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Observed angular velocity function of object moving in straight path

  1. Mar 30, 2014 #1
    Hello, I have been trying to find an equation to represent the observed angular velocity of any object traveling in a straight path x and y distance away from where its being observed, along with the moving objects velocity. My problem is that I am getting a differential equation that in its simplest terms makes complete sense, but I cant get anything out of it. If you all could help out that would be great. I have attached an illustration, with my progress on it so far in the upper right corner. I am needing this for a camera tracking system, where it sees points as x and y coordinates. After calibrated, I need to include its observed angular velocity, and I could include angular acceleration that would be great too! Thanks again for all of your help.
     

    Attached Files:

  2. jcsd
  3. Mar 31, 2014 #2
    x = y tanθ

    [tex]\frac{dx}{dt}=y sec^2θ\frac{dθ}{dt}[/tex]
    [tex]sec^2θ=\frac{x^2+y^2}{y^2}[/tex]
     
  4. Mar 31, 2014 #3
    Thankyou for the answer, could you tell us where you got the sec^2=x^2+y^2/y^2? I have never seen that in any of my maths
     
  5. Mar 31, 2014 #4
    nevermind i just figured it out haha. Thanks!
     
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