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# AQA Mechanics 1B 24 May 2012 Unofficial Markscheme Tweet

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1. Re: AQA Mechanics 1B 24 May 2012 Unofficial Markscheme
(Original post by EAP)
think i got a,b,d and e right. but i got the big six marker wrong earlier and part c wrong here. other than that i think i got all the other answers right but i may have used the wrong methods haha oops im gonna say i probs got about 64/65 out of 75. Reckon that will get me an a ?
definitely! rarely goes higher than 63 for an A in single maths
2. Re: AQA Mechanics 1B 24 May 2012 Unofficial Markscheme
For the assumptions question, would I get a mark for saying that tension is equal throughout the string?
3. (Original post by CreativeSkyline)
For the assumptions question, would I get a mark for saying that tension is equal throughout the string?
I wrote this too. I think you will get marks for it...

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4. Re: AQA Mechanics 1B 24 May 2012 Unofficial Markscheme
(Original post by CreativeSkyline)
For the assumptions question, would I get a mark for saying that tension is equal throughout the string?
I wrote this too,
5. Re: AQA Mechanics 1B 24 May 2012 Unofficial Markscheme
NOOOO for 8d i had 3.45 then i changed it so i mad the y=5 and got the time 4.7 something !! how many marks will i have lost for that ???
6. Re: AQA Mechanics 1B 24 May 2012 Unofficial Markscheme
and how many marks would i loose for rounding up the the reaction force to 118 in question 5bii
7. Speaking to my Maths teacher today, she thought the exam would have grade boundaries typical of what we've seen for the past few years, however, they might dip by one or two grades.

Personally, I think it will be two or three marks higher than January 2012's exam for each grade. So, as it was 59 for an A in that exam, I think it'll be like 61/62 for an A in this exam.

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8. Re: AQA Mechanics 1B 24 May 2012 Unofficial Markscheme
(Original post by Kenyan)
and how many marks would i loose for rounding up the the reaction force to 118 in question 5bii
i did that, you are always supposed to round to 3dp anyway so you would lose a mark for not doing it
9. Re: AQA Mechanics 1B 24 May 2012 Unofficial Markscheme
(Original post by Kenyan)
and how many marks would i loose for rounding up the the reaction force to 118 in question 5bii
None, the answer should be 118N, as it states on the front of the paper all answers should be given to 3sf, unless otherwise stated in the question, which it wasn't.
10. Can someone post the marks for each question (I mean sub questions as well )

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11. Re: AQA Mechanics 1B 24 May 2012 Unofficial Markscheme
(Original post by Kenyan)
and how many marks would i loose for rounding up the the reaction force to 118 in question 5bii
Definitely none, 12gN, 117.6N and 188N

(will be the allowed answers, i think you might of had to include units)

you didnt have to include units
Last edited by AndyHoughton; 31-05-2012 at 17:58.
12. Re: AQA Mechanics 1B 24 May 2012 Unofficial Markscheme
By the way for people who got 5.83 for the south-east question, how many method marks are we likely to pick up?
13. Re: AQA Mechanics 1B 24 May 2012 Unofficial Markscheme
(Original post by 1platinum)
By the way for people who got 5.83 for the south-east question, how many method marks are we likely to pick up?
I've asked this a couple of times and no one seems to know. It was out of 6 marks so possibly 2 or 3?
14. Re: AQA Mechanics 1B 24 May 2012 Unofficial Markscheme
(Original post by mojopin1)
I've asked this a couple of times and no one seems to know. It was out of 6 marks so possibly 2 or 3?
I reckon 3 sounds about right. It is difficult second guessing how they will mark!
15. Re: AQA Mechanics 1B 24 May 2012 Unofficial Markscheme
Direct from paper...
(c) State two modelling assumptions, other than those given, that you have made in answering this question. (2 marks)
doesn't mention block OR particle.

(c) Find the speed of the particle when it is travelling south-east. (6 marks)
Definitely 'travelling' south-east
16. Re: AQA Mechanics 1B 24 May 2012 Unofficial Markscheme
17. Re: AQA Mechanics 1B 24 May 2012 Unofficial Markscheme
(Original post by mojopin1)
Bump (last time).
18. Re: AQA Mechanics 1B 24 May 2012 Unofficial Markscheme
I would also like to see this
19. Re: AQA Mechanics 1B 24 May 2012 Unofficial Markscheme
On the last question does anyone remember what the initial velocity was? I seem to get t = 3.43 but i'm not sure what the initial velocity was so my working may be skewed.

Since 3.43, 3.45 and 3.46 are so close, do you think they'll award full marks for any of these?
20. Re: AQA Mechanics 1B 24 May 2012 Unofficial Markscheme
1 b is wrong i think, what does everyone else think
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