A ring of mass \( 10 \mathrm{~kg} \) and diameter \( 0.4 \) meter is rotating about its geometri...

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A ring of mass \( 10 \mathrm{~kg} \) and diameter \( 0.4 \) meter is rotating about its geometrical axis at 1200 rotations per minute. Its moment of inertia and angular momentum will be respectively:-
(1) \( 0.4 \mathrm{~kg}-\mathrm{m}^{2} \) and \( 50.28 \mathrm{~J}-\mathrm{s} \)
(2) \( 0.4 \mathrm{~kg}-\mathrm{m}^{2} \) and \( 0.4 \mathrm{~J}-\mathrm{s} \)
(3) \( 50.28 \mathrm{~kg}-\mathrm{m}^{2} \) and \( 0.4 \mathrm{~J}-\mathrm{s} \)
(4) \( 0.4 \mathrm{~kg}-\mathrm{m}^{2} \) and zero
\( \mathrm{P} \)
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