Small Single Brass Tube and Ping Pong Ball, Large water tank with drain hole.
Ping Pong ball in the water stream

 

Code Number: 2C20.36

Demo Title: Coanda Effect - Ball in a Water Stream

Condition: Good

Principle: Coanda Effect, Entrainment

Area of Study: Fluids

Equipment: 

Small Single Brass Tube and Ping Pong Ball, Large water tank with drain hole.

Procedure:

The ping pong ball in the water stream is a very impressive demonstration.  HOWEVER: This can be very messy if extraordinary measures are not employed to confine the water.  In our case this would mean the use of the very large water tank.

References:

  • F- 225:  "Ball in Air or Water Jet",  DICK and RAE Physics Demo Notebook.
  • M- 292:  Richard Manliffe Sutton, Demonstration Experiments in Physics.
  • Jearl Walker, "2.50, Coanda Effect", The Flying Circus of Physics Ed. 2, p. 101.
2C20.36 - Ball in Water Stream