MechWorld

Interactive simulation of a system of springs and masses.

Instructions are given below. If it doesn't work you may need to update your Java plugin.

Instructions

Pick an object type (initially none is selected). Unconstrained masses are green. Constrained masses are red. Click on an unconstrained mass to constrain it. Drag a constrained mass to move it around and to introduce energy into the system. Double click a constrained mass to unconstrain it.