Sorry if this sounds ignorant, but why is your friend transferring? Is BSc better at UNSW than at USyd? Sorry, I am not sure about wether the units will transfer.
Both masses are accelerated, one up and one across, but both have an acceleration of a. Since it is a pulley system, they both have the same acceleration. Let their acceleration be a. Two equations can be set up for this, one for the 5kg block and one for the 8kg block.
So let m1 (the mass of...
I can explain the mechanics question if you tell me what it was about. I'm majoring in physics so I should be able to link you in the right direction. :)
considering your in Year 10 and haven't started physics that would be a very good achievement! :) Don't be discouraged, it sounds like the test was hard for everyone!
The cut-offs for the olympiads depend on how hard the test is. In 2010, the cut-off for chem was around 40% or 48/120, and in 2011 it was much higher around 70% or 84/120. So the approximate cut-off each year is around 50-60%. The bio cut-off is higher I think.