A block kept on a rough inclined plane, as shown in the figure, remains at rest upto a maximum force 2 N down the inclined plane. The maximum external force up the inclined plane that does not move the block is 10 N . The coefficient of static friction between the block and the plane is: [Take g = 10 m / s 2 ]

Question

A block kept on a rough inclined plane, as shown in the figure, remains at rest upto a maximum force 2 N down the inclined plane. The maximum external force up the inclined plane that does not move the block is 10 N . The coefficient of static friction between the block and the plane is: [Take g = 10 m / s 2 ], 3 4, 2 3, 1 2, 3 2

MARKS App · Accepted Answer

2 + m g sin ⁡ θ = μ m g cos ⁡ θ m g sin ⁡ θ - μ m g cos ⁡ θ = 2 . . . . . . . . 1 m g sin ⁡ θ + μ m g cos ⁡ θ = 10 . . . . . . . 2 equation (1) devided by (2) m g sin ⁡ θ - μ cos ⁡ θ m g sin ⁡ θ + μ cos ⁡ θ = - 2 10 = - 1 5 1 - μ 3 5 = - 1 + μ 3 6 = 4 3 μ μ = 3 2

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