Arsey's Edexcel M1 Summer 2013 Model Solutions BOTH PAPERS

So 2-4 for the entire moments Q? Including part B?

for first part, I'd say in total maybe 6-9 if your method is sufficient

Okay thanks, and 2-4 for Q2 as well?

The tension one I got something like 7.6N and 8.4N. Not sure which one for which.
The one with the two balls, I got about 2.8s and about 17.2 m

You remember what you got?


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Ahh not exactly. I have a feeling all my answers are wrong that's why I've been looking for a markscheme but everyone seems to be only talking about the paper that Arsey put up.

I think for question 2 the tensions were 7.something and 8.something and according to some people the R for question 7 was 1700(or something close).

I found the first question. I don't know why I couldn't get the answer, I tried double checking with the total momentum equation but it didn't work so I know I'm definitely wrong there. Think one of the speeds for the particles in question 1 was -2m/s

And the mass, again according to some people, was 20.something?

Thank you!!! Sorry, your answer at first was fine, but I just wanted to see if an answer from another source would match it for added comfort. Seeing as you've got that directly from a mark scheme I feel very comfortable, thank you!!!

Oh my god I feel so annoyed now, for the lift I should've done that -.- cheers for the clarification lol...

That's a little bit weird isn't it... you don't even have to be sure about the correct solution to get full marks, just write down every possible solution that comes to your mind

This is what I remember (may not be correct):
Q1) Balls colliding - 14Ns and 1.33 something
Q2) Ropes to attached to ceiling - T = 7.xx N and 8.xx N
Q3) Some pulley stuff - T = 26.1 N
Q4) Something about friction - coefficient = 0.411
Q5) Some balls being thrown - t = 2.xx s and h = 17.7 m
Q6) Vectors - time = 2h?, distance (or was this the speed?) = 8.xx km
Q7) Towbar - 1.02 ms-2, T = 517 N, R = 1750 N
Q8) Moments - x = 0.6 and m = 23.5kg

I thought the towbar question was hardest, really doubtful about that one.

Fair enough.





It is a bit silly I think!

Hey usy, anything on Error carried forward marks? If wrong mass was calculated and used throughout the other parts but correct method (if you used to right mass you would have got right answer) are M1 still awarded?

I think n might have been about 3.5 (not sure). I think you just needed to equate the i and j components, of both s and t (position vectors of the ships after t hours)

I would like to know this also as I did SUVAT wrong for the motorbikes time but then used that time to calculate the acceleration which was also wrong

I'd say that's an A. because Jan 2013 paper was significantly easier than this one, and an A was 64 marks then. So yeah you've definitely scored yourself an A, well done!

It was conditional moments, some people didn't know the exact objective to get both of them, I knew it was simultaneous equations but I had to take moments 3 times to finally get something that makes sense

Looking at previous official mark schemes, it states to the examiner award M1 marks wherever the correct method is used and if you used SUVAT formula to get a you'd get M1 marks but not A1 marks. Not sure need confirmation from another source really.

SUVAT was my downfall, Where do you reckon 90ums will be ? I think I got 64/65 out of 75

Thanks so much arsey, really appreciate you doing this for all the maths papers

I nailed this paper apart from question 5, I made a stupid mistake when calculating t, I forgot to times the last triangle by its height, so I lost some values.

I also messed up the second part of 5, but I stated that you had to take 10 seconds off the amount of time that the car took.

My equation for t was

22x30 + 22T + 1/2(90-T) = 2145 (forgot to times by 22 on last bit)
Will I get at least a mark for the set up ?

and maybe 1/6 for part c and d for stating how I had to find T of car and minus 10? so a total of 2/9 for that question? or 4/11 considering I got the speed time graph right?

last part of Q8) Direction = southwest? should be right?

Personally I don't see why people are freaking out about this paper, I wouldn't say it was hard, and I wouldn't say it was easy, the questions were very standard, and not harder than other past papers. People will look back at this paper and not really think it was hard and easy, just another paper, thats my opinion.

M1 boundaries seem to be consistently high, so I'd say it's hard to judge.
Lots of people say it was hard, including people from my school.
I would think 62/75 = 80 UMS 68/75 = 90 UMS and 74/75 = 100 UMS, I still dont agree that it was harder than January, I didn't sit january but did the past paper and they were fairly equal so it's hard to judge, although january performances seem to be better than june performances due to june being first time takes and more people taking them who are less experienced etc

Nope, you actually gain full credit if one's correct.

Last January's markscheme:

If a candidate makes more than one attempt at any question:
• If all but one attempt is crossed out, mark the attempt which is
NOT crossed out.
• If either all attempts are crossed out or none are crossed out, mark
all the attempts and score the highest single attempt.