Answer
$simple\ harmonic$, $|a|$, $\frac{2\pi}{\omega}$, $\frac{\omega}{2\pi}$
Work Step by Step
When a motion can be described with a simple sine or cosine model, we call the motion to be a $simple\ harmonic$ motion. With the given motion equations, we can find the amplitude as $A=|a|$, the period as $p=\frac{2\pi}{\omega}$, and the frequency $f=\frac{1}{p}=\frac{\omega}{2\pi}$. Thus the answers are: $simple\ harmonic$, $|a|$, $\frac{2\pi}{\omega}$, and $\frac{\omega}{2\pi}$.
