PHYSICS   LECTURE   DEMONSTRATIONS

M-R4   :   Spinning Stool

UNIT: Angular momentum
PURPOSE: Demonstrate conservation of angular momentum
EQUIPMENT: 1 Rotating metal stool 2. Two hand-bars (weights)
SUGGESTIONS:
1. Ask a student to sit on a stool, weights in out-stretched hands
2. Spin the student, and ask her to bring the weights in to her chest.
3. Ask her to stretch her arms out again.
DISCUSSION: For best results, select a student of small mass but highly developed sense of balance.
1.
 





 
2.

1. Out-stretched arms, slower spinning rate
2. Arms close to chest, faster spinning rate