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Homework Help: Projectile Motion airplane final speed

  1. Jan 27, 2010 #1
    1. The problem statement, all variables and given/known data

    An airplane flying 914 m above the ocean at 116 km/hr is supposed to drop a box of emergency supplies to the survivors of a shipwreck on an island. At what final speed will the supplies land on the island?

    2. Relevant equations

    3. The attempt at a solution

    So Vx = 32.222 m/s, is Voy = 0 m/s?
    a = -9.8 m/s/s and y = -914 m?

    So I did Vfy^2 = Voy^2 +2ay and got -133.845 m/s, but that is not right...
  2. jcsd
  3. Jan 27, 2010 #2

    Doc Al

    User Avatar

    Staff: Mentor

    That's just the y-component of the velocity. Combine it with the x-component to figure out the speed.
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