Energy of motion: for a body of mass \(m\), \[E_{\text{k}}=\frac{m\ v^{2}}{2}\] where \(v\) is the speed.
Sources: Green Book, 2nd ed., p. 12 [Terms] [Book] PAC, 1996, 68, 957. (Glossary of terms in quantities and units in Clinical Chemistry (IUPAC-IFCC Recommendations 1996)) on page 978 [Terms] [Paper]