 1 )( s m 80 . 9 )( kg 200 . 0 ( ) s m 80 . 4 )( kg 200 . 0 ( 2 2 2 1 other - = - = - = A B U K W Equivalently, since
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Unformatted text preview: , = + + = = BC AB A B A W W U K K , or . J 832 . )) m 00 . 3 )( 300 . ( ) m 60 . 1 ( (-=---=--= mg W U W BC A AB...
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