A block of mass m is kept on an inclined plane of a lift moving down with an acceleration of 2 m s - 2 . What should be the coefficient of friction for the block to move down with constant velocity relative to lift? The angle of inclination of the wedge is 30 ° . g = 10 m s - 2

Question

A block of mass m is kept on an inclined plane of a lift moving down with an acceleration of 2 m s - 2 . What should be the coefficient of friction for the block to move down with constant velocity relative to lift? The angle of inclination of the wedge is 30 ° . g = 10 m s - 2, μ = 1 3, μ = 0 . 4, μ = 0 . 8, μ = 0 . 5

MARKS App · Accepted Answer

g eff = g - 2 = 8 m s - 2 m 8 sin 30 o = μ . m 8 cos 30 o ⇒ μ = tan 30 o ⇒ m g - a sin θ = μ m g - a cos θ ⇒ μ = tan θ = tan 3 0 o = 1 3

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