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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


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    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".
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