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Questions  

A pulling force making an angle θ with the horizontal is applied on a block of weight W placed on a horizontal table. If the angle of friction is ϕ , the magnitude of the force required to move the body is equal to

a
WCos⁡ϕCos⁡(θ−ϕ)
b
Wsin⁡ϕCos⁡(θ−ϕ)
c
WTan⁡ϕSin⁡(θ−ϕ)
d
WSin⁡ϕTan⁡(θ−ϕ)

detailed solution

Correct option is B

N+Psin⁡θ=mg,f=μkN

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