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The blocks shown in the figure are connected by flexible cable passing over frictionless
pulleys. At 300-lb block, the coefficients of friction are Us = 0.30 and Uk = 0.20 while at
200-lb block are Us = 0.40 and Uk is 0.30. Compute the magnitude and direction of the
friction force acting on each block.
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200 Ib
4
3
300lb

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