Home▸Physics & Mechanics▸Bouncing Balls Physics: Momentum (2D)

🧪 Bouncing Balls Physics: Momentum (2D)

A flat Canvas 2D ball-pit built around true mass-weighted elastic collisions: every ball-ball impact conserves total momentum exactly, with live sliders for gravity, wall restitution, collision elasticity and ball count.

Physics & Mechanics2DEasy60 FPS📱 Mobile-adapted⇄ 3D version

This 2D companion strips the 3D ball-pit down to a flat Canvas view built to make momentum conservation legible: every disk carries a mass proportional to its area, ball-ball impacts are resolved with the full impulse-based elastic-collision formula along the contact normal, and a live readout tracks total kinetic energy, total system momentum and the collision rate so the effect of the elasticity and gravity sliders is directly visible instead of implied by a rotating camera.

⚙ Under the hood

2D Canvas ball-pit with mass-proportional (m = k·r²) disks, gravity, independent wall restitution, and impulse-based elastic ball-ball collisions that conserve total system momentum on every impact.

momentum conservationelastic collisionsrestitutionimpulserigid body physics

2D · HTML5 Canvas 2D · 60 FPS target · runs fully client-side, no install