Pull-Back Car Stores Energy
It shoots forward without another push.
Teaching & key ideas
What you do: Pull the car backward, hold it, then release.
What students see: It shoots forward without another push.
Why it works: The internal spring stores energy while the car is pulled back.
Question to ask: Where was the energy stored?
Lesson flow
Predict → demonstrate → observe → briefly explain → ask: Where was the energy stored?