This student activity uses a Java applet to show the relationship between simple harmonic motion and constant velocity circular motion. The applet features three parts: 1) A particle undergoing circular motion at a constant rate; 2) The same particle on a vertical spring; and 3) A graph that plots the time evolution of the system, resulting in a sine wave.  The activity is accompanied by a question set designed to probe student understanding. It may be performed independently as a homework assignment.

This is part of a larger collection of applet-based learning activities and homework assignments, designed to give student interactive support in understanding physics concepts.