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A stone of mass \( 4 \mathrm{~kg} \) is whirled in a horizontal circle of radius \( 1 \mathrm{~m} \) and makes \( 2 \mathrm{rev} / \mathrm{sec} \). The moment of inertia of the stone about the axis of rotation is
(1) \( 64 \mathrm{~kg} \times \mathrm{m}^{2} \)
(2) \( 4 \mathrm{~kg} \times \mathrm{m}^{2} \)
(3) \( 16 \mathrm{~kg} \times \mathrm{m}^{2} \)
(4) \( 1 \mathrm{~kg} \times \mathrm{m}^{2} \)
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