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The Leaping Ball (or egg)
Transcript of The Leaping Ball (or egg)
This experiment uses wind energy to move an object from one place to another.
This experiement uses Bernoulli's Principle, the principle in hydrodynamics that states the pressure in a stream of fluid is reduced as the speed of the flow is increased
Enough wind pressure must be used in the correct direction tolift up the ball out of the cup and direct it to the second glass
These questions were posed to my 2nd grader once she got home. They are currently learning about forces of motion in class and she came up with the wind force all on her own! .
First attempts were hard...
But making slight adjustments to force and direction we were successful!
Some more questions I would ask would be
What makes the ball jump out of the glass?
What does the flowing air create?
How far apart can we place to glasses and still move the ball between them?
2 wine glasses of equal size
1 ping pong ball or boiled egg
Questions to consider:
What would happen if we blew on the same side of glass as the ball?
Family Education Network. (2015). Infoplease/Bernoulli's Principle. Retrieved from http://www.infoplease.com/encyclopedia/science/bernoulli-principle.html 10/2015
We successfully found that
by applying a strong force of wind in an oblique direction in the glass created just enough force to lift the ball and carry it to the second glass. By applying a direct stream or force of air into the narrower space of the glass, we are forcing the direction of the wind and increasing the volume of the kinetic energy. This forces the ball to flow out of the glass with the wind and drop into the other. (Bernoulli's Principle/Infoplease)