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Homework Help: Displacement vectors

  1. Feb 4, 2008 #1
    1. The problem statement, all variables and given/known data
    a radar operator of a cutter observes that at 10h20m a ship is at a distance of 9.5km on a bearing of 60defrees East of North and at 11h10m it is at a distance of 4.2km on a bearing of 33 degrees East of North

    a. Measured from its postion at 10h30m what is the displacement vector of the ship at 11h10m
    b. assuming the ship continues on the same course at the same speed what will be its displacement vector (starting from initial sighting) at 11h30m

    c. what will be its distance and bearingfrom the cutter

    2. Relevant equations

    law of sines , law of cosines

    3. The attempt at a solution

    a. using law of cosines I got part a 6.07km and 78.3 degrees WofS
    part b I know it is still 78.3 but I am not sure how to find the displacement vector or how to approach part c
  2. jcsd
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