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

My problem is a pretty basic one, in a exercise a rigid rod of massMis rotating around a horizontal pivot point i one end. The rod has the lengthL. I now need to derive the equation of motion using the Lagrangian formalism.

My question is:

Can i view the rod as a pendulum with a bob mass equal to that of the rod?

In this case the equation would simply be:

[itex]\theta '' + \sqrt{\dfrac{g}{L}} sin(\theta)=0[/itex]

Best Regards

Cole.

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# Homework Help: Equation of motion for a rigid rotating rod

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