Definitely start with the easier questions first, if you have done the vcaa exams in the order of 2008, 2009, 2010 you would have noticed much harder questions especially relating to energy, tension and pulley systems as the years progress. These questions take time. More time than the one mark a minute.
It is important to realize that the one mark a minute rule doesn't really work because of all the extended questions and written explanations, you should rather aim to finish a section like this. If the electronics section has 35 marks, it should be completed in no more than 35 min altogether.
If this approach is taken your time will be spent more efficiently on the paper. Motion should always be attempted last if anyone is uncomfortable with it simply because tackling the hard questions first may not work. You may say to yourself that I'll do the hard questions first but, if you can't solve them you will be lost as what to do, you will be flicking through the paper wasting time on deciding what to do.
Attempt easy questions to harder that the way I'm going.
