Momentum Machine: Speed up your spin

Spin in an office chair holding milk jugs! Plus, learn physics. Very fun (but stay safe) activity from the Exploratorium Science Snacks series.

A rotating stool or chair
Two heavy objects (two 2-liter plastic bottles full of water or soda work well, but two 1-gallon plastic milk jugs full of water or milk are even better; the type of mass used is not critical, but it's best to use the heaviest masses you can hold at arm’s length)
A partner

Physical Sciences
- Motion and Forces
  - Momentum and Velocity
  - Newton's Laws
  - Rotation Motion