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A wheel of radius 6 cm is mounted so as ...

A wheel of radius `6 cm` is mounted so as to rotate about a horizontal axis through its centre. A string of negligibe mass wrapped round its circumference carries a mass of `0.2 kg` attrached to its free end. When let fall, the mass descends through `1 m` in `5 s`. Calculate the angular acceleration of the wheel, its moment of inertia and tension in the cord.

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