## A Lagrangian Dynamics Problem

1. The problem statement, all variables and given/known data

Hi all, I need to derive differantial equations of system with lagrange multiplier method, a disk is rolling and a bar is fixed onto the point of a disk

By deniz120 at 2010-05-31

2. Relevant equations

3. The attempt at a solution
please check my solution below, I derived T and V for Lagrange, all I need is help for constaints, lagrange multiplier equation. Thanks in advance:)

By deniz120 at 2010-05-31]

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 Recognitions: Gold Member Homework Help Science Advisor Staff Emeritus What specifically about the constraint is giving you problems? You might find this page helpful: http://www.slimy.com/~steuard/teachi....html#CalcVari
 unfortunately nothing, I guess there is nonholonomic constraint thanks

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## A Lagrangian Dynamics Problem

It's not a nonholonomic constraint.

You have only two coordinates, β and θ. How are they related?

 I guess you are right but that is the exact question that I m looking for the answer, how are they related:)
 Recognitions: Gold Member Homework Help Science Advisor Staff Emeritus Really? It's basic geometry. Consider the height of point B.

 Tags dynamics, equation, lagrange, lagrangian, multiplier