Rattleback Reverses Direction
In one direction it wobbles, stops, and reverses.
Teaching & key ideas
What you do: Spin it one way, then the other.
What students see: In one direction it wobbles, stops, and reverses.
Why it works: Its asymmetric shape couples rocking and spinning; friction transfers energy between motions.
Question to ask: Why does it only like one spinning direction?
Lesson flow
Predict → demonstrate → observe → briefly explain → ask: Why does it only like one spinning direction?