Do I need to install anything?

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

For Hobbyists & Makers · Gas in a Box

Gas in a Box for a playground swing

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 playground swing live below — adjust the inputs and watch it respond, right in your browser.

Gas in a Box — Kinetic TheoryLive

ideal gas · pressure from collisions

Controls

Speed1×

Pressure emerges from molecules hammering the walls. More particles or higher temperature → higher pressure, exactly as PV = nRT predicts.

Presets

Particles (n)

Temperature

▶ Run in Python

Data Inspector

Particles120

Temperature3.0

Pressure (wall)0

LawPV = nRT

Governing equation

P V = N k_{B} T, N = 120, T = 3.0

Reading this result: Pressure scales with both particle count and temperature: doubling either roughly doubles the force on the walls (P ∝ nT).

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

or unlock everything with Pro →

Also for:Students Researchers Educators Engineers K-12 Students First Responders General version →

More with Gas in a Box

Gas in a Box for a projectile from a cannon Gas in a Box for a bouncing ball Gas in a Box for a pendulum clock Gas in a Box for a car braking Gas in a Box for a roller-coaster loop Gas in a Box for a satellite orbit Gas in a Box for a mass on a spring Gas in a Box for a skydiver's free fall

Frequently asked questions

Is this good for hobbyists & makers?: Yes — this version of "Gas in a Box for a playground swing" 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.