2016 Official AQA New Spec AS Level Physics Paper 2 - 9th June 2016

I put acceleration and deceleration increases. Got no idea what is correct. I went to that conclusion from the equation F=ma.

still no unofficial mark scheme

That is eactly what I was thinking in the exam so I put the maximum velocity would have to increase.xD. I really don't know what the correct answer was now.

what do you guys think the grade boundaries will be for an A, B, C, D and E for both of the papers together.

Same bro.
Only because if the mass decreases and if you use newtons second law of motion and imagine that both eh braking force and thrust force are constant , you will realise that if mass decreases then acceleration has to increase in order to maintain the same thrust and braking force.

F = ma --> Imagine if F=5000N and m=500kg. then that means that a = 10ms^-2

but now if the mass decreases , but the thrust force stays the same then that means that acceleration must increase.

F = 5000N but m is now = 250kg then a = 20ms^-2

hence the answer must be that the acceleration must be higher as well as the deceleration too. But i mean you are making assumptions like the braking force and thrust force is constant every lap which is impossible. Tbh AQA are terrible with the MC questions :/

Does anyone know the answer to the multiple choice question about the car crashing. I can remember that the option were 83N, 830N, 8300N. 830000N. I can remember myself putting 83,000N as the answer but that was a guess.

Thanks.

Are the second set of specimen papers available from the AQA website? If so, I can't find them. If not, please could you post a copy of paper 1 too? Thanks

Well, the maximum velocity would still have to increase no matter what in order for momentum to be conserved also the driving force would have to change as mass has decreased anyway. In M5 mechanics we deal with systems of increasing and decreasing mass all the time and it's always solved using conservation of momentum.Although, I do agree with your reasoning. This question is so annoying, I just really want to know the answer-very poorly worded question!

Also , what did you put for the seisometer question? Did you talk about how the pattern produced would correspond to the amplitude and frequency of the wave? I was completely confused by this question and no one in my class answered it from those I've spoken to!

Does anyone know the answer to the multiple choice question about the car crashing. I can remember that the option were 83N, 830N, 8300N. 83000N. I can remember myself putting 83,000N as the answer but that was a guess.

Thanks

i have set 2 specimen if thats what u want??

Well it depends on how the whole nation did. I mean AQA are gonna be generous apparently when they mark our papers. Also its the new spec so they might put a bit of a ease on the boundaries too.

Im guessing that :

A - 90
B - 78
C - 66
D - 50
E - 39

I mean have you guys looked at The grade boundaries for Physics B last year?
43/70 for an A and 33/70 for an A. AQA can go really low XD

Yep, please

Yeah that was correct. if you managed to calculate it the exact answer was 83333.3N

car had a mass of 500kg and moved at 10ms^-1
"crumpled" a distance of 30cm? ===> 0.30m

the Impulse on the car is 5000Ns as the velocity when it crashes is 0ms^-1
Since I = F x t

we need time so we use suvat
s = 0.30
u = 10
v = ?
a = ?
t = t

therefore if u use s = 0.5(u+v)t


then you will get t = 0.06

then I = F x t

F = 5000/0.06
F = 83333.3N


and all for 1 F**king mark

Yeah good point. same lol. You went up to M5?! thats really good.

When i read that question , all that came to my mind was oscillations XD. yeah i kinda wrote the same thing , It thought of mechanical waves and transverse waves lol because the pen kinda acts like a particle. It vibrates "Quickly downwards" (S-waves) so it vibrates perpendicular to the direction of motion in some sort of way XD

I think physicsmathstutor has uploaded model answers for the paper, but the papers are password protected,not sure if they're AQA either. I have emailed asking for it, so hopefully we can get the answer lol. I let you know if I hear anything.
Best of luck and thanks for all your help!

there you go