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A smooth block is released at rest on a ...

A smooth block is released at rest on a `45^(@)` incline and then slides a distance `d`. The time taken to slide is n times as much to slide on rough incline than on a smooth incline. The coefficient of friction is

A

`mu_(s)=1-(1)/(n^(2))`

B

`mu_(k)=sqrt(1-(1)/(n^(2)))`

C

`mu_(s)=1-(1)/(n^(2))`

D

`mu_(s)= sqrt(1-(1)/(n^(2)))`

Text Solution

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The correct Answer is:
A
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