PIRA 1C20.10 Uniform Acceleration:
Penny and Feather
Instructions / Notes:
Picture shows the demonstration as used at the University of Texas
- Demonstration includes a plastic tube containing a penny and a feather.
While the plastic tube is still filled with air allow the copper penny and feather
to rest at one end of tube.
Quickly bring the tube to a vertical position and watch the objects fall.
After the objects are at rest - connect the tube to the pump. It takes less than 1 minute to pump air out
of the tube.
Close valve / petcock and disconnect the hose and repeat as with air.
Tube is about 100 cm long.
Image shown below is courtesy of the University of Minnesota.