Use the trigger to animate the pendulum. Change the gravity, pendulum length, maximum angle, and mass to see how they affect motion, period, and energy.[more]
Note that changing the initial conditions after the trigger has been hit will change the entire history of the pendulum's evolution.[less]
In this Demonstration, all units are in MKS. The numerical solution is accurate and does not use the approximation of replacing by , which is only valid for small angles. Varying the mass changes the area of a disk with a physical density. Kinetic energy is not calculated directly, but from the principle of conservation of energy.
Wolfram Demonstrations Project
Published: March 7 2011