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HELP ME with physics homework about mag/dir

  1. Nov 13, 2009 #1
    1. The problem statement, all variables and given/known data
    A powerboat heads due northwest at 13 m/s relative to the water across a river that flows due north at 6.0 m/s. What is the velocity (both magnitude and direction) of the motorboat relative to the shore?


    2. Relevant equations
    i'm not sure


    3. The attempt at a solution
    i thought i could use the Pythagorean theorem
     
  2. jcsd
  3. Nov 13, 2009 #2
    Draw yourself a diagram of the problem and set up a convenient set of coordinate axes. You need to do vector addition so the easiest would be to find the components of the vectors in question.

    Go from there :)
     
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