Don't understand Q 1.2 on the first paper of the second set of specimen papers... mark scheme says "Total energy = 2keV + 2 × 511 keV = 1024 keV" but I have no idea where this comes from? Think I'm being stupid...
I just did the first paper from the second set, I got 34 :,( Am I retarded or is this the case with everyone?
It is stupidly hard... can't even figure out some of the answers from looking at the markscheme. Anyone understand 4.1? Looks like an easy question but I can't get my head around it.
Where the hell does 245000N come from... don't even understand
I don't think the answer relates to the question - question is about a car but answer is about a rocket. I make answer to 4.1 : Resultant force = ma =11000 x 2.9 = 31900N Resultant force = thrust - air resistance so air resistance = 230000 - 31900 = 198100
Where the hell does 245000N come from... don't even understand
Apologies, I forgot to mention that the mark scheme answers for 4.1 and 4.2 are incorrect (which shows how much effort really goes into these specimen papers :/).
Apologies, I forgot to mention that the mark scheme answers for 4.1 and 4.2 are incorrect (which shows how much effort really goes into these specimen papers :/).
These papers are an absolute joke in my opinion. Just did Paper 1 on the second set of specimen papers and was lost throughout... The question about moments was impossible and also the one about working out time taken for p to fall. Just look at the mark scheme for those 2 questions it would be virtually impossible for me to even get a mark on those questions.