Correct Answer - Option 2 : 157 rad / s
Concept:
Angular frequency is given by,
ω = 2πn
\(\omega=\frac{2\pi N}{60}\)
Where, n = speed in RPS
N is the speed in RPM
Calculation:
Given: N = 1500 RPM
Hence angular frequency will be,
\(\omega=\frac{2\pi \times1500}{60}=157\ rad/s\)