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Homework Help: Parametric equations

  1. Feb 17, 2010 #1
    1. The problem statement, all variables and given/known data

    Parametric equations for the motion of an object are given, where x and y are measured in meters and t is in seconds. find the speed of the object in meters per second when t is 2 seconds.
    x=2cost
    y=2sinst
     
  2. jcsd
  3. Feb 17, 2010 #2

    gabbagabbahey

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    Homework Helper
    Gold Member

    You need to show some effort to get help here. If you are completely stuck, I suggest you start by looking up the definition of speed.
     
  4. Feb 18, 2010 #3
    t stands for time in seconds
    x and y stand for distances

    so to calculate the speed you need get the derrivative equations of f(t,x) and f(t,y)
    then you will be able to find the speed in both the x and y directions and use the pythagoras theorem to find the speed of the object.
     
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