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How do I get this equation for period?

  • Thread starter frasifrasi
  • Start date
276
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In class, we were asked to the relation T =2π√(2I/mgL).

However, I am only able to get T =2π√(I/mgL) -- I have no idea where that 2 came from. This is for a physical pendulum of a rod like object swinging back and forth.

Does anyone know how to get that equation?
 

Answers and Replies

458
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From what I know, you are right that [tex]T = 2\pi \sqrt{\frac{I}{mgL}}[/tex]

I don't know where that extra 2 came from either.
 
D H
Staff Emeritus
Science Advisor
Insights Author
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It would have helped a lot if you had used the template. What exactly is the problem to be solved here? About what point is the inertia measured? What work have you done to arrive at a solution?
 

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