Editing Acceleration (section)

===Average acceleration===

[[File:Acceleration as derivative of velocity along trajectory.svg|right|thumb|Acceleration is the rate of change of velocity. At any point on a trajectory, the magnitude of the acceleration is given by the rate of change of velocity in both magnitude and direction at that point. The true acceleration at time {{mvar|t}} is found in the limit as [[time interval]] {{math|Δ''t'' → 0}} of {{math|Δ'''v'''/Δ''t''}}.]]

An object's average acceleration over a period of [[time in physics|time]] is its change in [[velocity]], <math>\Delta \mathbf{v}</math>, divided by the duration of the period, <math>\Delta t</math>. Mathematically,
<math display="block">\bar{\mathbf{a}} = \frac{\Delta \mathbf{v}}{\Delta t}.</math>