FrictionMedium
Question
Figure shows a block kept on a rough inclined plane. The maximum external force down the incline for which the block remains at rest is 2N while the maximum external force up the incline for which the block is at rest is 10 N. The coefficient of static friction μ is
Options
A.
B.
C.√3
D.
Solution
When block is about to slide down 2 + mg sin θ = μ mg cos θ ....(1)
when block is about to slide up mg sin θ + μ mg cos θ = 10 ....(2) from (1) and (2) μ =
when block is about to slide up mg sin θ + μ mg cos θ = 10 ....(2) from (1) and (2) μ =
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