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Homework Help: Spring Mass System

  1. Jan 13, 2010 #1
    1. The problem statement, all variables and given/known data

    An object suspended from a spring with a spring constant of 2.56 N/m vibrates with a frequency of 0.148 Hz
    a. What is the mass of the object
    b. What is the acceleration of the object at a displacement of -0.120m from the equilibriam position
    2. Relevant equations
    a. T=2pi[tex]\sqrt{}m/k[/tex] m=Tk/4pi2' T=1/f
    b. a=-kx/m ????????
    3. The attempt at a solution
    a.T=1/f T=1/0.148Hz T=6.756756757s m=Tk/4pi2' m=(6.756756757s)(2.56N/m)/4pi2' m=2.96kg ---- I do not understand if this is right and I think I made a mistake ----
    b. I cant figure out what equation to use and how to manipulate it to get an equation for acceleration for the condition
  2. jcsd
  3. Jan 13, 2010 #2


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    Homework Helper

    a. It's right.
    b. It's a=-kx/m.
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