Cross Product

Discussion in 'Homework Help' started by mo2015mo, Jun 30, 2013.

  1. mo2015mo

    Thread Starter Member

    May 9, 2013
    157
    1
    HI guys :) ,

    I have been having problem with the attached question,

    i can solve the first situation from my problem
    otherwise, i can't solve them due to presence negative sign !!!!...

    Is there any way to solve It clearly??
     
  2. WBahn

    Moderator

    Mar 31, 2012
    17,788
    4,808
    If c = a x b, then in terms of c what are

    -a x b ?

    a x -b ?

    -a x -b ?

    Either work them through explicitly or use the right hand rule.

    Now apply this to your problem.
     
    mo2015mo likes this.
  3. mo2015mo

    Thread Starter Member

    May 9, 2013
    157
    1
    I Don't understand
    i Don't understand this method
    I want to clear explanation with examples...
     
  4. WBahn

    Moderator

    Mar 31, 2012
    17,788
    4,808
    Vectors:

    a = ax*i + ay*j + az*k
    b = bx*i + by*j + bz*k

    What is (a x b)?

    If you can't do that, then you need to go learn what the cross product is and how to take one.
     
    mo2015mo likes this.
  5. mo2015mo

    Thread Starter Member

    May 9, 2013
    157
    1
    i can solve it
     
  6. WBahn

    Moderator

    Mar 31, 2012
    17,788
    4,808
    Good! Glad you got it.
     
    mo2015mo likes this.
  7. mo2015mo

    Thread Starter Member

    May 9, 2013
    157
    1
    :) :) :) Thank you once again
     
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