PROBLEM 10.51 Denoting by sµthe coefficient of static friction between the block attached to rod ACEand the horizontal surface, derive expressions in terms of P, ,sand θfor the largest and smallest magnitudes of the force Qfor which equilibrium is maintained. SOLUTIONFor the linkage: 0:0or22ABAxPMxPΣ=−+==AThen: 1sssPFAPµµ===Now 2 sinAxl=2cosAδθδθ=and 3 cosFyl=3sinFVirtual Work: ( )max0AFUQFxPyδδ
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