scott <sco### [at] laptopcom> wrote:
> >> An object will remain at rest or will continue moving in a straight line 
> >> at
> >> constant speed unless an external force is applied.

> But if the audience is the general public, you should probably explain how 
> air drag, friction, gravity and things can all be external forces.

  Well, according to GR there's no such a thing as "gravity force", and
the correct form of the law of inertia is "...will continue moving along
its geodesic...". A geodesic is the shortest path between two points for
a given object.

-- 
                                                          - Warp

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