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Homework Help: Addition of Vectors using a scale diagram

  1. Jan 14, 2012 #1
    1. The problem statement, all variables and given/known data
    Add each set of vectors by using the scale diagram

    C=28km 20 degrees north of east; D=34 km 30 degrees west of north


    2. Relevant equations



    3. The attempt at a solution
    Attempted to create a triangle with a right angle; then Pythagorean
     
  2. jcsd
  3. Jan 14, 2012 #2

    Simon Bridge

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    The vectors do not form a right-angle between themselves.
    You need to draw them head-to-tail.

    Pick a scale, say 1cm=1km, and mark a point on your paper as the starting point and a direction for north.

    Draw the vector C from the dot - use a ruler and protractor to draw it to the right length and angle - it should look like an arrow pointing away from the start point. Then draw vector D, starting at the head of vector C you just drew.

    Nor draw an arrow that goes from the start point to the head of D - that is the vector sum of the other two. Measure the length and angle of this one.
     
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