His first experiments involved driving a simple pendulum with a pulse motor. He discovered that the easiest way to keep the pendulum moving was to use a coil to detect when the it reached the ...

A strong permanent magnet acts as a simple pendulum, swinging back and forth while hanging from strings. A copper plate underneath the magnet can be moved up to tune the eddy current damping. Swing ...

The length of the pendulum is adjustable. For small amplitude, the motion of the pendulum as a function of time is approximately simple harmonic motion. Also, the pendulum can be used to show ...

Abstracts of the Papers Printed in the Philosophical Transactions of the Royal Society of London, Vol. 2 (1815 - 1830), pp. 329-331 (3 pages) ...

[Nicholas Rehm] works during the day at the Applied Physics Laboratory at Johns Hopkins, Maryland, so has considerable experience with a variety of UAV applications. The question arose about how ...