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A flywheel is a mechanical device specif...

A flywheel is a mechanical device specifically designed to efficiently store rotational energy. For a particular machine it is in the form of a uniform 20 kg disc of diameter 50 cm, able to rotate about its own axis. Calculate its kinetic energy when rotating at 1200 rpm. Use `pi^2 = 10`. Calculate its moment of inertia , in case it is rotated about a tangent in its plane.

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