To Demonstrate how airflow can cause flotation.
- Ping pong ball
- Vacuum cleaner blower
Ping Pong Ball in Air Stream and Diagram.
The ping pong ball is carefully released into the vertical air stream obtained from the outlet end of a vacuum cleaner at a distance of approximately 30 cm from the hose. By slowly tilting the hose outlet the ball can remain suspended to an angle of about 30°.
It is also fun to replace the ping pong ball with a large light beach ball or large balloon. The distances are magnified and the spinning ball is visually appealing.