- #1

ajcoelho

- 18

- 0

## Homework Statement

I've been trying to find out what is the period os this kind of pendulum decribed here: http://www.eng.uah.edu/~wallace/mae364/doc/Labs/mominert.pdf

The thing is, I've came to the same result shown in equation (11) but my reasoning it's different. I would even say that there is an error on this website on equation 5: in this equaition where is the sin of theta?? It can be omitted, only if the angle between the force vector and position vetor is 90º, but it's not the case clearly!

Am I thinking well? In my reasoning I had also to the aproximattion of cos theta ≈ cos of phi ≈ 1 and in this site things are really simplified just because of that lack of sin of theta...

If you're interested i can also post my reasoning but I'd like to get some help on this equation 5 first...

Thanks a loot!

## Homework Equations

## The Attempt at a Solution

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