Galton Board — Physics Simulator

Drop

Balls bounce off pegs with real collision physics and pile into bins, building the bell curve in real time.

Geometry

Rows of pegs 12

Peg spacing 38

Ball radius 6

Peg radius 5

Physics

Gravity 1.0

Bounciness 0.35

Friction 0.02

Drift / bias 0.00

Drop rate 18 /s

Sim speed 1.0×

Annotations

Peg labels

Theoretical curve

Normal fit to data

Ball trails

Glow

Presets

Built with Matter.js rigid-body physics. Each peg is annotated with the number of distinct left/right paths that reach it — the entries of Pascal's triangle.

Balls dropped

Mean bin

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Std dev σ

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Skew

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χ² vs ideal

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Empirical (piled balls)

Ideal binomial · p=½

Normal fit N(μ,σ)