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Homework Help: Finding Magnitude

  1. Sep 19, 2010 #1
    1. The problem statement, all variables and given/known data

    Let vector E = (10 i + 1 j) and vector F = (5 i - 5 j). Find the magnitude of F

    2. Relevant equations
    I thought it would just be 5^2 - 5^2 which equals 25-25, all square rooted.

    3. The attempt at a solution
    I keep getting 0 but it's not right. Help?
  2. jcsd
  3. Sep 19, 2010 #2
    Nevermind, got it!
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