[Smiley Face :)]

also I know you don't like estimating grade boundaries, but what do you think that the grade boundary will be for this paper... and do you think it was hard?

[Mr M]

(Original post by Smiley Face :))
also I know you don't like estimating grade boundaries, but what do you think that the grade boundary will be for this paper... and do you think it was hard?

I can't guess really. It felt about the same as usual to me. There was nothing peculiar like the block that magically split in half from a year or two ago anyway!

[Smiley Face :)]

(Original post by Mr M)
I can't guess really. It felt about the same as usual to me. There was nothing peculiar like the block that magically split in half from a year or two ago anyway!

Cool, plus could you answer my previous question? Also thanks for the ppts and the old exams!!! Really helped me out!

[Nathan1234]

hi,
for the very last question,7, i didn't divide by 0.5 so got half for the following questions, because i got 1.55m/s, if i get ECF how many would i get.
thanks

[Mr M]

(Original post by Nathan1234)
hi,
for the very last question,7, i didn't divide by 0.5 so got half for the following questions, because i got 1.55m/s, if i get ECF how many would i get.
thanks

I expect you will just lose 1 or 2 marks in part (i)

[tooambitious]

When we had to work out mew for P I got friction right but incorrectly resolved for the reaction, did everything else right, how many marks do you think I'd lose? Grazie

[preeyen]

her MR.M, for question 5
i) i got t=3.82,m=1
ii)change in momentum = 0.735
iii) greatest height = 0.249

How many marks would i have lost and will i get an error carried forward mark?

[Little Wing]

(Original post by Mr M)
Mr M's OCR (not OCR MEI) M1 Answers May 2012


1. (i) F = 15 N and angle = 61.9 degrees (4 marks)

(ii) E = 17 and angle = 118 degrees (2 marks)


2. (i) v = 3.08 m/s and s = 2.016 m (4 marks)

(ii) 2.669 m (4 marks)


3. (i) 1.6 (2 marks)

(ii) 12.6 m (5 marks)


4. (i) Show coefficient (4 marks)

(ii) 6.02 m/s (6 marks)


5. (i) T = 4.9 N (3 marks)

(ii) 0.49 Ns (5 marks)

(iii) 0.248 m (5 marks)


6. (i) m = 0.500 kg (2 marks)

(ii) H = 10.5 N (2 marks)

(iii) Show coefficient (6 marks)

(iv) Yes (3 marks)


7. (i) 3.1 m/s (3 marks)

(ii) (a) 3.1 (1 mark)

(b) 0.903 m (4 marks)

(c) -1.8 metres per second squared (3 marks)

(iii) 1.415 m/s (4 marks)

Hey Mr M!
For question 5 I had the right method but ended up getting the wrong mass, and this error was then carried on throughout the rest of question 6, how many marks will I lose for the whole question. (I'm pretty sure my method was completely correct).

Thanks!

[Mr M]

(Original post by BenjaminKyle)
how many marks would be lost in 5iii) for forgetting to multiply the distance Q has moved downwards by 2 for the distance P has above the surface at the point Q hits the ground - (I then proceeded to correctly work out the new acceleration of P and added on the extra distance) i.e. adding 0.11025 and 0.02756... instead of (2x0.11025) and 0.02756... and getting the correct answer of 2.38.

drop 1 mark

[Nathan1234]

(Original post by Mr M)
I expect you will just lose 1 or 2 marks in part (i)

thanks, but what about the following questions?

[Next Level]

cheers for the answers mr m! made some silly mistakes tho:

For 3)(ii), I worked out the distance of B to be 8m (area of triangle), but stupidly for A I worked out the distance as 3.6m (area of the trapezium, not the rectangle underneath), and since it was 1m behind B I just did 7 - 3.6 = 3.4m as a result for my answer, how many out of 5 will I lose for this?
7)(ii)(c) For the acceleration, instead of differentiating that equation I just used the suvat equation without realising that acceleration was not constant, how many out of 3 marks will I lose for this?

thanks!

[Mr M]

(Original post by Smiley Face :))
Hi sir, if for q 3 iii I forgot to +1 .. but got 11.6m how many marks do you think I will lose and also 6iii... If I got r = 22.6 and then used my answer to work out Mew to be 0.821... How many marks do you think I will lose?? thanks sir

Drop 1 mark for q3.

Not sure about the other one as you haven't told me anything you did right.

[Smiley Face :)]

(Original post by Mr M)
Drop 1 mark for q3.

Not sure about the other one as you haven't told me anything you did right.

ok, thanks sir

[gpsmith26]

I know it's difficult to judge, but obtaining 11.6 for 3ii) then subtracting 1m, how many marks would be lost, thanks

[Smiley Face :)]

(Original post by Smiley Face :))
ok, thanks sir

Would it be to safe to say around 56 is an A...
so 64 should be around 85 UMS??

[Fusionary]

Mew?

[Mathlete 4 the win]

Hello, I am sorry if this has already been asked but can't see it in this thread.....
for 3) ii) the sprinter question, I worked out both areas ok but then minus 1 instead of plus for the final distance so I got 10.6m instead or 12.6m do you reckon I'll lose a few marks for that or only a couple?
thanks

[Mr M]

(Original post by tooambitious)
When we had to work out mew for P I got friction right but incorrectly resolved for the reaction, did everything else right, how many marks do you think I'd lose? Grazie

This is a bit vague - lose 2 or 3?

[Mr M]

(Original post by gpsmith26)
I know it's difficult to judge, but obtaining 11.6 for 3ii) then subtracting 1m, how many marks would be lost, thanks

Lose 1

[KH3HR]

Here are my mistakes:

1. (i) I know the answer was 15N, but i think i might have stupidly put 17N out of habit because it was resultant, got the angle right though

3. (ii) Did everything else ok but I forgot about the + 1 and got 11.6m

6. (ii) I included Tsin40 but not the T and got 4.11N

7. (ii)(a) I put 3.1m/s rather than 3.1 (Will i still lose marks?)
(iv) I put 1.42m/s (3 S.F)

Does anyone have any idea how much marks i might have lost? Anyway, i think i did ok but was a hard paper i thought. The graph question was, to me, one of the hardest they've done and when i saw question 6 at first glance my soul left my body