Two-Ball Super Bounce
Tennis ball rockets much higher than its starting height.
Teaching & key ideas
What you do: Stack tennis ball on basketball and drop together.
What students see: Tennis ball rockets much higher than its starting height.
Why it works: The basketball rebounds and transfers momentum/energy into the lighter ball.
Question to ask: Where did the tennis ball get extra speed?
Lesson flow
Predict → demonstrate → observe → briefly explain → ask: Where did the tennis ball get extra speed?