A wheel of radius \( 6 \mathrm{~cm} \) is mounted so as to rotate about a horizontal axis throug...

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