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Wjec m2 2014

Since there's no thread for WJEC M2 today, shows how unpopular our exam board is. The exam was alright, apart from the weird vector question.

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it was alright apart from the last 3 question

the AB^2 one, i had x as -44, everyone else got 45 so idk
part c on 6 i missed (crosses y axis) but as soon as i left i realised how it was done :/
and the last question i got my angle as 70degrees?

if i got say half marks on those 3 im still on an A so i think it should be alright?
how many questions/what questions were there? i'm convinced i've forgotten one... whether i missed it out or not i don't know xD
Reply 3
I also got 45 for x but was confused when you had to differentiate it with respect to t, but there were x's there and I was gonna use implicit differentiation but thought mehh and for 6 (c) you had to put the i bit to 0 eg -2cos(2t) = 0 so t= pi/4 and sub it into the position vector
i got 33.33 degrees...
Reply 4
Original post by imapedo
I also got 45 for x but was confused when you had to differentiate it with respect to t, but there were x's there and I was gonna use implicit differentiation but thought mehh and for 6 (c) you had to put the i bit to 0 eg -2cos(2t) = 0 so t= pi/4 and sub it into the position vector
i got 33.33 degrees...


I got the same for 6 (c)
Reply 5
Original post by Boblobster
how many questions/what questions were there? i'm convinced i've forgotten one... whether i missed it out or not i don't know xD


There were 7 questions, don't worry :smile: It was kind of strange because there weren't diagrams for the circular motion questions so it felt like there was supposed to be more.
that's alright then, panic over!
yeah i found it alright aye, the last question though took me for six a bit though because i thought i had u, not u^2 from before. ended up with all sorts of fun stuff the first time around! did spot it eventually though, but as a result i couldnt check for very long...
Reply 7
Can anyone remember their answer for the magnitude of force on 6a?
I know I screwed it up big time, especially the last question where I used u^2 as v^2 instead of using conservation of energy to find v^2. I wanna bang my head against a wall every time I think about it. That's 9 marks down the drain yay.

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Reply 9
Original post by Jonj1
Can anyone remember their answer for the magnitude of force on 6a?


201 N
Original post by imapedo
201 N


226
At first I had 201 also, but then I thought I should use the magnitude rule root (a^2 + b^2) so changed my answer. Because with 201 you didnt take into account that I and J are seperate .... not sure if im right
Reply 11
I entirely messed this up. I know I got the projectiles and the last question wrong, I had x=35 not 45 and when you put that back into the original equation the distance between the two vectors only had an i component so I think it might have been 35. I was hoping that this would be one of my A* modules but I'd be lucky with a low A, 100 UMS in FP1 in January may have saved my a*se
Anyone else get 70degrees ish for the last question?? Hmmm not sure if ill get an A on this afterall. Hopefully c4 is better
Can anyone remember how many marks part b) of the last question was worth? I think I did okay on the rest of the paper, but I know I got that part completely wrong - I'd be lucky to get more than 2 marks from it :frown:

Original post by imapedo
I also got 45 for x but was confused when you had to differentiate it with respect to t, but there were x's there and I was gonna use implicit differentiation but thought mehh and for 6 (c) you had to put the i bit to 0 eg -2cos(2t) = 0 so t= pi/4 and sub it into the position vector
i got 33.33 degrees...

Rather confusingly, x was actually a constant in this question, so it was just with respect to t
(edited 9 years ago)
Original post by MasonC14
I entirely messed this up. I know I got the projectiles and the last question wrong, I had x=35 not 45 and when you put that back into the original equation the distance between the two vectors only had an i component so I think it might have been 35. I was hoping that this would be one of my A* modules but I'd be lucky with a low A, 100 UMS in FP1 in January may have saved my a*se

Sorry if I misunderstood because your last statement was potentially slightly ambiguous, but do you realise that FP1 is not an A* module? You need 90% on average across any three modules out of FP2/3, M2, S2 and M3 or S3 (sorry if you knew this and you just meant FP1 would get you the 'A part' of your A*)
(edited 9 years ago)
Reply 15
Original post by bluebell_flames
Sorry if I misunderstood because your last statement was potentially slightly ambiguous, but do you realise that FP1 is not an A* module? You need 90% on average across any three modules FP2/3, M2, S2 and M3 or S3 (sorry if you knew this and you just meant FP1 would get you the 'A part' of your A*)


Yeah I know :smile: I meant to imply that FP1 would simply make up for my mistakes today and I just need to focus on making the A* boundary in the other modules, I was hoping that this one would be a high 90's but it was a completely different layout and structure to the previous years and I think it threw me a little
Original post by MasonC14
Yeah I know :smile: I meant to imply that FP1 would simply make up for my mistakes today and I just need to focus on making the A* boundary in the other modules, I was hoping that this one would be a high 90's but it was a completely different layout and structure to the previous years and I think it threw me a little

Oh I see - sorry for the misunderstanding... Best of luck with the rest of your modules :smile:
Original post by casparianStrip
I know I screwed it up big time, especially the last question where I used u^2 as v^2 instead of using conservation of energy to find v^2. I wanna bang my head against a wall every time I think about it. That's 9 marks down the drain yay.

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I'm in the exact same boat as you, know how you feel!!! :angry:
Does anyone know their answer for 6c? distance from the origin when the vector passes through the y axis..
Original post by bluebell_flames
Can anyone remember how many marks part b) of the last question was worth? I think I did okay on the rest of the paper, but I know I got that part completely wrong - I'd be lucky to get more than 2 marks from it


Part b was 9 marks for I and II

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