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Bernoulli ping pong experiment

You will need:

 
  • 1 Table tennis ping pong ball
  • 1 Funnel

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Instructions

 
  1. Place the ball into the funnel.
     
  2. Blow through the funnel spout - can you get the ball to come out?
     
  3. Is there another way of blowing the ball out of the funnel?
     
  4. Try blowing across the top! This works... but why?
Bernoulli funnel air experiment
You really, really, really can't blow the ball out!
 
Be Amazing Book Front Cover; Ben Newsome, teacher & founder of Fizzics Education. Be Amazing -how to teach science the way primary kids love
Be Amazing!
How to teach science, the way primary kids love

 
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Why does this work?

Things move from high to low pressure areas. The lower the pressure, the stronger the action. Think of a tornado - they have very low pressure in the middle of their funnel!

The mathematician Bernoulli found that moving air has less pressure than air that is still.
The curved surface of the ball made the air travel faster below the ball than the still air above the ball. The moving air below the ball had less pressure, which sucked the ball into the funnel. The same idea can be applied to vortex smoke rings too!

Bernoulli's work on the pressure of fluids and gases helped to design wings on planes.
Find out why here!

Other air pressure based science experiments
 
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