A box of mass 8 kg placed on a rough in...

A box of mass `8 kg ` placed on a rough inclined plane of inclened `theta` its downward motion can be prevented by applying an upward pull `F` and it can be made to slide upward appliying a force `2F` .The coefficient of friction between the box and the inclined plane is

`2/sqrt3`

`sqrt3/2`

`1/sqrt2`

`1/2`

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Verified by Experts

The correct Answer is:

`F_(1)=mg(sin theta-mu_(k) cos theta)`
`F_(2)=mg(sin theta+mu_(k) cos theta)`

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