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Homework Help: Simple Harmonic Motion Discrepancy

  1. Mar 13, 2009 #1
    1. The problem statement, all variables and given/known data

    A body oscillates with simple harmonic motion along the x-axis. Its displacement varies with time according to the equation x = 5 sin(πt + π/3) meters. The acceleration in m/s2 of the body at t = 1 second is approximately

    2. Relevant equations
    The harmonic motion ones I guess.

    3. The attempt at a solution

    I dont think I have done anything wrong. Since acceleration is d2x/dt2, i found the second derivative of the equation given which is a=(-pi)^2)*(5)(sin(pi*t + (pi/3)). I plug in 1 for t and get approximately 3.6. If the answer was 3.5 and lower i would just round down, but im not sure.

    my answer choices are 3, 49, 14, 43 and 4.3.
  2. jcsd
  3. Mar 13, 2009 #2
    never mind, my calculator was in degree mode, not radian.
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