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Homework Help: 2d motion problem

  1. Oct 12, 2004 #1
    Ok, in this problem a ball with velocity 10m/s flys off the horizontal edge of a canyon, the equation for the canyon is y^2=16x and it wants you to find the x,y cordinates where the ball hits it. I turned the balls motion into a a function of x for y and then set that equal to y=Sqrt(16x) but I can't solve it. It is an easy problem the book says but I can't do the math, or perhaps its my method, to figure it out. Thanks alot for any help.
  2. jcsd
  3. Oct 12, 2004 #2
    If you solve y^2=16x for y, you get y=4*Sqrt[x] and y=-4*Sqrt[x].

    Plot the two curves and decide for yourself which one looks like a canyon. I think you should be able to solve it then.
  4. Oct 12, 2004 #3
    Thanks, im really dumb and was doing my equations wrong :)
    Last edited: Oct 12, 2004
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