Coanda Effect  -  Funnel and Ball




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 Code Number :   2C20.35  

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Reprinted by permission of Dick Berg, University of Maryland, for use on this website.

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Condition :   Good  
Principle :   Bernoulli's Principle  
Area of Study :  Heat & Fluids   
Equipment :   Ping-pong balls, Funnel with plastic tube. 
Procedure :   Turn the air stream on full blast and hold the funnel so that the wide end points towards the ground.  Bring a ping pong ball into the wide end of the funnel and at some point it will be sucked up into the funnel and will stay there against gravity.
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   References

Fj- 4:  Freier and Anderson,  A Demonstration Handbook for Physics.

 

F- 220:  "Ball in Funnel,"  DICK and RAE Physics Demo Notebook.

 

M- 293:  Richard Manliffe Sutton, Demonstration Experiments in Physics.

 

Janice VanCleave,  "Floating Ball,"  Physics for Every Kid - 101 Easy Experiments in Motion, Heat, Light, Machines, and Sound.  p. 104-105.

Robert Ehrlich,  "Ping-Pong Ball in an Inverted Funnel,"  Turning the World Inside Out, p. 105-106.



Mail Questions and Comments to:  Dale Stille