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Quick easy question

  1. Sep 18, 2010 #1
    1. The problem statement, all variables and given/known data
    Okay, im just trying to find out what (i) means in this guys work!

    Check attachment!

    its says somewhere 3.86 N(i) is that initial?
     

    Attached Files:

  2. jcsd
  3. Sep 18, 2010 #2
    Ah okay i think its just a variable to keep track where it came from
     
  4. Sep 18, 2010 #3
    Nah, he saying i as in [itex]\hat{i}[/tex] (there should be a hat on the i...), i.e. the vector component in the i unit vector direction (sometimes also x). It's typical for people to write unit vectors as x->i y->j and z->k.
     
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