Simple harmonic motion is actually a lot like uniform circular motion, ... At any given point along the marble's path, it'll be at a certain angle to the right-hand side of the ring.

The angular velocity w of the motion is defined in radians per second as the angle q moved through per unit time, and is related to the FREQUENCY f by the equation: w = 2pf. The displacement d, whose ...

Similarly, simple harmonic motion may be derived from the projection onto the axis of a circle of a point moving with constant speed on the circumference, as shown in the diagram below. See: Cycle, ...