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Homework Help: Vectors, Direction, and Net displacement

  1. Feb 26, 2010 #1
    I have been working on the following two problems and I cant seem to get any progress.
    Any help from anyone would be greatly appreciated. I know it seems simple to those who are familiar but I have no background in this type of equations.

    1. A helicopter travels northwest 70.7 miles, then straight east 100 miles, and finally straight south 100 miles. How far and in what direction is it from point of origin?



    2. A ship sails 100 miles northwest then 141.4 miles due south. How far and in what direction is it from its starting location?
     
  2. jcsd
  3. Feb 26, 2010 #2
    for 2

    100 miles NW
    141.4 miles S

    x=100cos135=-70.71
    y=100sin135=70.71

    Mag=sqrt(-70.71)^2+(70.71)^2
    Mag=sqrt10000
    Mag=100miles

    is this on the right track for this problem?
     
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