Techie, I used 9.81ms-2 and v^2=u^2 +2aS to come up with mine, using your figue for terminal velocity. Surely the science teacher who started this thread can solve it, but suspect he's to busy having his car burnt out by the adoring li'l uns... Oh, no wait, CCF, means he's posh right
Abeaumont, which science and which CCF (or a general area if you don't fancy it!)