Tuning Fork and Ball on a String

Concept Overview

1. Vibration of a tuning fork
2. Vibration creates sound

Lecturer Procedure

Steps to Follow

1. Strike tuning fork with the mallet.
2. Bring tuning fork very slowly near the ball.

Expected Result

The ball will bounce away at a high amplitude.

Historical References; Taken from original work of Percy H. Carr, 1970 

“For several seconds the ball will continue to bounce, sometimes far, sometimes not so far. If you have not seen this before, you will be surprised by the vigor of the action.”