# When a body of mass M slides down an inclined plane of inclination θ, having coefficient of friction μ through a distance s, the work done against friction is

Q: When a body of mass M slides down an inclined plane of inclination θ , having coefficient of friction μ through a distance s , the work done against friction is

(A)μ Mg cosθ s
(B)μ Mg sinθ s
(C)Mg (μ cosθ – sin θ)s
(D)None of the above

Solution : Work done against friction
= – work done by friction
= Mg cos θ s

## Author: Rajesh Jha

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