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Homework Help: Plane Speed Relative to Ground

  1. Sep 28, 2015 #1
    1. The problem statement, all variables and given/known data

    The compass in a plane indicates that the plane is pointed due east; its air speed indicator reads 212 km/hr. There is a steady wind blowing from the north with a speed of 60.0 km/hr. What is the speed of the plane with respect to the ground?

    2. Relevant equations

    [tex] \sqrt{c^{2}_{x} + c^{2}_{y} } = |c| [/tex]

    I think

    3. The attempt at a solution

    I tried setting up a right triangle but nothing works. Can someone point me in the right direction, I'm very frustrated.
  2. jcsd
  3. Sep 28, 2015 #2


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    Homework Helper

    What are you using for c_x and c_y in your equation? That appears to be the right way to approach this problem.
  4. Sep 28, 2015 #3

    Yeah the online submission was broken. The answer was 220 km/hr, but it would only take 219 km/hr as the answer. All good now.
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