\begin{definition}[Definition:Simple Harmonic Motion/Period]
Consider a physical system $S$ in a state of simple harmonic motion:
:$x = A \map \sin {\omega t + \phi}$
The '''period''' $T$ of the motion of $S$ is the time required for one complete cycle:
:$T = \dfrac {2 \pi} \omega$
\end{definition}