. A block of weight Q rests on an inclined plane and has attached to it a string that overruns a pulley
and carries a weight P at its other end as shown in Fig 6. If the coefficient of friction between the
block Q and the inclined plane is μ , find the limiting values of the ratio P/Q consistent with
equilibrium. Neglect friction in the pulley and assume that the angle of inclination α of the plane
is greater than the angle of friction ϕ=tanμ .
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