radian per second squared

SI coherent derived unit whose name and symbol includes an SI coherent derived unit with a special name and symbol

Name	Symbol	Quantity	Base units
radian per second squared	rad/s²	angular acceleration	s⁻²
The radian per second squared, symbol rad/s², is the SI coherent derived unit of angular acceleration.
Definition			Δν_Cs²
$1 \mspace{4mu} \text{rad} / \text{s}^2 \mspace{6mu} = \dfrac{1}{(9 \mspace{4mu} 192 \mspace{4mu} 631 \mspace{4mu} 770)^2} \mspace{6mu} {\Delta \nu _{Cs}}^2\\ \\ \\ 1 \mspace{4mu} \text{rad} / \text{s}^2 \mspace{6mu} \approx 1.183 \mspace{4mu} 369 \mspace{4mu} 229 \mspace{4mu} 068 \mspace{4mu} 626 \mspace{4mu} 734 \times10^{-20} \mspace{6mu} {\Delta \nu _{Cs}}^2$

A wheel of radius one metre, rolling along a surface with an angular acceleration of one radian per second squared, travels with a linear acceleration of one metre per second squared.