Thankyou all for your help... Everything is good now, rather annoyingly my teacher was doing it just because it had appeared on an exam like once in 20 years... Thankyou again.
I need to work out to dimensions that are derived from their fundamental units... I am having a small amount of trouble working out exactly how to do this...
eg: Force
Pressure
Energy (using W.D.= force x distance)
Thankyou for your time.