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Find the damping constant of the Pendulum

  1. Apr 30, 2010 #1
    1. The problem statement, all variables and given/known data
    A physical pendulum consists of a uniform sphere with radius r=2.5cm and mass M = 0.5kg attached to a uniform rod with length L = 1m and mass m=250g

    The friction of the suspension and air moderately reduce the amplitude of oscillation by factor of 2 in 19.6s. What is the damping constant b? Let's assume that the period of oscillation does not change during this time.

    I found the moment of inertia to be 0.609 and the center of mass from the pivot point is 0.85m. I'm stuck here
  2. jcsd
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