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

Torsional Pendulum, Logarithmic Decrement

  1. Jul 21, 2009 #1
    The amplitude of a torsional vibration decreases so that the amplitude on the 100th cycle is 13% of the the amplitude of the first cycle. Determine the level of damping in terms of the logarithmic decrement.

    Is this simply ln(100/13)= 2.04

    or ln(13/100)= -2.04?
     
  2. jcsd
  3. Jul 22, 2009 #2

    rl.bhat

    User Avatar
    Homework Helper

    Level of damping δ = 1/n*ln(xo/xn)
    where n is the number of cycles, xo is the initial amplitude and xn is the amplitude after n cycles.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Similar Discussions: Torsional Pendulum, Logarithmic Decrement
  1. Torsion Pendulum (Replies: 2)

  2. Torsion pendulum (Replies: 2)

  3. Torsional Pendulum (Replies: 2)

  4. Torsion pendulum (Replies: 2)

  5. Torsional pendulum (Replies: 7)

Loading...