Acceleration

$a$, $\overrightarrow{a}$

The rate at which Velocity Increases/Decreases.

Formulae

$\overrightarrow{a}=\frac{△\overrightarrow{v}}{△t}$ $\overrightarrow{a}=\frac{{\overrightarrow{v}}_2-{\overrightarrow{v}}_1}{△t}$

SI unit

$m/s^2$