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Q.

The time taken by an object to slide down 600 rough inclined plane is n times as it takes to slide down a perfectly smooth 600 inclined plane. The coefficient of kinetic friction b/w the object and the inclined plane is

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a

13(1-n2)

b

3(n2-1n)

c

3(1-1n2)

d

11-n2

answer is B.

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Detailed Solution

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μ=tanθ(1-1n2)= tan600(1-1n2)=3(1-1n2)

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