Move a load, find the supporting force and follow its path through a bridge, a lever and a body.
Interactive explorationMove a load across an inspectable steel truss. Lift its deck, catch a diagonal changing from push to pull, repair a missing restraint and follow forces all the way to the supports.
Interactive explorationWatch waves emerge from a buried source, pick synthetic arrivals and reveal the location one clue at a time. Test the clocks, depth and velocity assumptions—and compare the model with real recorded evidence.
Interactive explorationRerig a dock crane. Pull the same length of rope, watch the crate rise, and see what you trade for an easier lift.
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.