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Questions  

 A block of mass m slides down an inclined plane which makes an angle θ with the horizontal. The coefficient of friction between the block and the plane is μ . The force exerted by the block on the plane is

a
mg cos θ
b
μ2+1.mgcosθ
c
μ mg cos θμ2+1
d
μ mg cos θ

detailed solution

Correct option is B

fk= μ mg cos θ,   N = mg cos θ,    R = fk2+N2

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