A minute or so each

Watch the apparatus work

Every film is recorded from the simulation itself, driven through the same hooks its test suite uses. Nothing is redrawn or animated by hand, so every number on screen is computed by the code that was checked against the closed form. Click through to run any of them yourself.

Light Work

The photoelectric effect: stopping voltage, the threshold, and the Planck constant read off a gradient.

Run it →16–18 extension · quantum

Squeeze & Heat

The gas laws as one cylinder in a heated bath, with the molecules visible and pV = nRT exact.

Run it →Ages 14–16 · Ages 16–18 · thermal

Reading Motion

Kinematics as race-car telemetry, built around reading a graph as a picture of the track.

Run it →Ages 14–16 · Ages 16–18 · kinematics

Ride Along

Relative velocity with the frame as the control: ride a train, close a gap, drop a ball, cross a current.

Run it →Ages 16–18 · frames of reference

Stick & Slip

Friction on a real bench: a crate, a spring balance, a lens on the contact, and heat that accumulates.

Run it →Ages 14–16 · Ages 16–18 · forces

Atwood’s Machine

Predictions about one string: what it pulls with at rest, at release, against a steady hand, and under a tonne.

Run it →Ages 14–16 · Ages 16–18 · forces

Kepler’s Orrery

Gravitation and Kepler’s three laws, with positions solved from real J2000 orbital elements.

Run it →Ages 16–18 · gravitation

Bowstring

Trigonometry from similar triangles to the unit circle to the wave, ending at simple harmonic motion.

Run it →Ages 14–16 · Ages 16–18 · mathematics

Recorded at 1920 × 1080, thirty frames a second, with a virtual clock so the motion is even regardless of how fast the capture ran. The captions were checked frame by frame against the simulation’s own readouts and against the closed-form physics.