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A given object takes n times as much tim...

A given object takes n times as much time to slido down a `45^(@)` rough inclined plane as it takes to slide down a perfectly smooth `45^(@)` inclined plane. The coefficient of kinetic friction between the object and the inclined plane is given by:

A

`sqrt(1-(1)/(n^(2)))`

B

`sqrt((1)/(1-n^(2)))`

C

`1+(1)/(n^(2))`

D

`1-(1)/(n^(2))`

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The correct Answer is:
D
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