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On application of brakes, the velocity o...

On application of brakes, the velocity of a train decreases from 72 km .`h^(-1)` to 36 km.`h^(-1)` in 10 s, due to a constant retardation. Equilibrium of a box kept on a bunk of the train is about ot be disturbed. What is the coefficient of friction between the box and the bunk?

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The correct Answer is:
0.102
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