🛠️ Cart Impact Prototype Build

Teams build a low-fidelity prototype or traffic-safety feature model using foam, cardboard, tape, markers, map overlays, and dynamics carts or toy cars to represent low-speed entrance collisions. They annotate the prototype with force arrows, before-and-after momentum values, and where collision time is increased to reduce force. Students record a short voice reflection describing how their predictions matched the first test and how they handled uncertainty, setbacks, or disagreement during construction.