Explicit non-holonomic equations of motion

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SUMMARY

The discussion focuses on the explicit non-holonomic equations of motion, emphasizing the necessity of Lagrange multipliers for correctly addressing non-holonomic constraints. Participants reference Greenwood's classical dynamics and Landau and Lifshitz's volume 1 as key texts for understanding these concepts. The conversation highlights that non-holonomic constraints are local and cannot be resolved merely by selecting independent coordinates, unlike holonomic constraints. The participants express a need for a general explicit formulation of the equations of motion that incorporates these constraints.

PREREQUISITES
  • Understanding of Lagrangian mechanics
  • Familiarity with non-holonomic constraints
  • Knowledge of Lagrange multipliers
  • Basic principles of classical dynamics
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  • Research the explicit forms of non-holonomic equations of motion
  • Study Lagrange multipliers in the context of non-holonomic systems
  • Examine case studies in Greenwood's classical dynamics
  • Explore advanced topics in Landau and Lifshitz's treatment of constraints
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Students and professionals in physics, particularly those specializing in classical mechanics, as well as researchers looking to deepen their understanding of non-holonomic systems and their equations of motion.

andresB
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In the holonomic case, we can put the Lagrangian in the Lagrange equations to obtain the explicit form of the equations of motion. From Greenwood's classical dynamics book, the equations are
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Are there such general equations for the non-holonomic case?
 
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Have a look in Landau Lifshitz vol. 1, who gets the non-holonomic constraints right. You have to introduce Lagrange multipliers in the right way!
 
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vanhees71 said:
Have a look in Landau Lifshitz vol. 1, who gets the non-holonomic constraints right. You have to introduce Lagrange multipliers in the right way!

Long time without reading Landau, and I have to say that its treatment of the non-holonomic constraint seems disappointingly scarce.

In any case, I'm not looking for the Euler-Lagrange+ lagrange multipliers equations, they are in every book. Instead I'm lookinf for the final general form of the equation of motion.
 
But these are the final general form of the equation of motion. Non-holonomic constraints are local constraints, and you cannot satisfy them by simply choosing a set of independent coordinates as for holonomic constraints.
 
vanhees71 said:
But these are the final general form of the equation of motion. Non-holonomic constraints are local constraints, and you cannot satisfy them by simply choosing a set of independent coordinates as for holonomic constraints.

But the Lagrange equations are just a step in the final solution of the problem. They have to be solved togheter with the non-holonomic constraint equations. I know how to do it in specific examples that can be found in the standard books, but I would be surprised if no general explicit formulat exist.
 

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