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The force required to move a body up a r...

The force required to move a body up a rough inclined plane is double the force required to prevent the body from sliding down the plane. The coefficient of friction when the angle of inclination of the plane is `60^(@)` is

A

`(1)/(sqrt2)`

B

`(1)/(sqrt3)`

C

`(1)/(2)`

D

`(1)/(3)`

Text Solution

Verified by Experts

The correct Answer is:
B
`F_("Up")=mg(sintheta +mu_(k)cos theta)`,
`F_("down")=mg(sin theta-mu_(k)cos theta)`.
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