1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    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!

Homework Help: What does the i^ and the j^ symbol mean?

  1. Oct 28, 2007 #1
    [SOLVED] Quick question..

    What does the i^ and the j^ symbol mean?
    A particle moves from A to D in the figure while experiencing force http://img249.imageshack.us/img249/4294/renderet0.gif [Broken]. View Figure How much work does the force do if the particle follows path (a) ABD,(b) ACD, and (c) AD?

    I just want to know that before i start the question.
    Last edited by a moderator: May 3, 2017
  2. jcsd
  3. Oct 28, 2007 #2


    User Avatar
    Staff Emeritus
    Science Advisor

    In this sense, i and j refer to the unit vectors in the x and y directions, respectively. So, the vector 6i+8j is identical to the vector (6,8) using "normal" notation.
  4. Oct 28, 2007 #3
    thanks a lot! The question was a breeze after you explained that. Just had to find the dot product to find the work done.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook