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Vector physics help

  1. Oct 30, 2007 #1
    Question 1:

    1. The problem statement, all variables and given/known data
    Vector A points north and vector B points east. If C = B - A, then vector C points...

    A) north of east
    B) south of east
    C) north of west
    D) south of west

    2. Relevant equations



    3. The attempt at a solution

    I know the answer is "south of east" (or at least I'm 99% sure). But why? I don't understand why, exactly. Can someone please explain? Thanks, I really appreciate the help.

    Question 2:

    1. The problem statement, all variables and given/known data
    Vector A is 3.0 units in length and points along the positive x-axis; vector B is 4.0 units in length and points along a direction 150 degrees from the positive x-axis. What is the magnitude of the resultant when vectors A and B are added?


    2. Relevant equations



    3. The attempt at a solution

    This is an image I made that I think shows what they are talking about. From there, I'm not too sure where to go...

    Thanks again.
     
  2. jcsd
  3. Oct 30, 2007 #2

    Kurdt

    User Avatar
    Staff Emeritus
    Science Advisor
    Gold Member

    For question 1, how is the difference of a vector defined. Or how have you been shown to calculate the difference of a vector.

    For question 2, you haven't posted any imagebut what have you learned about vector addition and finding the magnitudes of vectors?
     
  4. Oct 30, 2007 #3
    A diagram is your best friend.
     
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