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    hi,
    i am doing the edexcel m3 paper from January 2009 but i cant do question 5 i think the mark scheme might be wrong because even when i work it out from the last line in the mark scheme it still comes out wrong for me

    thanks

    https://googledrive.com/host/0B1ZiqB...%20Edexcel.pdf

    https://8a40d6c38bafca75cc407741c0f3...%20Edexcel.pdf
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    Looks fine to me. Which line you talking about?
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    i can get to the last line i just get 12 instead of 24 in the final answer
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    Could you post a pic of your working please? Cause I get 24
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    (Original post by mattyd375)
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    cranes neck.

    From the second line moving onto the third line: \displaystyle \frac{amg}{24} - \frac{amg}{48} = \frac{amg}{48} \neq \frac{amg}{24} as you've said.
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    so does that mean im right and the mark scheme is wrong?
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    (Original post by Zacken)
    cranes neck.

    From the second line moving onto the third line: \displaystyle \frac{amg}{24} - \frac{amg}{48} = \frac{amg}{48} \neq \frac{amg}{24} as you've said.
    (Original post by mattyd375)
    so does that mean im right and the mark scheme is wrong?
    Oops! Sorry I kept forgetting to multiply the RHS when I took out the half from 1/2 mv^2
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    But for the alternative methods I get 24?

    I am so confused Zacken
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    Wait nope I just checked again for the first method and got 24
    Spoiler:
    Show
    kill me now pls
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    Okay NOW i just realised Zain was telling you that your working was wrong :rofl: I thought he was telling you it was right...


    So basically your 2nd -> 3rd line = wrong. Check again


    Mark scheme is correct
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    (Original post by mattyd375)
    so does that mean im right and the mark scheme is wrong?
    You're wrong, \displaystyle \frac{1}{24} - \frac{1}{48} = \frac{1}{48}, you seem to think that \displaystyle \frac{1}{24} - \frac{1}{48} = \frac{1}{24}

    You might want to use a calculator next time.
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    Sorry for my running spammy commentary of my perils with this question
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    haha sorry - thanks for the help mental arithmetic isn't always my strong point XD
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    (Original post by mattyd375)
    haha sorry - thanks for the help mental arithmetic isn't always my strong point XD
    No worries it happens to the best of us!

    How're you feeling for M3?
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    (Original post by Student403)
    No worries it happens to the best of us!

    How're you feeling for M3?
    not too bad its the first time i've tried teaching myself module so its taking me a while to get to grips with the exam questions but im getting there
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    (Original post by mattyd375)
    not too bad its the first time i've tried teaching myself module so its taking me a while to get to grips with the exam questions but im getting there
    Hey me too - first proper one I self taught! Well I taught D1 before but that was a joke

    Let me know if you have any questions, yeah? I'll hopefully be doing the same

    Was it just me or are the exam qs a lot easier than the textbook ones?
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    (Original post by Student403)
    Hey me too - first proper one I self taught! Well I taught D1 before but that was a joke

    Let me know if you have any questions, yeah? I'll hopefully be doing the same

    Was it just me or are the exam qs a lot easier than the textbook ones?
    haha will do thanks
    yeah i was really worried when i was doing the example questions from the textbook but now its looking much better
 
 
 
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