A double pendulum is a pendulum with another pendulum attached to its end, and is a simple physical system that exhibits rich dynamic behavior. The motion of a double pendulum is governed by a set of coupled partial differential equations (i.e., very complicated formulas) that can be found in the corresponding ScienceWorld article (http://scienceworld.wolfram.com/physics/DoublePendulum.html). The double pendulum relates to:

• Physics
• Chaos theory
• Dynamical systems

External links

• Double pendulum simulation (http://www.maths.tcd.ie/~plynch/SwingingSpring/doublependulum.html)