A) \[2\pi \,\,rad/s\]
B) \[4{{\pi }^{2}}\,\,rad/s\]
C) \[\pi \,\,rad/s\]
D) \[4\pi \,\,rad/s\]
Correct Answer: D
Solution :
\[120\,rev/\min =120\times \frac{2\pi }{60}rad/\sec =4\pi \,rad/\sec \]
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