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Vector Addition

  1. Sep 27, 2011 #1
    1. The problem statement, all variables and given/known data
    A lost dog travels 30 degrees south of west for 450m. He ten smells some food and sprints at 20 degrees east of north for 600m.
    a) draw each vector. Label magnitude and theta.
    b) calculate the vector components
    c) calculate the magnitude of the dog's displacement.

    2. Relevant equations
    my guess is that there are two part of the components
    sin30= y/450
    cos30= x/450
    sin70= y/600
    cos70=x/600

    3. The attempt at a solution
    225
    389.7
    563.8
    205.21

    and i have no idea what to do with the magnitude of dog's displacement
     
  2. jcsd
  3. Sep 27, 2011 #2
    I desperately need some help please
     
  4. Sep 28, 2011 #3
    It might help if you were to draw the vectors. Then you would see that some of those numbers need to be negative, and the result would give you the x and y components of the resultant vector.
     
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