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Homework Help: Simple Vector Addition

  1. Feb 13, 2012 #1
    1. The problem statement, all variables and given/known data

    Two vectors are given by a = 2.3 x - 9.7 y and b = -18.6 x + 2.8 y. What is the magnitude of a?

    What is the angle between vector b and the positive x-axis?

    What is the magnitude of the vector a + b?

    2. Relevant equations

    I don't know

    3. The attempt at a solution

    None. I don't need the answer I just need to know like the steps to do it. I missed a class and don't have a book so I don't know how to do this >.< Any help is appreciated.
  2. jcsd
  3. Feb 13, 2012 #2


    User Avatar

    Staff: Mentor

    A web search will turn up lots of resources for vectors and vector operations. Here's an example: http://www.physicsclassroom.com/class/vectors/u3l1b.cfm
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