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Homework Help: Harmonic Motion, finding v

  1. Dec 1, 2011 #1
    1. The problem statement, all variables and given/known data

    The position of a 49 g oscillating mass is given by x(t)= (2.3cm) cos 11t , where t is in seconds.
    Determine the velocity at t = 0.43s

    f= 1.75
    vmax=0.25 m/s

    2. Relevant equations

    I'm using v(t)= -vmax sin (2pi*f*t)

    3. The attempt at a solution

    Using above equation and variables I get 0.0206, which is wrong (mastering physics).

    Can't figure this one out..
    Last edited: Dec 1, 2011
  2. jcsd
  3. Dec 1, 2011 #2
    Annnnd.. I was in deg and not rad.. Funny how something so small can cause such great frustration. Answer is .25
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