h2. Defnition 
{excerpt} 
The time rate of change of position. {excerpt}

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h2. Mathematical Definition

{latex}\begin{large}\[ \vec{v} = \frac{d\vec{x}}{dt}\]\end{large}{latex}

h2. One-Dimensional Velocity

h4. Differential 
  {latex}\begin{Large} $v = \frac{dx}{dt}$\end{Large}{latex}
h4. Integral
 {latex}\begin{Large} $v = v_{\rm i}+\int_{t_{\rm i}}^{t}a\:dt$\end{Large}{latex}\\
{latex}\begin{Large}$v^{2}=v_{\rm i}^{2}+2\int_{x_{\rm i}}^{x}a\:dx$\end{Large}{latex}
h4. Graphical
  Besides explicit velocity graphs, velocity can be found from the slope of a position vs. time graph or (if the initial velocity is known) by adding the area under an acceleration vs. time graph to the initial velocity.
h4. Through Motion Diagrams
  In a motion diagram, the velocity can be estimated by looking at the spacing of the individual snapshots (assuming that the snapshots are separated by equal time intervals).

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h2. Relevant Models

 {children:page=Two-Dimensional Motion (General)|depth=all}

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h2. Relevant Examples

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