Ball and feather in air/vacuum

PIRA index: 1C20.10

Description

A feather falls more slowly than a ball down a tube due to air resistance. When the tubes are evacuated, both the feather and ball fall with equal speed.

Equipment

• Double tube assembly
• Vacuum pump
• Clear flexible tubing

• • Power cable
  • Extension cord

Instructions

With both cylinders in air, rotate the tubes by 180 degrees...

Keywords

ball, drop, feather, vacuum

Images & Movies

• 

  caption

• 

  caption

• 

  caption