• A swinging pendulum and orbiting ball are both shown to be examples of simple harmonic motion.
  • The length of the pendulum or the RPM of the ball can be adjusted until their periods match.
  • Can be shadow projected onto a screen to make the effect more obvious.

        (use OHP to shadow project)

  • RPM can be varied with speed control knob.

        (with 45 cm pendulum, set speed to ~330 RPM )
        (explain function of RPM/rev. button)