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How to find direction from gradient?

  1. Mar 18, 2013 #1
    1. The problem statement, all variables and given/known data
    if f(x,y,z) indicates electrical charge in the water at position(x,y,z) and
    the gradient is <12,-20,5>, in which direction should the shark swim to find its prey?


    2. Relevant equations



    3. The attempt at a solution
    is the answer in the direction of <12,-20,5>
    im little confused when gradient is given and how to find direction? do i find unit vector of gradient or something?
     
  2. jcsd
  3. Mar 18, 2013 #2

    BruceW

    User Avatar
    Homework Helper

    Yeah, the question is not very clear. I would guess that you have the right answer. Or maybe they want the unit vector, as you say.
     
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