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!

Directional derivative

  1. Apr 19, 2006 #1
    Suppose I have a path [tex]\vec{r}(x,y)[/tex] and some vector [tex]\vec{a}(x,y)[/tex].
    Question is: how do I find the tangential and perpendicular component of a along the path r at a given point?

    For tangential component, I'd just take the projection of a on r with dot product (I guess this's correct). But what about perpendicular one?
  2. jcsd
  3. Apr 19, 2006 #2


    User Avatar
    Staff Emeritus
    Science Advisor
    Gold Member

    HINT: The dot product of two perpendicular vector lines is zero.

Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Similar Discussions: Directional derivative
  1. Derivative of (Replies: 5)

  2. Direct Current (Replies: 10)

  3. Vector direction? (Replies: 7)