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Homework Help: Spring-Mass problem

  1. Jan 20, 2008 #1
    1. The problem statement, all variables and given/known data
    A weight (unknown mass) is placed on a vertical spring (unknown spring constant) compressing it by 2.5 cm (one inch). What is the natural frequency of oscillation of this spring-mass system?

    2. Relevant equations
    (i) [tex] T = 2*pi*\sqrt{\frac{m}{k}}[/tex]

    3. The attempt at a solution
    I argue that the spring's displacement should be [tex]\frac{mg}{k} = 0.025[/tex]
    So [tex]\frac{m}{k} = \frac{0.025}{g}[/tex]
    Plugged that in and got the natural frequency is 3.15 s^-1.

    I just want to check if the equations are valid and if the displacement is in the right unites (meters, right?)
  2. jcsd
  3. Jan 20, 2008 #2

    Doc Al

    User Avatar

    Staff: Mentor

    Looks good. (What value did you use for g?)
  4. Jan 20, 2008 #3
    Oh, good call. I used 9.81, so it's in meters.
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