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Damped oscillations - Finding damping coefficient

  1. Apr 29, 2009 #1
    1. The problem statement, all variables and given/known data
    A 50.0g hard-boiled egg moves on the end of a spring with force constant k = 25.0 N/m. It is released with an amplitude 0.300m. A damping force Fx = -bv acts on the egg. After it oscillates for 5.00s, the amplitude of the motion has decreased to 0.100m.
    Calculate the magnitude of the damping coefficient b.

    2. Relevant equations
    render?tex=x+%3D+Ae%5E%7B-bt%2F2m%7D%5Ccos%7B%28%5Comega+%27t%2B%5Cphi+%29%7D.gif


    3. The attempt at a solution
    I honestly have no idea how to approach this question. Could someone steer me in the right direction?
     
  2. jcsd
  3. Apr 29, 2009 #2
    Anyone?
     
  4. Apr 30, 2009 #3

    Redbelly98

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    Note that the amplitude, at time t, is given by


    Amplitude = A e-bt/2m
     
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