Triple Pendulum vs PlayMagnet

The motion of a triple pendulum is governed by a set of coupled ordinary differential equations. For certain energies its motion is chaotic. This application solves these differential equations using the Runge-Kutta method for the time stepping. You can influence the movement of the pendulum by holding your device in different positions.

PlayMagnet allows students of all ages to play with magnets on the screen. The program has six different disc magnets the user can drop anywhere on the screen. The program instantly draws the magnetic around the magnets the user has dropped on the screen with the mouse. It's made for people of all ages. The program is very simple with only eight buttons at the bottom of the screen. There are three buttons that allow you to pick different magnet discs, an undo button to remove the last disc added, a text button to input coordinates instead of clicking on the screen. It also has a save button to save the screen and a clear button to clear the screen. If you pinch the screen, it has a zoom mode. There's an easter egg if you hold down the clear button.