1. PF Contest - Win "Conquering the Physics GRE" book! Click Here to Enter
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

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


    User Avatar
    Homework Helper

    It is correct.

Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook