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Oscillations & spring problem.

  1. Aug 5, 2008 #1
    A massless sping of spring constant k=74 N/m is hanging from the ceiling. A 490g mass is hooked onto the unstretched spring and allowed to drop. Find the amplitude and the period of the resulting motion.

    F= -kx

    x= A cos (wt)
    w = sqrt(k/m) t

    I'm trying to solve for A, but how do I get rid of the t variable?

  2. jcsd
  3. Aug 5, 2008 #2


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    Homework Helper

    Find [itex]\omega[/itex] and you could use the fact that at max displacement from the equilibrium posistion, velocty=0.
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