A 2 kg brick begins to slide over a surface which is inclined at an angle of 4 5 ∘ with respect to horizontal axis. The co-efficient of static friction between their surfaces is:

Question

A 2 kg brick begins to slide over a surface which is inclined at an angle of 4 5 ∘ with respect to horizontal axis. The co-efficient of static friction between their surfaces is:, 1.7, 3 ​ 1 ​, 0.5, 1

MARKS App · Accepted Answer

​ mg sin 45 = f L ​ mg cos 45 = N f L ​ = μ s ​ N μ s ​ = tan 45 = 1 ​ or tan θ = μ s ​ ( θ is angle of repose) tan 45 = μ s ​ = 1

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