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M-D4a : Atwood Machine

UNIT: Dynamics, simple machines
PURPOSE: Companion to At wood Machine problems
EQUIPMENT:
1 Large pulley on a stand
2 String and asorted weights
SUGGESTIONS:
1 Demonstrate equilibrium with equal weights
2 Compare motion of m1, for m1>m2, with the free fall of m3=m1-m2
3 Illustrate the effect of changing m1 or m2 by equal amounts
DISCUSSION: -- 
1.
2.
3.
     

1. Set-up in equilibrium
2. Adding a small weight to upset the equilibrium
3. The masses accelerate with the one on the right going down