Re: force


significant zero wrote:
> | > sue wrote
> |
> | Sigh...
> | Children !!!
> | Charles, Camilla, Dubya, Browine and Sig z :o)
>
> I wish.
>
> | <<Forces always come in pairs - equal and opposite
> | action-reaction force pairs.>>
>
> Is that why we have pairs of bolloxs miss ?
>
> | http://www.glenbrook.k12.il.us/gbssci/phys/Class/newtlaws/u2l4a.html
> |
> | Sue...
> |
> A field is a condition ( even if it has a pair of bolloxs in it ) that
> can exist on its own and the force that is the product of this field
> can be considered as a single entity, What we teach our kids today no
> wonder we are nearly extinct !! (:-)

A field is a spatial abstraction. You teach your children that it can
exert force when you don't really know the answer to
' why do things fall down instead of up?' .

The princple is much the same as what you tell childeren when
they ask where babies come from. ;-)

<< So, despite Einstein's hopes, general relativity
does not in any way explain or obviate the principle
of inertia. Granted, if the field equations didn't
include the trace term (so that the covariant divergence
didn't vanish), the resulting theory would have many
problems and be subject to many objections, but no one
disputes that the principle of inertia is extremely
well-founded in observation. It is an extremely
well-justified postulate - but it is still a postulate.
General relativity does not explain inertia, nor does
it dispense with the need to organize our spatio-temporal
theories on the principle of inertia and the associated
coordinate systems. >>
http://www.mathpages.com/home/kmath588/kmath588.htm

Babies and bolloxs really come from here:
http://www.fz-juelich.de/zam/docs/autoren2002/gibbon

But don't tell the children or it'll spoil the H. G. Wells fable.

:o)
Sue...




>
> sig z

.

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