Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Simple Harmonic Motion - Period (T)

  1. Nov 28, 2007 #1
    [SOLVED] Simple Harmonic Motion - Period (T)

    1. A pendulum oscillates with a period T.

    If both the mass of the bob and the length of the pendulum are doubled, the new period will be _____.




    2. T = 2(pi) x rad (k/m)



    3. Since L is not a part of the equation, it shouldn't affect the period - right? If that's true, then shouldn't the new period be: T/rad (2) ?

    Sorry, I don't know how to insert symbols (i.e. pi and rad).
     
  2. jcsd
  3. Nov 28, 2007 #2

    Kurdt

    User Avatar
    Staff Emeritus
    Science Advisor
    Gold Member

    That equation is for the time period of a spring. The equation for a pendulum is:

    [tex] T = 2\pi \sqrt{\frac{L}{g}} [/tex]
     
  4. Nov 28, 2007 #3
    Thanks. I just figured that out after 5 mins of Googling. My professor hasn't gone over that yet. I guess that is what Friday's lecture is about...since this HW isn't due unti Sunday. Thanks again!
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook