"Coin and Feather" fall in an evacuated rotatable tube.

Coin and Feather apparatus: Free-falling bodies in air and vacuum. A 1 meter long glass cylinder is pumped down in class with a vacuum pump. When the vacuum is complete ( 30 sec.), the valve is closed, and the hose Vacuum Pump is disconnected.The handles are used to invert the cylinder to allow the coin and feather (or paper) to drop. Note: there is also a portable tube which can be carried with vacuum to class.