En Wed, 05 Sep 2007 06:45:29 -0300, Grzegorz Słodkowicz <jergosh@wp.pl>
escribi�:

> I believe vectors can only be added if they have the same point of
> application. The result is then applied to the same point.

You are talking about "forces", not "vectors" in general. Using the "point
of application" is just a convenient way of condensing two things: the
resultant force -a vector- and the resultant momentum -a pseudovector-
into a single entity, and only makes sense for a rigid body.

--
Gabriel Genellina