problem09_85

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

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9.85: In descending a distance d, gravity has done work gd m B and friction has done work , K gd m A μ - and so the total kinetic energy of the system is ( 29 . K A B m μ m gd - In terms of the speed v of the blocks, the kinetic energy is ( 29 ( 29 , 2 1 2 1 2 1 2 2 2 2 v R I m m I v m m K B A B A + + = + + = ϖ where
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Unformatted text preview: , R v = and condition that the rope not slip, have been used. Setting the kinetic energy equal to the work done and solving for the speed v , ( 29 ( 29 . 2 2 k R I m m m m gd v B A A B + +-=...
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