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Harmonic Motion Question

  1. Nov 24, 2009 #1
    1. The problem statement, all variables and given/known data

    A 215 g mass attached to a horizontal spring oscillates at a frequency of 5.20 hz. At t=0 s, the mass is at = 4.00 =cm and has velocity 26.0 cm/s. Determine the Amplitude.

    2. Relevant equations

    x(t)=ACos(2(pi)t)/T

    3. The attempt at a solution

    Well at t=o x=4, but then the 2(pi)t goes to zero and the whole equation equals 0. What am I doing wrong? Thanks for any and all help


    And yes sorry units would help so there they are.
     
    Last edited: Nov 24, 2009
  2. jcsd
  3. Nov 24, 2009 #2
    Units would help. 215 grams? 5.20 Hz? 4.00 cm?
     
  4. Nov 24, 2009 #3
    Sorry, new here.

    1. Remember phase shift
    2. Frequency....Angular frequency?
    3. Consider two equations x(t) and v(t)
    4. Solve....
     
    Last edited: Nov 24, 2009
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