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Properties of vectors

  1. Sep 16, 2007 #1
    1. The problem statement, all variables and given/known data

    A surveyor measures the distance across a straight river by the following method:starting directly across from a tree on the opposite bank, she walks 100m along the riverbank to establish a baseline. Then she sights across a tree. The angle from her baseline to the tree is 35.0(degree). How wide is the river?

    2. Relevant equations
    I think this is a resultant vector problem. Where R(x)=A(x)+B(x), R(y)=A(y)+B(y). Then, Ill take the magnitude of both (R(x)+R(y))^1/2

    3. The attempt at a solution

    What I stated above is what I thought a solution, but Im stuck at the word "wide"? Not sure if Im on the right direction.
  2. jcsd
  3. Sep 16, 2007 #2
  4. Sep 16, 2007 #3

    Doc Al

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    Staff: Mentor

    This is geometry/trig problem, not a vector problem. Draw yourself a diagram and you'll find a right triangle.

    Looks like lylos drew one for you!
  5. Sep 16, 2007 #4
    So how can i even go about solving this problem, if its a right triangle formula? This homework question was in the vector chapter of the book
  6. Sep 16, 2007 #5

    Doc Al

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    Staff: Mentor

    To solve many vector problems, you need to know about right triangles. This should be an easier problem than many vector ones.
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