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Animated Pendulum
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.
Note that changing the initial conditions after the trigger has been hit will change the entire history of the pendulum's evolution.

Show Source Code | Download Source Code Notebook

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.


"Animated Pendulum" from The Wolfram Demonstrations Project
 http://demonstrations.wolfram.com/AnimatedPendulum/
Contributed by: Joel Frederico and Rob Morris
Additional contributions by: Fernand Brunschwig
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