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A block slides down an inclined plane wi...

A block slides down an inclined plane with an acceleration half the acceleration due to gravity when its inclination is `60^(@)` with the horizontal. What is the coefficient of friction (kinetic) between the block and the surface of plane ?

A

`sqrt(3)`

B

`(sqrt(3)-1)`

C

`(1)/(sqrt(3))`

D

`(1-(1)/(sqrt(3)))`

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