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Anyone do Mechanics 3 (MEI OCR) today? watch

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    I don't think many on this board do MEI, but I'll try anyway.

    How did you find it? Personally, I thought it was much harder than the past papers. I was a bit of a mess but hope it went OK.

    1) Rubber band question. (All algebra, and not even a "show that" question.. Annoying.)
    2) Fishing float SHM. (OK, I think.)
    3) Ball inside a rotating wheel. (Ugh. So many simple mistakes - but hopefully I got there in the end.)
    4) Centre of mass of a rotated circle segment. (Tricky, but pretty much all "show that" questions, which was nice.)

    Ben
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    oh, I just made a topic on this, doh!

    For the very first part of question one, did you have to divide the tension by 4, as it was stretched round 4 pegs? I hope not.
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    me too!!! its was freaking difficult.

    i could not do half of q2 at all.
    q3- on teh ship rod thingy was ok. except how to prove taht y=1.5 g!!!
    q1- ok got a large algebra term at the end for V
    24- not too bad. i did not undersatnd what the large plane thingy was. just applied teh formula and it worked strangely.
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    I thought it was quite a bit harder than the past papers and short on time aswell

    M4 went better tho
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    [QUOTE=sonja]I thought it was quite a bit harder than the past papers and short on time aswell

    TELL ME ABOUT IT!!! i had teh same experience. Jan 2005 was easy!!!! and so was teh previous papers!!!
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    [QUOTE=chubby]
    (Original post by sonja)
    I thought it was quite a bit harder than the past papers and short on time aswell

    TELL ME ABOUT IT!!! i had teh same experience. Jan 2005 was easy!!!! and so was teh previous papers!!!
    Nearly everyone at school found it bad too, so I'm thinking (hoping) the grade boundaries will be really low.
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    Ah ok, now I know there's someone to actually read what I write, I might write a bit more.

    Personally I would rate it harder (or at least less straightforward) than P6.

    1) I think I got vaguely like v = SQRT(12gh^2/a - 6gh). For the first part, no, I think tension is tension is tension.
    2) I got v = 0.173, t = 4/30 pi = 0.419.
    3) Can't remember what the final part was about...
    4) I got 7/40r (first I got 27/40r but then realised I had to take 1/2r from it).
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    i really do hope that the the grade boundaries are like 6marks and above u get an A lol
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    in my centre everone found it hard too
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    phew. feel a bit better about it now....theres not usually parts i dont know how to attempt and im usually fine on time but that exam was mean!!
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    (Original post by -joanne-)
    phew. feel a bit better about it now....theres not usually parts i dont know how to attempt and im usually fine on time but that exam was mean!!
    You're in good company. :p:

    Out of interest, did anyone here do P6?
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    (Original post by Ben C)
    You're in good company. :p:

    Out of interest, did anyone here do P6?
    Yes pure 6 was great!, the further math modules are a lot interesting and better then normal math modules :rolleyes:

    But I haven't done a single module of Mechanics, I'll be doing M1 in September
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    I did P6, it went better than I thought it would.
    I'm glad maths does get more interesting the more you learn, P6 is so much more involved than GCSE stuff (as well as being harder, obviously)- it actually makes you THINK, which is good.

    Anyway, I'm glad everyone else seems to think M3 was hard, nice to know it wasn't just me!
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    And also the fact a car alarm was going off for at least an hour of the exam and some grrrr-ing boyracers came up the highstreet playing their 'music' really loud, very offputting in an already stressful situation

    I just couldnt get the patience with all that going on to finish all of my answers, so i've got liek the first parts right and hten not been able to finish he last half of the big questions
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    That was really hard. A lot harder than past papers. For the second part of question 1, I take it you aren't supposed to use actual values?

    I got the answer to be something like (sqrt)a^3/3 - a

    That was a part of my final answer anyway.. I have a hazy memory. Messed up with the velocity question, what equation were you supposed to use?

    I just hope the grade boudaries will be lowered enough (my teacher told me today they're *very* low compared with other modules) for me to scrape a pass... :/ fortunately I only need Es in these modules to get into uni.
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    Was it me though or were the questions absolutely nothing like the other questions which have come up in the past?? i mean a float? a rubber band round pegs??
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    Yeah it was peculiar. There is a rubber-band-around-pegs question in the textbook (catapult) though I've never seen an entirely algebraic question in a past paper.
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    (Original post by Dav)
    Messed up with the velocity question, what equation were you supposed to use?
    For that one I used energy - GPE, KE and elastic, and equated before and after. My answer, or at least something near it, is above.
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    (Original post by Ben C)
    For that one I used energy - GPE, KE and elastic, and equated before and after. My answer, or at least something near it, is above.
    Well, in that case I should hopefully get a method mark. What was your answer for the extension?
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    Well, that was evil. Really the m3 and m4 were the worst ones ive done ever i think. so many gaps *shakes head* i didn't do any of 3 on m3, it compleatly threw me. Im thinknig about 10% each paper. But ooh well, hopefully the boundaries will be very low.
 
 
 
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