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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`
`sin 30^(@)+mu cos 30^(@)lt 1`
`(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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