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!

Pendulum(damping coefficient)

  1. Sep 24, 2008 #1
    I am giving M=1kg, L=1.0m, T(period) = 2.02sec. I need to find C

    The pendulum is in water.

    The eq of motion is double-dot-theta+(c/m)single-dot-theta+(g/l)theta = 0

    I was doing some research and found this half life formula...T(1/2) = LN(2)/ Lamda. I am not sure where to go from here...

    I know Wn = sqrt(g/L)...
  2. jcsd
  3. Sep 24, 2008 #2


    User Avatar
    Science Advisor
    Homework Helper

    Hi math111! :smile:

    (have a theta: θ and a lamda: λ and use ' instead of dot :smile:)

    hmm … I'm don't think that T(1/2) is the same T that you were given. :confused:

    It is not a good idea to trawl the web looking for an equation that might fit. :frown:

    Hint: do you know any method of solving θ'' + (c/m)θ' + (g/l)θ = 0 ? :smile:
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?

Similar Discussions: Pendulum(damping coefficient)
  1. Damped pendulum (Replies: 6)

  2. Damping coefficient (Replies: 25)

  3. Pendulums and damping. (Replies: 0)

  4. Damping coefficient (Replies: 21)

  5. Pendulum damped (Replies: 1)