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Homework Help: Projectile motion problem

  1. Sep 16, 2007 #1
    I'm having trouble solving this one. Help would be much appreciated!

    A fire hose held near the ground shoots water at a speed of 7.1 m/s.

    a.) At what 2 angles could the nozzle point in order that the water would land 2.0 m away?

    b.) why are there two different angles?
  2. jcsd
  3. Sep 16, 2007 #2
    What path does a projectile make? What's the equation of the path?
  4. Sep 16, 2007 #3
    it is shot in an upward angle <90 degrees. I don't know the equation of the path.
  5. Sep 16, 2007 #4
    Projectiles always follow a parabola. Do you know the equation for a parabola as a parametric equation (i.e. expressing both x and y as functions of t)?
  6. Sep 16, 2007 #5
    uh, I'm not really sure. How would you recommend solving this?
  7. Sep 16, 2007 #6
    A web forum isn't really the best substitute for a textbook or a teacher. Have you covered this in class? Is there a textbook that you can refer to?
  8. Sep 16, 2007 #7
    Is this a homework question?????

    And yes, there are two different angles.

    Hint...What is the shortest trajectory to a terget 2.0m away?

  9. Sep 16, 2007 #8
    Sorry for the Q about homework. Thread was moved while I was writing.

  10. Sep 16, 2007 #9
    Yeah this is homework if it matters. I have no clue what the shortest trajectory is. I just need to know what equation pertains to this problem
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