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Geometry and Discrete- AIRPLANE question help XD

  1. Oct 8, 2005 #1
    The wind is blowing N 75 degrees East at 96 km/h. A plane is flying with air speed 320 km/h. Find the heading the plane must have in order to get from A to B, if B is S40 degrees W of A. Include a diagram in your solution.

    Alright, i am totally lost.
    Could someone please maybe put on some tips or who may know what to do in finding the heading of the plane?
    If you could also add a diagram it would be great because this is probably a test question for Geometry. XD

  2. jcsd
  3. Oct 8, 2005 #2


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    Last edited: Oct 8, 2005
  4. Oct 8, 2005 #3


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    I get the same diagram, and angles the same.

    Attached Files:

    Last edited: Oct 9, 2005
  5. Oct 8, 2005 #4
    alright thanks, the A to B part confused me, because i didnt know which part would be A and B lol..
  6. Oct 8, 2005 #5
    bah i am actually now confused in why the 320 km/h or planes speed is the resultant vector. Wouldnt 320 km/h be the S 40 DEGREE W vector in the third quadrant?

    is there anyone else who would think there would be an alternative way ? XD

    my first approach would to think to use the parallelogram theory.
    Last edited: Oct 8, 2005
  7. Oct 9, 2005 #6


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    If 320 km/h was the S 40 degree W vector, the wind would blow the airplane off-target. That is why the airplane must "overaim". I'm not sure what is meant by parallelogram theory, but you should divide the vectors into x and y components.
  8. Oct 9, 2005 #7
    yes, so if i divided it into x and y components, i would be using cartesian vectors right? instead of geometric vectors
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