Do I need to install anything?

No. It runs in any modern browser, free, with no account required.

For Students · Random Walk

Random Walk for a Newton's cradle

Built for students learning it for a class or exam. See the concept move instead of memorizing formulas — and check your homework intuition. Simulate a Newton's cradle live below — adjust the inputs and watch it respond, right in your browser.

Random Walk & DiffusionLive

Brownian motion · √t spreading

Controls

Speed1×

Hundreds of walkers start at the center and step randomly. The cloud spreads as √(time) — the signature of diffusion.

Presets

Walkers

Step size

▶ Run in Python

Data Inspector

Walkers400

Steps0

RMS distance0.0

Law⟨r²⟩ ∝ t

Governing equation

⟨ x ⟩ = 0, ⟨ x^{2} ⟩ = d N = 20 \approx 0.0

Reading this result: With 400 walkers the RMS distance grows as √(steps) — the defining signature of diffusion.

Runs locally in your browser — free forever. Scale to the cloud when reality gets heavy.

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Frequently asked questions

Is this good for students?: Yes — this version of "Random Walk for a Newton's cradle" is framed for students learning it for a class or exam. See the concept move instead of memorizing formulas — and check your homework intuition.
Do I need to install anything?: No. It runs in any modern browser, free, with no account required.