radian per second

Name	Symbol	Quantity	Base units
radian per second	rad/s	angular velocity	s⁻¹
The radian per second, symbol rad/s, is the SI coherent derived unit of angular velocity.
Definition			Δν_Cs
$1 \mspace{4mu} \text{rad} / \text{s} \mspace{6mu} = \dfrac{1}{(9 \mspace{4mu} 192 \mspace{4mu} 631 \mspace{4mu} 770)} \mspace{6mu} \Delta \nu _{Cs}\\ \\ \\ 1 \mspace{4mu} \text{rad} / \text{s} \mspace{6mu} \approx 1.087 \mspace{4mu} 827 \mspace{4mu} 757 \mspace{4mu} 077 \mspace{4mu} 666 \mspace{4mu} 563 \times10^{-10} \mspace{6mu} \Delta \nu _{Cs}$

A wheel of radius one metre, rolling along a surface with an angular velocity of one radian per second, travels at a speed of one metre per second.