StudentChoose a design brief, predict failure modes, test the prototype, then explain tradeoffs and revise against constraints.TeacherLook for constraint reasoning, evidence-backed iteration, failure analysis, and transfer to a new design context.
Mechanism Lab force and gear reviewMECHANISM LAB6-8 coreRAE's garden lift
Rae needs a basket lifted to a hook height with a mechanism that can hold position.
force path
holding: nothing · ratchet; basket: empty · full
RAE REQUIREMENTS
brief requirement: lift reaches the hook and stays there.
ASK RAE
RUN RECORD
nothing wound yet
MechanismLab
band 6-8 · mission — · seed —beam \u00b7 gears
Missions
Invariant witness
benchidle
No machine gives work for nothing: force times distance in equals force times distance out, and every ratio is a count -- teeth, turns, or marks on the beam.
0 events · chain 00000000
Beams, gears, and the ledger
A beam bench where moments print both sides, and a gear wall where teeth are counted, turns are counted, and a work ledger closes on every lift. Commit a prediction before every run.