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Homework Help: A Vector question

  1. Sep 3, 2010 #1
    1. The problem statement, all variables and given/known data

    If vector A = a( 3.0i + 4.0j) , where a is a constant, determine the value of a that makes A a unit vector.

    2. Relevant equations

    3. The attempt at a solution

    I thought the answer is 1/5, since a unit vector has a magnitude of one therefore you need to divide it so that the magnitude of the vector equal to one.
  2. jcsd
  3. Sep 3, 2010 #2


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    Homework Helper

    It is correct.

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