"Objects change their motion only when a net force is applied. Laws of
motion are used to calculate precisely the effects of forces on the motion
of objects. The magnitude of the change in motion can be calculated using
the relationship F = ma, which is independent of the nature of the force.
Whenever one object exerts force on another, a force equal in magnitude and
opposite in direction is exerted on the first object."
Larry Woolf
General Atomics
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Mail Stop 78-110
San Diego CA 92121
Ph:858-526-8575
FAX:858-526-8568 http://www.ga.com http://www.sci-ed-ga.org