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**Unformatted text preview: **the three equations : ( 29 . or , ) ( ) ( k k R B A A L d R B m m m m m m R B A L d R B A g a a m m m g m g m g m + +-+ = + + = + +-(a) When ( 29 . , ) ( k R B A L d R B m m m m m g a + + + = = As the system moves, d will increase, approaching L as a limit, and thus the acceleration will approach a maximum value of . ) ( R B A R B m m m m m g a + + + = (b) For the blocks to just begin moving, , a so solve ( 29 ] [ A s L d R B m m m-+ = for d. Note that we must use static friction to find d for when the block will begin to move. Solving for d , ), ( B A s m L m m d R-= or m. .63 kg) 4 . kg) 2 ( 25 (. kg .160 m . 1 =-= d . (c) When m. 2.50 kg) 4 . kg) 2 ( 25 (. kg, 04 . kg .04 m . 1 =-= = d m R This is not a physically possible situation since . L d The blocks wont move, no matter what portion of the rope hangs over the edge....

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