Double pendulum
Release two nearly identical pendulums and watch their paths separate.
Δθ = 0.001 rad
Drag either bob and release. The solid and dashed pendulums start 0.001 radians apart at the upper joint. Use arrow keys to move the cursor, then Enter to act.
Equal point masses, unit massless rods, no friction. The trajectories are numerical approximations. myPhysicsLab · Double Pendulum