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Homework Help: Simple harmonic motion

  1. May 25, 2010 #1
    The total movement of a body oscillating with simple harmonic motion is 200mm. If the frequency of oscillation is 6Hz, determine the maximum velocity and maximum acceleration of the body.

    I missed the class when this was done so I haven't got the notes. Im not sure if this is right but I found these equations

    v = w Acos wt
    a = -w2 Asin wt = -w2y

    Anyone point me in the right direction please?
     
  2. jcsd
  3. May 25, 2010 #2

    rock.freak667

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    If you know v=ωA*cosωt

    vmax will occur when cosωt is maximum, so cosωt is what number?
     
  4. May 26, 2010 #3
    I found this info http://electron9.phys.utk.edu/phys135d/modules/m9/oscillations.htm [Broken] so Im reading this.
     
    Last edited by a moderator: May 4, 2017
  5. May 26, 2010 #4
    Im still none the wiser!
     
  6. May 26, 2010 #5

    rock.freak667

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    Well let's start simple. For the graph of y=sinx, what is the maximum value of y? (the graph oscillated between?)


    what is the relationship between ω and the frequency?
     
    Last edited by a moderator: May 4, 2017
  7. May 26, 2010 #6
    Is the max value of y 1? Going back to trig and waveforms.
    Isn't ω 2∏ times the frequency?
     
  8. May 26, 2010 #7

    rock.freak667

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    Right, so wouldn't

    vmax=ωA ?
     
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