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Homework Help: Projectile Problem

  1. Sep 23, 2004 #1
    Im given the initial speed (100m/s) of an object launched at an unkown angle, it needs to just barely go over an object 5m away 2m high.

    Ive made several attempts at this, all of which ending up in the trash
    my most recent try is

    y=(Vy + (1/2)(-9.8)(t^2)
    t = 5/(Vx)

    Then used Vx^2 = 100 - Vy^2
    and subsituted it all in, and i come out with a big mess to solve, so ive assumed this is not the correct (or best) way to do this

    Sorry for not going into more detail, but you should be able to get the idea
  2. jcsd
  3. Sep 23, 2004 #2
    BTW im trying to find the angle...and the 100m/s is the Hypot. componet of the velocity
  4. Sep 24, 2004 #3


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    Homework Helper

    try putting Y = f(x), so you can plug your X, Y and Vo values, and solve for theta.
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