Do I need to install anything?

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

For Hobbyists & Makers · Gravity Well

Gravity Well for a rolling barrel

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

Gravity Well StudioLive

curved spacetime · rubber-sheet analogy

Controls

The classic rubber-sheet picture of gravity: mass warps the grid, and a body orbits in the curved surface. Drag the star to move the mass and reshape the well; drag empty space to orbit the view.

Presets

Central mass

▶ Run in Python

Data Inspector

Central mass60

Well depth∝ M/r

View3D orbit

Governing equation

Φ = - \frac{GM}{r} = - \frac{60 G}{r}, F = \frac{GM m}{r ^{2}}

Reading this result: At mass 60 the well is moderately curved; the body traces a near-stable ellipse because its sideways motion balances the inward pull (∝ M/r²).

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 "Gravity Well for a rolling barrel" 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.