A block slides down an inclined plane with an acceleration g/2 as shown in fig. Then coefficient of kinetic friction is :

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3−1

answer is B.

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Detailed Solution

mgsinθ−f=mamgsinθ−μmgcosθ=maθ=60∘a=g/2gsin60∘−cos60∘=g/232−μ12=123−1=μ

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