OCR M1 - 31st May 2012 :)

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Great solutions, thanks for posting.
I may be wrong but....
I think 5.) (iii) where you're finding the height of the mass above the ground might be slightly less then it should.

As you have found the distance that the more massive mass travels before hitting the floor, I think you need to multiply this by 2 as the less the massive mass travels an equal distance upwards away form the floor.
So final height should be
H = (0.11025) X 2 + 0.0275625
H = 0.2480625 metres
EDIT: what they said ^^

(edited 11 years ago)

Reply 661

Anon 17

^^ The questions Mr Ward got wrong have already been acknowleged above.

^ PreciseUrination: I'd assume one, maybe at most two marks (one for not counting it, one for an incorrect answer).

Reply 662

charliebick

Original post by ward309

Here are the full worked solutions.

Mr Ward
Belgrave High School

Hi, If i didnt double the 0.11025 on question 5(iii) like you did, how many marks will I lose? got the same answer as you for that one.

Reply 663

As_Dust_Dances_

For 5iii) I got 0.137 :/

Reply 664

seamen

Original post by charliebick

Hi, If i didnt double the 0.11025 on question 5(iii) like you did, how many marks will I lose? got the same answer as you for that one.

somebody said on the previous page that it was 1 mark.

Anyone have any idea how many marks I would lose for 7 iii when I worked out velocity to be 2.83 but being the idiot I am I wrote down 2.81 for the momentum bit (but I did write v=2.83 from the V=3.1-3t^2) and eventually found out velocity to be 1.405 and rounded it to 1.41.

Reply 665

wilky94

Original post by As_Dust_Dances_

For 5iii) I got 0.137 :/

I got the same :frown:

This was posted from The Student Room's iPhone/iPad App

Reply 666

As_Dust_Dances_

How many marks would you lose if for qu 2ii) I did u=7 t=0.9 a=-9.8 and s=s then got an answer of 2.331? I think I forgot about the downwards distance...

Reply 667

tahseen1995

Original post by wilky94

I got the same :frown:

This was posted from The Student Room's iPhone/iPad App

I'm guessing it's because you forgot to double 0.11025 before adding on that extra distance at the end

Reply 668

Luppy021

Original post by Choppyy

Looks like 50/72. I'm fuming. Pressure on the C4 exam now!

I feel I got around that too, at least you have got 3 weeks to revise for C4, did you do C3 in january? :wink:

Reply 669

ward309

Original post by charliebick

Hi, If i didnt double the 0.11025 on question 5(iii) like you did, how many marks will I lose? got the same answer as you for that one.

one mark

Reply 670

hjenkins6

Original post by WildBerry

Any idea what 50/72 would be ?

Forgot the sign for the last acceleration , and messed up the one where it 'stays' in equilibrium as I said it wouldnt ffs as I calculated the friction force wrong.

i think its probably a B :smile:

Reply 671

kenann

Original post by wilky94

I got the same :frown:

don't feel bad man, i got the method roughly right on all the questions but my answers were mostly wrong :frown:

it makes me upset to see so many confident, smart people on here answering everybody's questions when i did pretty bad myself

Reply 672

Anon 17

^ I wouldn't worry about comparing yourself to people on TSR. This is a community of what I'd say is generally the higher end of the student world, so on here almost everyone will find plently of people smarter than them.

Reply 673

710

These exams from OCR this Summer have been a real turn-up for the cards; exams are changing. Let's hope for good grade boundaries. Fingers crossed.

Reply 674

PreciseUrination

You probably did a lot better than you think. Working marks can often you get you full marks [-1] or [-2].

Reply 675

Tulian

Original post by 710

These exams from OCR this Summer have been a real turn-up for the cards; exams are changing. Let's hope for good grade boundaries. Fingers crossed.

Whereas Edexcel do the same thing year in year out. Nothing challenging in their papers.

Reply 676

Nathdragon5

Original post by Anon 17

I totally agree guys, there's always people better than you. If people generally thought it was reasonably hard (as seems the consensus) on tsr, then I guess that most people found it was very hard. To be honest, the people doing further maths at my school (and therefore doing m2 this year) found m1 predictably easy having had experience with m2 and therefore got more used to m1, however, the vast majority of people who were just taking m1 this year found it extremely difficult. Rest assured, there won't be high grade boundaries.
Be confident :smile:

remember the high amounts of marks available for working too, and that there is error carried forward :smile:

Reply 677

FDR

I reckon I've got 64-66/72, depending on working marks.

I'm glad it's over, I can't stand Mechanics, roll on C4! What to do people think the grade boundaries will be?

Reply 678

FDR

Original post by Nathdragon5

remember the high amounts of marks available for working too, and that there is error carried forward :smile:

I agree, it was a difficult paper, however I feel that with there being two 'show that...' questions, they may set the grade boundaries higher than they otherwise would.

I really do hate the concept of UMS though - why can't they just ensure that every paper is as hard as the other, and make it a set mark to get an A, or a B etc (e.g always 58 for an A..)