56_Problem CHAPTER 10

56_Problem CHAPTER 10 - PROBLEM 10.51 Denoting by s the...

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PROBLEM 10.51 Denoting by s µ the coefficient of static friction between the block attached to rod ACE and the horizontal surface, derive expressions in terms of P , , s and θ for the largest and smallest magnitudes of the force Q for which equilibrium is maintained. SOLUTION For the linkage: 0: 0 or 22 A BA x P Mx P Σ =− + = = A Then: 1 s ss P FA P µµ == = Now 2 sin A xl = 2co s A δ θδθ = and 3 cos F yl = 3s in F Virtual Work: ( ) max 0 AF UQ F x P y δδ
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