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Vector direction determination

  1. Feb 8, 2014 #1
    1. The problem statement, all variables and given/known data
    If z = east and y = south, then x = ______?
    Select one:
    a. east
    b. up
    c. south
    d. north
    e. down


    2. Relevant equations



    3. The attempt at a solution
    using the right hand rule the answer i got is south is this correct?
     
  2. jcsd
  3. Feb 8, 2014 #2

    jedishrfu

    Staff: Mentor

    that cant be right because y is already south

    you know z=east so that -z=west and y=south so that -y=north so what else is left for x?
     
  4. Feb 8, 2014 #3
    really sorry i meant up is that correct?
     
  5. Feb 8, 2014 #4
    Yes. Rotating y into z gives x for your thumb.
     
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