step

Step is an interactive physical simulator. It allows you to explore the physical world through simulations.

Features:

• Classical mechanical simulation in two dimensions;
• Particles, springs with dumping, gravitational and coulomb forces;
• Rigid bodies;
• Collision detection (currently only discrete) and handling;
• Soft (deformable) bodies simulated as user-editable particles-springs system, sound waves;
• Molecular dynamics (currently using Lennard-Jones potential):
  • gas and liquid,
  • condensation and evaporation,
  • calculation of macroscopic quantities and their variances;
• Units conversion and expression calculation;
• Errors calculation and propagation;
• Solver error estimation;
• Several different solvers;
• Controller tool to easily control properties during simulation;
• Tools to visualize results: graph, meter, tracer;
• Context information for all objects, integrated wikipedia browser;
• Collection of example experiments, more can be downloaded with KNewStuff2;
• Integrated tutorials.