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Another amplitude and oscillation problem

  1. Jan 25, 2010 #1
    1. The problem statement, all variables and given/known data

    A small earthquake starts a lamppost vibrating back and forth. The amplitude of the vibration of the top of the lamppost is 6.5 cm at the moment the quake stops, and 8.0 seconds later it is 1.8 cm.

    A. What is the time constant for the damping of the oscillation? _____ seconds

    B. What was the amplitude of the oscillation 4.0 s after the quake stopped? _____ cm


    2. Relevant equations

    A. ?????

    B. ?????


    3. The attempt at a solution

    Don't know where to start :confused:
     
  2. jcsd
  3. Jan 26, 2010 #2

    tiny-tim

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    Hi LBRRIT2390! :smile:

    What is the standard equation for damped motion with time constant T?
     
  4. Jan 26, 2010 #3
    I honestly have no idea
     
  5. Jan 27, 2010 #4

    tiny-tim

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    What do you know about damped motion, then? :confused:
     
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