Start with a turn or a pull. Connect gears, engine timing, crane rigging and the surprising forces inside an arm.
Interactive explorationTilt a real robot model while keeping its gripper center on a target. Compare two routes between the same poses, discover what stops a reach, and build a paper arm with two ways to touch one point.
Interactive explorationFollow a transparent car around a bend, open its rear axle, and discover how a differential shares motion, torque and a low-grip limit.
Interactive explorationRun a virtual wind-tunnel test. Tilt a symmetric airfoil, probe both surfaces, and build the whole lift force from pressure around the wing.
Interactive explorationOpen a detailed engine, turn its crank, and take the assembly apart. Follow four different jobs hidden inside two very similar-looking turns.
Interactive explorationRerig a dock crane. Pull the same length of rope, watch the crate rise, and see what you trade for an easier lift.
Turn once. Count what happens. Discover gear ratios, real-world uses, and why different jobs need different gears.
Move a load closer to an elbow on a transparent teaching arm. See the force change, then explore how muscles can work without visible movement.
Squeeze a hydraulic brake. See inside the caliper, change piston sizes, and discover how pressure becomes force.
Take these steps at your own pace. Your place is not saved as account progress or scored.