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## Homework Statement

B is 10kg

C is 20kg

can I find a lagrangian for this system? If so how?

Diagram: http://imgur.com/j811rzw

## Homework Equations

L=T-V

Kinetic = .5mv^2

Potential = mgh

## The Attempt at a Solution

I know the kinetic energy must be 0 right? How could I find the potential?