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Homework Help: Vector Addition of Components

  1. Jan 29, 2016 #1
    1. The problem statement, all variables and given/known data

    Given the following vector components of vectors C and D:
    Cx = 8.10, Cy = -5.40, Cz = -7.90, Dx = 4.40, Dy = -2.50, Dz = 4.50,
    find the x, y, z components of their sum.

    2. Relevant equations

    No relevant equations that I know of....

    3. The attempt at a solution

    I am lost completely. I do understand using (x,y) components, as well as use of the Pythagorean theorem for right triangles, etc....
    The z component is throwing me off completely. Do I use the (-) as an indication of direction? Does Z represent a hypotenuse?
    Im so confused.
  2. jcsd
  3. Jan 29, 2016 #2


    User Avatar
    Education Advisor
    Gold Member

    Z represents that you're working in ##\mathbb{R}^3##, do you know what this means?
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