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M3 Pre-Exam thread (edexcel)

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Reply 20

fGDu

Hi I'm self teaching myself this one as an extra module, don't ask why I don't have a sane answer :tongue:

It seems to coming together ok but it has taken a lot more studying than getting taught a module at school.

Reply 21

lumzz

Hi! I'm self teaching this along with FP2 and FP3. It's going great, considering I'm the only one doing the exams in my country :P

Reply 22

TenaciousMonkey

Hi, I have a question about Jan 08...

Question paper: http://www.sci2.co.uk/fmaths/M3/M3%20Past%20Papers/2008%20Jan%20QP.pdf
Mark Scheme: http://www.sci2.co.uk/fmaths/M3/M3%20Past%20Papers/2008%20Jan%20MS.pdf

On question 6d) can someone explain to me what they;ve done? Was really stuck on this - the mark scheme;s not very clear - and it's come up a couple of times in the old papers so it'd be great if I knew how to do it... thanks :smile:

Reply 23

TheJ0ker

Original post by TenaciousMonkey

When the particle is level with O again it has the same speed as it did when it is projected. Then you find the speed at the point C using energy considerations and resolve the forces towards the centre of the new circle.

Reply 24

TenaciousMonkey

Original post by TheJ0ker

Oh, I see! Thanks :smile:

I. Hate. M. 3.

Does anyone have a table with all the grade boundaries over the years for this module?

Reply 27

TheUltimateProof

This module has been quite tasty. I like the dynamics and statics stuff because you build up your own questions and don't have to do it mechanically. Hoping for a nice high 90 to finish off my mechanics adventure but I know it won't be a formality.

Grade boundaries anyone?

Reply 28

Estelle123

Original post by sweetascandy

Does anyone have a table with all the grade boundaries over the years for this module?

http://www.edexcel.com/iwantto/Pages/grade-boundaries.aspx cant seem to find any below 2009 :s-smilie:

Reply 29

sweetascandy

Original post by Estelle123

http://www.edexcel.com/iwantto/Pages/grade-boundaries.aspx cant seem to find any below 2009 :s-smilie:

Oh no, I was thinking of those tables which people put up (like in the fp2/fp3/s2 threads) with just the module and their grade boundaries for a number of years. Not sure if any of what I've wrote makes sense. :s

Reply 30

TheJ0ker

Original post by TheUltimateProof

It has definitely been more interesting than M2, I think the dynamics and kinematics are the best parts. I need like 80 in this or FP2 to get an A* but I would also like to finish of my mechanics adventure with a high 90 :tongue:

Reply 31

james969

With regards to june 2005 mark scheme:

http://www.google.co.uk/url?sa=t&rct...UdxdpIP9uDAGUA

In question 4, if you take the other angle than they did in the triangle, then cos@=0.5

Therefore mgcos@=R should give you the answer but its wrong?

PS i understand how they did it but this is annoying me

Reply 32

kloitrell

Original post by sweetascandy

This is Arsey's spreadsheet of grade boundaries.
http://www.thestudentroom.co.uk/showthread.php?t=1313284

Below are examiners' reports from Jan 2002. Grade boundaries are at the end of each report.
http://www.mediafire.com/?max6ozfwn77sr90

Reply 33

sweetascandy

Original post by kloitrell

Thanks...it's so long though.. I tried to compile a document with just m3 but I didn't get very far (see attachment). Does anyone want to continue? :biggrin:

m3 gb #2.xlsx10.5KB

Reply 34

kloitrell

Original post by sweetascandy

Thanks...it's so long though.. I tried to compile a document with just m3 but I didn't get very far (see attachment). Does anyone want to continue? :biggrin:

Here you are. Jan 2012 also included.

M3 grade boundaries.xlsx10.3KB

Reply 35

sweetascandy

Original post by kloitrell

Here you are. Jan 2012 also included.

I hope you live a long life :love:

Have some rep :redface:

Reply 36

sweetascandy

For string questions (ch2), how do you know when to only use x as the extension or when to add on the e as well?

Reply 37

TheJ0ker

Original post by sweetascandy

For string questions (ch2), how do you know when to only use x as the extension or when to add on the e as well?

I am unsure of what you mean, can you give an example of a question you are struggling with?

Reply 38

dzone25

Original post by sweetascandy

For string questions (ch2), how do you know when to only use x as the extension or when to add on the e as well?

Usually if the model is a particle hanging from somewhere, when it's in equilibrium it has extension "e" and when it's pulled a further distance from the equilibrium it has an extra extension "x"

Reply 39

sweetascandy

Original post by dzone25

Usually if the model is a particle hanging from somewhere, when it's in equilibrium it has extension "e" and when it's pulled a further distance from the equilibrium it has an extra extension "x"

But I thought e was the extra extension. so when in equilibrium, are you saying T=(λe)/l and when its pulled extra distance, T=λ(x+e)/l ?
I agree with the latter but isn't the former usually written as T=λx/l ??