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A block of mass 2kg falls along a plane...

A block of mass 2kg falls along a plane of inclination `60^@` . Coefficient of friction between the block and the plane `=sqrt(3/2)`. What force is to be applied on the block so that it
slides down
(ii) moves up , without any acceleration ? If the velocity of the block in both cases is the same, find the ratio of the effective powers.

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Verified by Experts

The correct Answer is:
4.97 N, 28.98 N; `(sqrt(2)-1)/(sqrt(2)+1)`
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