And what of w what's the units

The unit for $\omega$ (omega), which represents angular velocity, is radians per second (rad/s).

This unit comes directly from its definition:

$$\omega = \frac{\Delta \theta}{\Delta t}$$

where $\Delta \theta$ is the angular displacement (measured in radians) and $\Delta t$ is the time interval (measured in seconds).

Therefore, the unit of angular velocity is $\frac{\text{radians}}{\text{seconds}}$, or $\boxed{\text{rad/s}}$.