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!

Cross Product

  1. Oct 9, 2005 #1
    I have two vectors A = 2x + 3y - 4z and B = -6x - 4y + z. The problem asks me to find the component of A X B along the direction of C = x - y + z. So I did put A and B into a matrix, but I didn't get the correct answer, which is -14.4. What am I doing wrong?
  2. jcsd
  3. Oct 9, 2005 #2


    User Avatar
    Homework Helper

    First, find the vector D = A X B.
    Then find the unit vector in the C direction.
    Finally dot D with the unit vector of C.
  4. Oct 9, 2005 #3
    I got -15 instead of -14.4 (the answer from the back of the book). I am not sure why it's a little off.
  5. Oct 9, 2005 #4


    User Avatar
    Homework Helper

    I can only suggest an algebriac mistake.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Similar Discussions: Cross Product
  1. Cross Product? (Replies: 17)

  2. Cross Products (Replies: 6)

  3. Cross Products (Replies: 3)

  4. Cross product (Replies: 3)