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A block of mass m lying on a rough horiz...

A block of mass m lying on a rough horizontal plane is acted upon by a horizontal force P and another force Q inclined at an angle `theta` to the vertical. The block will remain in equilibrium if the coefficient of friction between it and the surface is

A

`((P + Q sin theta))/((mg + Q cos theta))`

B

`(P cos theta + Q)/(mg - Q sin theta))`

C

`((P + Q cos theta)/(mg + Q sin theta))`

D

`((P sin theta -Q)/(mg - Q cos theta))`

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The correct Answer is:
A
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