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A weight W can be just supported on a...

A weight W can be just supported on a rough inclined place by a force F either acting along the plane or horizontally. If ` theta ` is the angle of friction, then F/W is

A

` tan theta `

B

` sec theta `

C

` sin theta `

D

`cos theta `

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The correct Answer is:
A
Angle of friction, is the angle which the resultant of limiting friction and normal reaction makes with the normal reaction.

` therefore tan theta = (F)/ (R ) `
` or " " ( F) /(W) = tan theta `
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