Difficult Problems in Classical Mechanics

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Discussion Overview

The discussion revolves around finding difficult problems in classical mechanics for academic purposes. Participants are exploring various sources and types of problems, including those that utilize advanced concepts such as calculus of variations.

Discussion Character

  • Exploratory
  • Technical explanation
  • Homework-related

Main Points Raised

  • One participant expresses frustration with the lack of challenging problems in their current textbook and seeks recommendations for more difficult classical mechanics problems.
  • Another participant suggests looking in the school library for Goldstein's and Landau's texts, which are known to contain challenging problems.
  • A participant presents a specific problem involving a frictionless bead on a wire, asking for the shape of the curve that minimizes transit time under gravitational force, highlighting its connection to calculus of variations.
  • David Morin's Classical Mechanics book is mentioned as a source of interesting and challenging problems.
  • The same problem involving the bead is reiterated, with a historical note on the brachistochrone problem, suggesting that while it was once considered challenging, it may now be viewed as a trivial exercise in calculus of variations.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the difficulty of the brachistochrone problem, with some viewing it as trivial while others may still consider it challenging. The discussion remains open regarding the best sources for difficult problems.

Contextual Notes

Some participants reference specific texts and problems, but there is no agreement on a definitive list of challenging problems or a singular source that meets the needs expressed.

Who May Find This Useful

Students and educators in classical mechanics looking for challenging problems and resources for deeper exploration of the subject.

SpaceWalrus
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My professor for classical mechanics has asked that we find some difficult problems in classical and solve them. My first thought was to look through my book for hard problems. However, we are using a free PDF that is rather lackluster when it comes to homework problems. Almost all of the questions are trivial, and amount to solving for the equations of motion once I have set up the Hamiltonian. I have a copy of VI Arnold's Mathematical Methods of Classical Mechanics on hand. Though I haven't had too much time to peruse it for interesting problems, it appears to be hands-off and not provide many problems.

I currently know the basics of Hamiltonian's and anything below that. Does anyone have any advice where I can find interesting and sufficiently difficult problems in classical to solve? If anyone has any problems of their own, I would love to hear those too.
 
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Look in your school library. Both Goldstein's and Landau's texts on classical mechanics will have challenging problems.
 
Here is a very challenging problem using calculus of variations. A frictionless bead slides on a smooth stiff wire from a fixed upper point x1, y1 to a fixed lower point x2, y2; y2 < y1, x2 ≠ x1 under gravitational force. Find the shape of the curve in the wire such that the transit time is a minimum.
 
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David Morin's Classical Mechanics book has a great wealth of interesting and challenging problems.
 
Bob S said:
Here is a very challenging problem using calculus of variations. A frictionless bead slides on a smooth stiff wire from a fixed upper point x1, y1 to a fixed lower point x2, y2; y2 < y1, x2 ≠ x1 under gravitational force. Find the shape of the curve in the wire such that the transit time is a minimum.
Historically, of course, the brachistochrone problem was very challenging. But nowadays, isn't it a trivial calculus of variations exercise?
 

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