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Homework Help: Projectile Motion of fire hose

  1. Sep 26, 2007 #1
    A fire hose held near the ground shoots water at a speed of 7.8 m/s.

    At what angles should the nozzle point in order that the water land 2.0 m away

    I don't even know where to start. Can anyone set me in the right direction?
  2. jcsd
  3. Sep 26, 2007 #2
    Forget about the fact that it's a stream of water and think about normal projectiles.
  4. Sep 26, 2007 #3
    i just can't figure out how to find the component vectors, which is where i think i need to start.
  5. Sep 26, 2007 #4
    Do you know the equations for projectile motion?
  6. Sep 26, 2007 #5
    yea, i have them in front of me but i'm having trouble applying them right now.

    i'm so frustrated right now i just don't know where to start.
  7. Sep 26, 2007 #6
    i'm starting to think it has something to do with the range equation. am i going in the right direction?

    do i set it equal for sin?

  8. Sep 26, 2007 #7
    You know your speed, and you know your dX (horizontal distance) and you obviously know g. So use the equation with these variables and solve for the angle (theta).
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