On the bench · not built yet

Roller Coaster Physics

Design a coaster that completes every loop with friction on; energy conservation decides if it makes it.

Nearby on the shelf

Move a character to match a target position or velocity graph; beat your best time.

Push cargo in zero-g, on ice and on carpet; F = ma becomes a game of precision.

Elastic and inelastic collisions on an air track; conserve momentum and design a crumple zone.