+ Reply to Thread
Results 1 to 3 of 3

Thread: Dot Product & Cross Product

  1. #1
    shermaine Newbie
    Join Date
    Jul 2003
    Posts
    548

    Default Dot Product & Cross Product

    Hello,

    May i know what cases to use dot product and cross product?
    Pls advise.
    Thanks.


  2. #2
    Super Moderator Nigel Goodwin Excellent Nigel Goodwin Excellent Nigel Goodwin Excellent Nigel Goodwin Excellent Nigel Goodwin Excellent Nigel Goodwin Excellent Nigel Goodwin Excellent Nigel Goodwin Excellent Nigel Goodwin Excellent Nigel Goodwin Excellent Nigel Goodwin Excellent
    Join Date
    Nov 2003
    Location
    Derbyshire, UK
    Posts
    29,754

    Default Re: Dot Product & Cross Product

    Quote Originally Posted by shermaine
    Hello,

    May i know what cases to use dot product and cross product?
    Pls advise.
    Thanks.
    If you google for +"dot product" +"cross product" you get plenty of hits, is there any electronic reason for the question?. Probably if you don't know which to use, you don't need them!.
    PIC programmer software, and PIC Tutorials at:
    http://www.winpicprog.co.uk

  3. #3
    daviddoria Newbie
    Join Date
    Jan 2003
    Posts
    384

    Default

    cross product yields a vector quantity that is orthogonal to both vectors that you crossed

    dot product yields a scalar quantity. a simple appliaction is work = F (dot) d
    F(dot)d = mag(F) mag(d) cos THETA

    so if you use that for work, you automatically get the component of the force that is doing the work (in the same direction)

    good luck

    david
    thanks,
    david

+ Reply to Thread

Tags for this Thread