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# OCR M1!!!!!!!!!!!!!!!It's so hard +complicated watch

1. (Original post by hellooooo)
k u kno for questions like question 4? if you get the first bit wrong (worth 7 marks) but do the correct method for the questions leading on, you can get error carried forward marks yeh? but is it true you still cant get the maximum no. of marks for the rest of the question because you worked out the first but wrong?
From the general marking guidelines:

"The ֻ/` symbol implies that the A or B mark indicated is allowed for work correctly following on from
previously incorrect results. Otherwise, A and B marks are given for correct work only — differences in
notation are of course permitted. A and B marks are not given for ‘correct’ answers or results obtained
from incorrect working. When A or B marks are awarded for work at an intermediate stage of a solution,
there may be various alternatives that are equally acceptable. In such cases, exactly what is acceptable will
be agreed at the standardisation meeting."

also:

"When a part of a question has two or more ‘method’ steps, the M marks are in principle independent unless
the scheme specifically says otherwise"

So basically, if you did the second part correctly but with the wrong data from the first part, you will depfinitely get the 'M' (method) marks, but whether you get the 'A' (accuracy) marks depends on whether the examiner sees a little zigzag symbol in his mark scheme.
2. (Original post by gordon2002)
I thought the paper was out of 72 marks? Wasn't it?

yeh they have increased the overall no. of marks this year and have also made the papers longer. thats why some of the hard questions were worth 7 whereas before they might have been like 5?
3. here i am
question1 (i) because the ring is smooth. (that's it! my teacher said that definitely)

question4 i remember the question (says) first 0.8s 2m and next 1.2s 6m?
ok then,
s = u t + 1/2 a t²
2 = 0.8u + 1/2 a 0.8²
(6+2)=(1.2+8)u+1/2 a (1.2+0.8)²

these turn out to be
2 = 0.8u + 0.32a
8 = 2 u + 2a
you should know how to solve these, i get
u=1.5 a=2.5

and i always worrying about the units
eg the question asks for the value of P
should i just write the number? (because we do write the unit in China as well)
and sometimes it asks find K N or sth
i just keep writing out the units and then at the end add some brackets
eg P=10 (kg) K=5 (N)

what do you guys usually do?

anyway~ i got the last question last bit wrong~
it should be 1000~but i got 700
which because when i finding the acceleration~
it should be a=(25-16)/(500-200)
but i just use a=(25-16)/(400-200)
:withstupi
4. (Original post by Axisarsae)
here i am
question1 (i) because the ring is smooth. (that's it! my teacher said that definitely)

question4 i remember the question (says) first 0.8s 2m and next 1.2s 6m?
ok then,
s = u t + 1/2 a t²
2 = 0.8u + 1/2 a 0.8²
(6+2)=(1.2+8)u+1/2 a (1.2+0.8)²

these turn out to be
2 = 0.8u + 0.32a
8 = 2 u + 2a
you should know how to solve these, i get
u=1.5 a=2.5

and i always worrying about the units
eg the question asks for the value of P
should i just write the number? (because we do write the unit in China as well)
and sometimes it asks find K N or sth
i just keep writing out the units and then at the end add some brackets
eg P=10 (kg) K=5 (N)

what do you guys usually do?

anyway~ i got the last question last bit wrong~
it should be 1000~but i got 700
which because when i finding the acceleration~
it should be a=(25-16)/(500-200)
but i just use a=(25-16)/(400-200)
:withstupi
5. (Original post by Undry1)
indeed~

i just got it wrong...

question 4 alpha=14.77963163......degree
6. (Original post by Axisarsae)
indeed~

i just got it wrong...

question 4 alpha=14.77963163......degree
yeah i got the same answer (i think )
7. Paper was horrible.

Did any of you practice any questions on the rings prior to the exam? Our OCR Textbook has a total of about 2 questions about forces on a ring, yet we got two in one exam!

Compared with the past papers that was horrible.

Last part of Q7 i got 1000m, was so pleased when i check it with a buddy after the exam!

Question 4 was confusing, i think i did the working out 3 times before i finally cracked what to do!

Onwards and upwards to M2 on the 22nd i say!

8. I did so many past papers: ocr, edexcel as well as a few solomon papers, I thought I had it all covered, but I still found it difficult.
9. ther was a string question on the specimen paper! i really liked it. once you understood it it wasnt too bad! plus on the string question you had to proove the answer so you could know if you were right or not

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