Thankyou to all the people who replied ;-)

This is turning out to be *much* harder than I thought... Currently, the
ball approaches on of the magnets, accelerates to implausibly heigh speed,
and then ends up so far away from the magnets that is just demonstrates
Newton's 1st - it travels in a straight line forever. Bum!

Well anyway, at this point it was about 9pm, so I gave up and sulked off to
read a book instead. I haven't tried it again in light of the latest posts -
hopefully I might actually get somewhere! Well let folks know once I work
out exactly what's happening and can ask more *specific* questions.

Weary Andrew.

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