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Trinity News : July 2010
truss busters on your bike! ENGINEERING EXPERIMENTS FROM OUR RESIDENT EXPERT! Each year, Year 12 Engineering Studies students, as part of their Engineering Application Module - Civil Structures, design and ‘bust’ trusses. The aim is to make compression members as short and as rigid as possible and tension members longer and lighter. Of course accuracy in construction is critical, with results and faws needing to be recorded and analysed. This proves to be an exciting and valuable practical opportunity for the boys as they enter the HSC Course and also forms an integral part of their Civil Structures Engineering Report. Needless to say, 120kg plus crashing to the ground causes many a heart to futter! As part of the Preliminary Course in Engineering Studies students study Simple Machines. A fun lesson is always had in looking at the effciency of a bicycle. Calculating this effciency frst involves calculating the velocity ratio and the mechanical advantage or disadvantage of the bike. The effciency is then found by dividing the mechanical advantage by the velocity ratio. Bicycles are always highly effcient and according to our calculations, my bike is 96% effcient! So the message for the whole of the Trinity Community is right there in our fndings, Get on your bike! Michael Sherrie (12La) tests his truss MR MICHAEL SPRATT OFTEN OFFERS INTERESTING EXPERIENCES IN ENGINEERING TO HIS STUDENTS. HERE ARE TWO OF THEM: TRINITY NEWS 13