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A given object taken n time more time to...

A given object taken n time more time to slide down `45^(@)` rough inclined plane as it taken to slide down a perfectly smooth `45^(@)` incline The coefficient of kintic friction between the object and the incline is .

A

`1-1/n^(2)`

B

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

C

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

D

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

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The correct Answer is:
A
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