engineering recuitment GATE ME 2023-24 Test Series Engineering Mechanics Equilibrium and Friction Friction
A block of weight Q rests on an inclined plane and it is attached to a string that runs over a frictionless pulley to carry a block of weight P at its other end. The coefficient of friction between the block of weight Q and the inclined plane is μ. Consider the following cases:
Case I: weight Q starts moving down the inclined plane.
Case II: weight P starts falling down.
The limiting value ratio P/Q for case I and case II respectively are:
1
(sin α - μ cos α) and (sin α + μ cos α)
2
(μ sin α – cos α) and (μ sin α + cos α)
3
(sin α + μ cos α) and (sin α - μ cos α)
4
(μ sin α + cos α) and μ (sin α – cos α)