Lecture Demos: Mechanics, 1C20.10

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The Penny and the Feather

A tube with pennies and feather inside has all the air taken out of it. When this happens, the penny and feather will fall at the same rate.

PIRA Code(s): 
1C20.10
Set up time: 
1 minute
Physics and Science Concepts: 
Uniform Acceleration, Mechanics, Gravity
Operation: 
Tip the tube with penny and feather upside down. The penny will fall faster than the feather. Then, use the pump to evacuate all of the air. Like before, turn the tube upside down and the two objects will fall at the same rate.
Safety: 
Do not crack tube. Must check out demonstration 3B30.30 to obtain and use pump.

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