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Rotational Dynamics

  • G1-11 COMPARISON OF SHM AND UCM

    G1-11
    Demonstrates the relationship between simple harmonic motion and uniform circular motion.
    Turning a crank on the rear of the apparatus causes the center ball to move in circular motion around a 30cm diameter orbit, while the ball on top executes simple harmonic motion. It can be seen that SHM is the projection of UCM. This device can also be used to discuss the concept of degrees of motion in SHM by comparison with the reference circle.

  • G1-12: PENDULUM AND ROTATING BALL

    G1-12
    Demonstrate that simple harmonic motion is the projection of uniform circular motion.
    A ball rotates on a phonograph turntable below a physical pendulum with a ball on its end. The device is shadow projected on a white screen using a bright point light source. The pendulum is set to the same period as the turntable, so when the pendulum is started in the correct phase, the projection of the rotating ball moves along with the projection of the pendulum.
    FS2

  • G3-20: WAVE APPARATUS

    G3-20
    Demonstrate transverse and longitudinal wave motion.
    A number of eccentric disks support a series of metal rods, and when the handle is turned, transverse waves are created. Longitudinal waves are obtained with bent rods running in a metal guide on a metal base. Turn the handle gently. Too hard and the rods might bend.
    G3

  • J5-30: OMEGA LEVITRON

    J5-30
    Show an interesting demonstration of magnetism.
    The Levitron floats in mid-air by the forces exerted by two opposed permanent magnets. Once set in motion, it's stabilized in space through the gyroscopic effect that the spinning produces, and will stay levitated for a minute or more (if you're lucky).