Periodic motion (AQA A-Level Physics): Quizzes

$a$ proportional to $x$, opposite direction

$a = -\omega^2 x$

Maximum displacement from equilibrium

At equilibrium ($x = 0$)

When $x = A$ (at amplitude)

$v_{\text{max}} = \omega A$

$a_{\text{max}} = \omega^2 A$

Cosine or sine curve

When displacement is maximum

Between KE (at equilibrium) & PE (max disp)