Question

The angular speed of a flywheel making 120 rev/min is A) 2 π rad/s B) 4 π square rad/s C) π rad/s D) 4 π rad/s

Answer 1

$$\begin{gathered} Dearstudent, \\ angularspeed=2\mathrm{\pi f} \\ \mathrm{f}=\frac{120}{60}=2\mathrm{rev}/\sec \\ \mathrm{angular}\mathrm{speed}=2\mathrm{\pi }\times 2=4\mathrm{\pi rad}/\sec \\ \mathrm{Regards} \end{gathered}$$