Rod Plunkett ([EMAIL PROTECTED]) writes:
>
......
> PS - Avery - "For every action there is an equal and opposite reaction" is Sir
> Isaac Newton's third law of motion.
How appropriate and how quickly I forget. It's the estimate of
velocity on impact of a falling head from Newton's second law that's used in
the design and testing of a bicycle helmet.
--
Avery Burdett
Ottawa, Ontario
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