A smooth block is released at rest on a ...

A smooth block is released at rest on a `45^(@)` inclined and then slides a distance d. the time taken to slide is n times as much to slide on rough incline then on a smooth incline of same inclination. The coefficient of friction fo rough incline.

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A smooth block is released at rest on a 45^(@) incline and then slides a distance d . The time taken to slide is n times as much to slide on rough incline than on a smooth incline. The coefficient of friction is

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