Inertia - Small Steel Ball

Purpose

To demonstrate inertia of rest.

Equipment

Stand with spring, card, and ball, as photographed.

Suggestions

This experiment is useful only for small groups.

Images

c3-01

Description

A spring is pulled back and released, flipping the card away so that the steel ball falls into the cup. A small flat has been filed onto the ball so that it will rest in position on the card.

References

Haym Kruglak and Robert Scherzer, An Applause-Winning Inertia Trick, TPT 33, 284 (1995).