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!

Homework Help: Does 'extended' mean 'larger' in this case?

  1. Sep 8, 2007 #1
    For the Principle of Superposition wrt Gravitational forces....

    In my text it says that for particles [tex]\vec{F_{1,net}}=\sum_{i=2}^n\vec{F_{1,i}}[/tex]
    and for real or "extended" objects [tex]\vec{F_1}=\int d\vec{F}[/tex]

    Does extended just mean larger?

  2. jcsd
  3. Sep 8, 2007 #2


    User Avatar
    Science Advisor

    It means more than just a single point. The sum is over a group of "point" particles. The integral is over some interval. Basically, that is what "extended" means here: a whole interval or area or volume, no matter how small, rather than individual points.
  4. Sep 8, 2007 #3
    Gotcha. Thanks. I just wanted to make sure it did not mean "distant".
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook