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!

Scalar product of position vectors

  1. Feb 28, 2009 #1
    Last edited by a moderator: May 4, 2017
  2. jcsd
  3. Mar 1, 2009 #2

    CompuChip

    User Avatar
    Science Advisor
    Homework Helper

    Suppose, in general, that you have a function f(t). How do you find its minimum and maximum (i.e. the extrema)?

    [Hint: it involves differentiation]
     
  4. Mar 1, 2009 #3
    find values of t for f'(t) =0

    I dont understand the significance of r.r, however.

    Thanks
     
  5. Mar 1, 2009 #4

    CompuChip

    User Avatar
    Science Advisor
    Homework Helper

    Well, r is the vector that describes the difference in position.
    r . r is the square of its length. So the square of the distance between the particles.

    Note that minimizing (maximizing) the distance is equivalent to minimizing (maximizing) the square of the distance.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Scalar product of position vectors
Loading...