# Simple Harmonic Motion and Circular Motion

Compare the motion of these two balls.

Uniform Circular Motion (radius A, angular velocity $\omega$)

Simple Harmonic Motion (amplitude A, angular frequency $\omega$)

Simple harmonic motion can be visualized as the projection of uniform circular motion onto one axis.

The phase angle $\omega t$ in SHM corresponds to the real angle $\omega t$ through which the ball has moved in circular motion.