Lagrangian mechanics problem:

  • Thread starter Fabio010
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  • #1
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Homework Statement




Write the lagrangian equations for:

A simple pendulum whose suspension point oscillates horizontally in its plan according to the law


x = a.cos(ωt)


My problem is trying to know which are the generalized coordinates.

i considered :


x (θ) = a.cos(ωt) + l.sinθ

y (θ) = l.cos θ


Is that correct?
 
Last edited:

Answers and Replies

  • #2
TSny
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That looks good. But to be specific, what is (or are) your generalized coordinate(s)?
 
  • #3
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θ isnt it?
 
  • #4
TSny
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Right. I was just making sure. Thanks.
 
  • #5
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Right. I was just making sure. Thanks.

ok thanks for the help.
 

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