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Homework Help: Finding Viscous Damping Constamt

  1. Nov 14, 2009 #1
    1. The problem statement, all variables and given/known data

    I am working with a problem of damped harmonic motion. I am given that the motion is in a medium that exerts a force of 2N when the speed is 4 cm/s. The mass is 5kg.

    2. Relevant equations

    C = F/v

    3. The attempt at a solution
    I thought that the viscous damping constant was given by:
    C = F/v = (2N)/(.04m/s) = 50
    But the book used C = (F*g)/v = 490

    What is force times acceleration? It's not the mass, that's for sure. Is the book off here or am I?
  2. jcsd
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