The angular speed of a fly wheel making $120$ revolutions/minute is
The angular speed of a fly wheel making $120$ revolutions/minute is
$2\pi \,\,rad/s$
$4{\pi ^2}\,\,rad/s$
$\pi \,\,rad/s$
$4\pi \,\,rad/s$
The angular speed of a fly wheel making $120$ revolutions/minute is
$120\,rev/\min = 120 \times \frac{{2\pi }}{{60}}rad/\sec = 4\pi \,rad/\sec $
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