CHALLENGE MISSIONManage friction

Simple machines, mechanisms, friction, and energy

BRIDGE CHALLENGE - Machines and Motion Workshop: A car axle rubs cardboard. What helps? Balance competing needs, defend the strongest design, and propose the next useful test.

MODELMechanism Gear

MAKE

PROVEChoose with evidence

CLUE

Pause. Find what matters. Then make your move.

Bridge evidence note

Explain your choice with one detail, calculation, source clue, observation, or test result.

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