Do I need to install anything?

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

For Hobbyists & Makers · Particle / N-Body

Particle / N-Body for a yo-yo

Built for hobbyists & makers exploring it for fun. Play with real physics and math, no license and no setup — just open and tinker. Simulate a yo-yo live below — adjust the inputs and watch it respond, right in your browser.

Particle / N-Body StudioLive

symplectic Euler · impulse collisions

Controls

Speed1×

Presets

Particles

Pairwise gravity G

Downward gravity

Restitution

▶ Run in Python

Data Inspector

Bodies0

Kinetic energy0.00e+0

Mean speed0.0

Max speed0.0

Governing equation

F = \frac{G m _{1} m _{2}}{r ^{2}}, G = 60, N = 120

Reading this result: Moderate mutual gravity (G=60) lets the 120 bodies form loose orbiting structures instead of collapsing outright.

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 hobbyists & makers?: Yes — this version of "Particle / N-Body for a yo-yo" is framed for hobbyists & makers exploring it for fun. Play with real physics and math, no license and no setup — just open and tinker.
Do I need to install anything?: No. It runs in any modern browser, free, with no account required.