1M40.65 Height of a Spring-launched Ball
Launch tennis ball (57 grams) using the first click of the launcher. It will go almost 2 meters high. Then launch weighted tennis ball (334 grams) to show mass dependence on energy.
When the mass of the plunger and half the mass of the spring (188g) are accounted for the mass ratio works out to 2:1
Location: Launcher: C3-4; Large Two-Meter Stick: right of the turntable