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Homework Help: Vector Problem

  1. Dec 11, 2016 #1
    1. The problem statement, all variables and given/known data
    Find the value of ez if e = 1/3i + 2/3j + ezk

    2. Relevant equations
    Any help?

    3. The attempt at a solution
    Have no idea where to start
  2. jcsd
  3. Dec 11, 2016 #2
    Can you tell us anything about this equation? What textbook are you using?
  4. Dec 11, 2016 #3
    Im currently studying for an exam and I found this in past papers. Im using no book atm.
  5. Dec 12, 2016 #4


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    My only guess is that e is supposed to be a unit vector. Any idea if that is right? If not, is it possible for you to upload an image of the question? You might be omitting a key detail which you do not realise is important.
  6. Dec 12, 2016 #5
    This is the exact question :" The vector e=1/3i+2/3j+ezk is a unit vector. Find ez?"
    The possible answers are 0,1,1/3 and 2/3
  7. Dec 12, 2016 #6


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    Do you know what a unit vector is?
  8. Dec 12, 2016 #7
    Do you know what it means for a vector to have a unit length (i.e. to be a unit vector)?
  9. Dec 12, 2016 #8
    Ahh I get you know. It has a magnitude of 1.
    Thanks so much
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