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Homework Help: Undamped, Forced Oscillation

  1. May 23, 2008 #1
    [SOLVED] Undamped, Forced Oscillation

    1. The problem statement, all variables and given/known data
    Damping is negligible for a 0.133 kg mass hanging from a light 6.80 N/m spring. The system is driven by a force oscillating with an amplitude of 1.34 N. At what frequency will the force make the mass vibrate with an amplitude of 0.445 m? There are two possible solutions, enter one of them.

    2. Relevant equations
    A=(F/m)/(sqrt(((w^2 - Wo^2)^2) + (bw/m)^2))
    wo= sqrt(k/m)

    3. The attempt at a solution
    i filled in the equation, solved for w and got 8.63 Hz, but its wrong. A point in the right direction would do wonders.

    Last edited: May 23, 2008
  2. jcsd
  3. May 23, 2008 #2


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    Staff Emeritus
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    Homework Helper

    Did you get 8.63 Hz or 8.63 rad/sec?
  4. May 23, 2008 #3
    the answer was rad/sec. i solved for w but put it in as the frequency. all i needed was a little nudge in the right direction. Thanks for your help!
    Last edited: May 23, 2008
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