A body of weight W is required to move up on rough inclined plane whose angle of inclination with the horizontal is α. The effort applied parallel to the plane is given by(where μ = tanφ = Coefficient of friction between the plane and the body.).

A) P = W tanα

B) P = W tan(α + φ)

C) P = W (sinα + μcosα)

D) P = W (cosα + μsinα)

option C is the right answer.

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