When a body slides down from rest along ...

When a body slides down from rest along a smooth inclined plane making anangle of `45^@` with the horizontal, it takes time T. when the same body slides down from rest along a rough inclined plane making the same angle and through the same distance, it is seen to take time pT, where p is some number greater than 1. Calculate the co-efficient of friction between the body and the rough plane.

0.33

0.25

0.75

0.8

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