1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

How do I get this equation for period?

  1. Apr 2, 2008 #1
    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?
  2. jcsd
  3. Apr 2, 2008 #2
    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.
  4. Apr 2, 2008 #3

    D H

    Staff: Mentor

    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?
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?

Similar Discussions: How do I get this equation for period?