Angular speed of a fly wheel making 120 revolutions/minute is

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3-2.Motion in Plane

easy

The angular speed of a fly wheel making $120$ revolutions/minute is

A$2\pi \,\,rad/s$

B$4{\pi ^2}\,\,rad/s$

C$\pi \,\,rad/s$

D$4\pi \,\,rad/s$

(AIPMT-1995)

Solution

(d)$120\,rev/\min = 120 \times \frac{{2\pi }}{{60}}rad/\sec = 4\pi \,rad/\sec $

Standard 11

Physics

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