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A block is placed on a rough inclined pl...

A block is placed on a rough inclined plane of inclination `theta = 30^(@)`. If the force to drag it along the plane is to be smaller than to lift it. The coefficient of friction `mu` should be less than

Text Solution

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`mg(sin theta + mu cos theta) lt mg`
`sin30^(@) + mu cos30^(@) lt1`
`1/2 + mu sqrt(3)/2 lt 1 rArr mu sqrt(3/2) lt 1//2 rArr mu lt 1/sqrt(3)`
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