Yesterday Sam and I finished filming my attempts to do the 2012 Physics Scholarship exam. There were some tough questions in there. I got on top of them, I think, with some careful thinking through the principles involved, which is a very good way to start when you are bemused by a question.
I'm sure Sam will get the movies uploaded onto physicslounge soon, to join the others. Hopefully some of you will find them useful.
Next, the calculus one. No! - only joking.