PHYSICS   LECTURE   DEMONSTRATIONS

M-D4b : Extended Atwood Machine

UNIT: Dynamics, Torque
PURPOSE: To compare torque with the weight on each pulley
EQUIPMENT:
1 Fixed pulley assembly with 2 or more puleys
2 String and asorted weights
SUGGESTIONS:
1 Demonstrate torque with different weight on each pulley
2 Compare weight on pulley one with weight on pulley two.
3 Illustrate the change of weight on either of the pulleys
DISCUSSION: -- 
1.
2.
3.
4.

1. Equilibrium with 100g at r=7.2cm and 360g at r=2.0cm
2. Non-equilibrium with 100g at r=7.2cm and 300g at r=2.0cm; pulling 300g down
3. Just before release
4. Masses accelerating with 100g (on the right) moving down