Follow the link and look at "If penguins could fly." Peter, can you work out the equations of motion for these?
Jack http://search.bbc.co.uk/cgi-bin/search/results.pl?tab=av <http://search.bbc.co.uk/cgi-bin/search/results.pl?tab=av&q=penguins&recipe= all&scope=all&edition=> &q=penguins&recipe=all&scope=all&edition=
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