Story Behind the Science
Story Behind the Science: Pendulum Motion, Time, and Shape of Earth [Pdf]
Article outlining the scientific history behind the evolution of theories about measuring time based on the movement of a pendulum, and about how gravity would impact a pendulum's movement depending on one's proximity to the Earth's...
Story Behind the Science
Story Behind the Science: Pendulum Motion [Pdf]
The history of the pendulum and its importance both in timekeeping, and in how timekeeping was used to solve other problems, such as determining longitude on a map.
American Association of Physics Teachers
Com Padre Digital Library: Open Source Physics: Swinging Atwood's Machine Model
Variation on the standard Atwood's Machine model, where one hanging mass swings like a pendulum and the other remains stationary. Manipulate the conditions and observe the results.