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Homework Help: Horiz range

  1. Oct 6, 2006 #1
    A projectile is fired so that its horizontal range is 3 times its max height. What is the angle?

    Well, I'm stumped because I thought if I just drew up a triangle and did
    arctan(1/3), I would get the correct angle... apparently not.
     
  2. jcsd
  3. Oct 6, 2006 #2

    arildno

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    What are the equations of motion?
     
  4. Oct 6, 2006 #3
    hmm

    x = vx*t
    y = -1/2g*t^2

    I'm not really sure where to go, how the 1:3 would factor into anything.
     
  5. Oct 6, 2006 #4

    arildno

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    Your equation for y is incorrect.

    Set up Newton's second law of motion for the system, both directions!
     
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