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The time taken by a body to slide down a...

The time taken by a body to slide down a rough `45^(@)` inclined plane is twice that required to slide down a smooth `45^(@)` inclined plane. The coefficient of kinetic friction between the object and rough plane is given by

A

`0.25`

B

`0.33`

C

`0.50`

D

`0.75`

Text Solution

Verified by Experts

The correct Answer is:
D
`t_(r)=sqrt((2l)/(g(sin theta-mu_(k)cos theta))),t_(s)=sqrt((2l)/(g sin theta))`
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