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Homework Help: Vector Components

  1. Jan 19, 2009 #1
    1. The problem statement, all variables and given/known data

    The components of a vector V are often written (Vx, Vy, Vz). What is the z component of a vector which is the sum of the two vectors, V1 and V2, whose components are (2.61, 1.72, 0.00) and (3.84, -4.54, -1.90)?

    b) Calculate the length of this vector.

    2. Relevant equations

    3. The attempt at a solution

    Okay so for part A, I got -1.90 (vz1 + vz2) and that is correct.

    Part B? I don't understand how to do it.

    Thanks for the help!
  2. jcsd
  3. Jan 19, 2009 #2


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    For part B, think about Pythagorus....in 3D.
  4. Jan 19, 2009 #3
    Got it.. Thanks!
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