A wheel having moment of inertia \( 2 \mathrm{~kg}-\mathrm{m}^{2} \...

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A wheel having moment of inertia \( 2 \mathrm{~kg}-\mathrm{m}^{2} \) about its vertical axis, rotates at the rate of \( 60 \mathrm{rpm} \) about
\( \mathrm{P} \) the axis. The torque which can stop the wheel's

W rotation in one minute would be:
(1) \( \frac{\pi}{12} \mathrm{~N}-\mathrm{m} \)
(2) \( \frac{\pi}{15} \mathrm{~N}-\mathrm{m} \)
(3) \( \frac{\pi}{18} \mathrm{~N}-\mathrm{m} \)
(4) None of these
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