(01-06-2010, 10:52 PM)interesting_signal Wrote: Here's my attempt at the 2000 paper, taking into account comments from PJW on my 2004 calculations.
I'm not sure that I have done enough for the stopping headway, as you can probably tell by my last paragraph. I still feel like I'm missing a piece of the puzzle. I'm also wondering how I'll get all this down on paper in the 20 minutes in the exam!
I have annotated and attached.
First thing to say is that you might find some comments "picky". Actually this is a very good sign; for the non-stop at least you did a good job. I have pointed out a few things that I wouldn't have mentioned if it was not otherwise so good, so take it as a compliment. If you had been struggling then I would have turned a blind eye (e.g. one is a repeat of something I noticed but didn't point out on your last paper), but since you have fundamentally "got it" then I have raised the bar a bit. The important thing initially was to get the engine running, now we can do a bit of fine tuning to improve performance and then we can move on to the sustained speed test of the exam.
Non stop headway
I think you have done enough to appease re your use of DGR method which is not the examiners' favourite methodology, apart from needing to amend diagram slightly to get rid of the potential bad impression that it might create otherwise.
In almost all other respects it was a model answer, but spoilt by two things:
a) a "silly" when talking about percentages. If an object sells for
PJW