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The upper portion of an incline plane of...

The upper portion of an incline plane of inclination `alpha` is smooth and the lower portion is rough. A particle slides down from rest from the top and just comes to rest at the fool. If the ratio of the smooth length to rough length is `2 : 1` and coefficient of frection is n `tan alpha`, then write the value of n.

Text Solution

Verified by Experts

The correct Answer is:
3

`W = Delta KE`
`mg 3l sin alpha - mu mg (l cos alpha) = 0 - 0`
`mu = 3 tan alpha`
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