To use this demonstration, you must download and install the Mathematica Viewer from the Wolfram Demonstrations Project. The demonstration illustrates the motion of a mass on a spring. When the mass is pulled down, the spring exerts a restoring force described by Hooke's Law that pulls the mass upwards. The result is that the mass travels up and down in simple harmonic motion, where the displacement of the mass is described by a sinusoidal curve. Think of this demonstration as an experiment to verify (or not) the effect of Hooke's Law on the period of oscillation. Use this worksheet as your guide in working with this demonstration.