Angular velocity is 60 RPM60 \text{ RPM}60 RPM. What is the angular frequency ω\omegaω in rad/s\text{rad/s}rad/s?
2π rad/s2\pi \text{ rad/s}2π rad/s
π rad/s\pi \text{ rad/s}π rad/s
60 rad/s60 \text{ rad/s}60 rad/s
120π rad/s120\pi \text{ rad/s}120π rad/s