The pendulum bob measures three feet across, weighs 900 pounds, and hangs from a 70-foot cable; each swing carries it 15 feet, taking about 10 seconds for a complete swing. 14.

This is a requested post. Clearly, I do requests. The idea here is that I am going to give all the details needed to determine the equation of motion (and then model it) for a basic pendulum ...

A Foucault pendulum is a simple device for observing the Earth's rotation. While such pendulums have been around for more than 150 years and are a staple of the modern science museum, they are ...