Fredrik Karlsson, 2000-2004
The Particle World is a Java Applet simulating particles connected by springs in a 2D world. The world can include gravity/electrostatic forces between particles, constant gravity/electric/magnetic fields and air resistance. It is possible to affect the simulation in real-time by grabbing the particles with the mouse or by changing the properties of the objects/environment.

Perhaps the easiest way to get a feeling of the simulator is to play with some of the predefined systems which are available in [File / Predefined] in the menubar. There you can find predefined simulations of orbits, coupled and double pendulums and a lot of other things. (See the adjoining figure.)

The status of the simulation can be switched between running and pausing by [Simulation / Pause toggle] (or simply press P). Paused simulation is convenient while constructing.

A simulation can be restarted by [Simulation / Initialize] (or simply press I).

Read more about How to Construct in The Particle World.

Try the step-by-step tutorial: What happens if the gravitation is suddenly switched off?

Predefined systems in the menubar.

A screenshot of the simulator (simulating the complicated motion of a double pendulum).

You must have Java and Java Script enabled to start the simulator.

(040103) Some new functions added:
1) Keep the M-key pressed and you can measure distances
2) You can change the color of the springs by adding a line for the spring in the config file, e.g. "Color: blue;
3) You can add explaining texts in the simulator window, by specifying the text, the coordinates and the color in the config file, e.g. 
Text number:0;
Position X:140;
Position Y:70;
Please, send your comments, suggestions or constructions to Fredrik Karlsson

You can find received constructions on the constructions page (Updated 040906).



Keywords: physics mechanics springs mass particle force gravity coupled double pendulum pendula angular momentum standing wave harmonic oscillation orbit kepler sun earth moon newton law real time simulator java applet educative fun free ideal gas thermal physics