Free online science and maths tools

Drives a pendulum to show chaotic motion and phase-space plots.

Two blocks joined by springs collide with walls and each other.

Runs two double pendulums from nearly equal starts to show sensitive dependence.

Shows how contact forces keep resting rigid bodies from sinking into each other.

Simulates circles and curved objects colliding and rolling.

Simulates a stick hanging from two springs and its swinging motion.

Runs two cars on a roller coaster track and tracks energy.

Two masses on springs in a line with graphs and a phase view.

Drops a chain of linked rigid bodies and lets it swing and settle.

Shows a pendulum balanced upright by vibrating its pivot.

Simulates a moon orbiting Mars with adjustable starting conditions.

Lets you move the pivot of a pendulum and watch how motion responds.

Shows bodies pulling on each other by gravity.

Rigid body simulation of a Newtons cradle with adjustable settings.

Simulates a pendulum clock with an escapement driving the pendulum.

Shows the pendulum direction field and trajectories in phase space.

Plots the reaction force at the pivot of a swinging pendulum.

Drops blocks into a pile and watches the rigid body stacking.

Collides polygon shapes with each other in a 2D physics engine.

Simulates colliding rigid bodies with adjustable elasticity.

Applies forces to a rigid body and shows resulting motion and rotation.

Simulates a double pendulum made of two rigid rods and its chaotic motion.

Simulates a car on an editable roller coaster track with energy graphs.

Roller coaster car that can leave the track and fly as a projectile.