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M1 24/05/12

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    (Original post by cazman34)
    How about the acceleration of the particle moving down the slope? Tell me you got 1.06ms^-2 as well haha
    1.05 m/s^2 so yeah, close enough

    Edit: I rounded alpha here
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    For that last question were we ment to split the shapes into two or three? Bc I split it into 3. And has anyone got the paper??
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    What did everyone get as alpha?
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    I found the test today really quite nice, in comparison to all the other papers.

    I got stuck on finding the tension AP (question 6) because I managed to skip over the part which said P had a weight, so ended up with the tension equal to 0. Realised my mistake in the end.

    Other question I probably lost a mark on is the height the sky diver fell. I rushed it and got height is aprox. 817.3m or something similar to that. Anyone else get that?
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    (Original post by cazman34)
    How about the acceleration of the particle moving down the slope? Tell me you got 1.06ms^-2 as well haha
    I got that
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    (Original post by Astonix)
    I found the test today really quite nice, in comparison to all the other papers.

    I got stuck on finding the tension AP (question 6) because I managed to skip over the part which said P had a weight, so ended up with the tension equal to 0. Realised my mistake in the end.

    Other question I probably lost a mark on is the height the sky diver fell. I rushed it and got height is aprox. 817.3m or something similar to that. Anyone else get that?
    I got something around 817.3 too, probably exactly that :P
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    (Original post by priteshp)
    For that last question were we ment to split the shapes into two or three? Bc I split it into 3. And has anyone got the paper??
    I split it into 3. You were meant to I think. They drew dotted lines splitting it up into three, and I don't know a simple way of finding the area and CoM of an L-shape without splitting it into 2.
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    (Original post by cazman34)
    What did everyone get as alpha?
    If you're on about question 6, I got alpha as about 54 I think.
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    (Original post by cazman34)
    I got something around 817.3 too, probably exactly that :P
    807.5m if I remember rightly
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    (Original post by cazman34)
    What did everyone get as alpha?
    Which one? I remember alpha being 52.57 or something..

    I thought the exam went really well
    I'm glad that no trick questions were thrown out there; I was panicking like mad prior to the exam.

    Does anyone remember what they got for v on question 7 - the hot air balloon question? I got 49, which for some reason doesn't seem right.
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    (Original post by Astonix)
    I split it into 3. You were meant to I think. They drew dotted lines splitting it up into three, and I don't know a simple way of finding the area and CoM of an L-shape without splitting it into 2.
    Pheww I can't remember my answer most probs got most of marks for that anyways.

    Any grade boundaries prediction?????
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    (Original post by Perpetuallity)
    807.5m if I remember rightly
    Ah yes, I got that Really happy now!
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    (Original post by ConstantlyStressed)
    Which one? I remember alpha being 52.57 or something..

    I thought the exam went really well
    I'm glad that no trick questions were thrown out there; I was panicking like mad prior to the exam.

    Does anyone remember what they got for v on question 7 - the hot air balloon question? I got 49, which for some reason doesn't seem right.
    Yep, that's what I got

    v=u + at = 0 + 5(9.8) = 49m/s
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    (Original post by ConstantlyStressed)
    Which one? I remember alpha being 52.57 or something..

    I thought the exam went really well
    I'm glad that no trick questions were thrown out there; I was panicking like mad prior to the exam.

    Does anyone remember what they got for v on question 7 - the hot air balloon question? I got 49, which for some reason doesn't seem right.
    That is right what's what I got
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    (Original post by Perpetuallity)
    Yep, that's what I got

    v=u + at = 0 + 5(9.8) = 49m/s
    Yes...I feel so relieved...

    Now I've got C4 to study for..blegh:mad:
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    Yeah, I seem to be getting what others are getting. Some numbers I remember: 807.m for the SUVATs question, 29000N and 60kg for 1. a and b respectively. 0.4m for the equilibrium question. Coefficient of Restitution = 0.36. I remember a 41.2N, and alpha equaling 57.? somewhere.

    A nice paper overall, I think I've lost some marks at the end of Question 3 and 9, but I got the main marks anyway. Hopefully the A grade boundary is around 58~
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    So for that alpha question did ppl do tan-1 the number they gave for the angle???
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    (Original post by priteshp)
    So for that alpha question did ppl do tan-1 the number they gave for the angle???
    I used,

    (Rcos(\theta))^2 + (Rsin(\theta))^2 = 30^2 + 4g^2

    and as you (should) know, the cos^2 and sin^2 cancel to 1, so left with R, which I then plugged back in to previous equations to get alpha.

    I checked it with the tan method in the exam too and came out with the same answer.
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    Anyone have an unofficial mark scheme?

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Updated: May 24, 2012
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