# Projection of UCM on diameter is a SHM

- Author:
- Salahuddin Shaikh, Dr Adrian Jannetta

This applet shows that the Projection of UCM on any diameter of a circle is an example of Linear SHM

The points and are projections of the point

*P*in the*x*and*y*directions respectively. Those points move with simple harmonic motion. The acceleration equations for those points are also displayed.- Control the angular frequency / speed with values of
. - Position vector of the particle and unit vectors showing the direction of velocity and acceleration can be toggled.
- The phase angle can be adjusted (in radians or use degrees with the alt-O keys....so 45 alt-O for
).