Phenomena modelled
Physics
Motion, forces, waves, and interacting particles.
Pendulums, springs, waves and gases, stepped forward in time so you can watch the equations move.
Models 4
4 models in this collection.
Physics & patternsDouble Pendulum
How long do two double pendulums started 0.1° apart swing together?Two double pendulums start with their upper arms 0.1° apart. Their lower bobs move together for about 7 simulated seconds, then separate completely.
Physics & patternsSpring Chain
How long does a tug on the middle bead take to reach the pinned ends?Eleven beads on ten springs, both ends pinned. The center bead starts 5 units up; its pull reaches the beads beside the ends after about 40 ticks, and the chain keeps swinging.
Physics & patternsWaves
What pattern do the ripples make once they bounce off the edges and cross the outgoing ones?Each patch accelerates toward the average height of its 4 neighbors while the center patch is moved up and down in a sine wave. Rings spread, reflect off the edges and interfere.
Physics & patternsLattice Gas
Why does the burst follow the grid lines in thin gas but spread as a ring in thick gas?The HPP lattice gas. Particles move in four directions and head-on pairs turn 90°. A packed disc spreads mainly along the grid lines in thin gas and as a round ring in thick gas.