M3 Pre-Exam thread (edexcel)

Scroll to see replies

Missed out 17 marks. So many people missed out 12 marks on the CoM question...it was crazy. But despite that im still really happy at how it went! Grade boundaries should be hell low. What did you guys think? And ha anyone got an unofficial mark scheme for this?

Reply 181

IcedTea&PotNoodle

This exam was a nightmare! Think i got around 15 marks in total. Goodbye Nottingham and probably goodbye university.

Reply 182

Antimony

The second part of the proof question was horrible

Reply 183

I got pooled!!!!

what did people get for k, on the weird cone CofM question?
overall i found it quite hard but think i did alright :s-smilie:

Reply 184

teek

Hardest paper for a good few years, managed to get most of it though I think/hope.

Got all the CoM question, not sure on my value of K, i think it was around 0.25 though, didn't seem right

(edited 11 years ago)

k=5/4 ?

Original post by I got pooled!!!!

what did people get for k, on the weird cone CofM question?
overall i found it quite hard but think i did alright :s-smilie:

I got 5/4 for K

Reply 187

sweetascandy

When will someone post the solutions? We do still have Arseys back, right? :colondollar:

I'm gunna forget my answers by tomorrow morning!

Reply 188

Jellybean732

These are the answers I got (can't remember the questions I'm afraid)
1a. -4e^-2x (this was the acceleration from v = 2e^-x)
1b. x = ln(2t+1)
2a. 1.5
2b. 24
2c. 0.182
3. 223.5N and 76.5N (this was the tension question)
4a. The centre of mass was something like 5/4a? (proof)
4b. k = 5/8 (think this is wrong!) General consensus that this is 5/4 - hopefully some marks before I messed up and divided by 2?
5. Proof?
6. Proof?
7a. 0.9 proof Mainly wrong hereafter I think...
7b. 1.4
7c. proof?
7d. 1.3?

Not sure how accurate any of the answers are - thoughts?

(edited 11 years ago)

Reply 189

username287755

Original post by Arsey

Model solutions

(only have June 11 - done by Gibbo I think)

can you upload the june 2012 paper please?

Reply 190

I got pooled!!!!

should have said, i got 1.25 to 3sf.
personally that was my hardest question inn the paper

Reply 191

I got pooled!!!!

Original post by Jellybean732

These are the answers I got (can't remember the questions I'm afraid)
1a. -4e^-2x (this was the acceleration from v = 2e^-x)
1b. x = ln(2t+1)
2a. 1.5
2b. 24
2c. 0.182
3. 223.5N and 76.5N (this was the tension question)
4a. The centre of mass was something like 5/4a? (proof)
4b. k = 5/8 (think this is wrong!)
5. Proof?
6. Proof?
7a. 0.9 proof
7b. 1.4
7c. proof?
7d. 1.3?

Not sure how accurate any of the answers are - thoughts?

i agree with all but 4b. where i got 5/4 and i think i got a different answer for 7d. but can't remember

Reply 192

sweetascandy

Original post by Jellybean732

These are the answers I got (can't remember the questions I'm afraid)
1a. -4e^-2x (this was the acceleration from v = 2e^-x)
1b. x = ln(2t+1)
2a. 1.5
2b. 24
2c. 0.182
3. 223.5N and 76.5N (this was the tension question)
4a. The centre of mass was something like 5/4a? (proof)
4b. k = 5/8 (think this is wrong!)
5. Proof?
6. Proof?
7a. 0.9 proof
7b. 1.4
7c. proof?
7d. 1.3?

Not sure how accurate any of the answers are - thoughts?

I recognise the first 3 :smile:

can't really remember the rest until I see the questions

Reply 193

Jellybean732

Original post by I got pooled!!!!

i agree with all but 4b. where i got 5/4 and i think i got a different answer for 7d. but can't remember

Yeah fairly sure my answer of 5/8 is wrong :/ and 7d I think I put down two different answers... let's hope one's right!

Reply 194

username548498

Lol in a fit of panic I didnt get 1b in terms of x, but whatever. I was annoyed at the sector-based CoM proof. I was so confused by my wrong answer until I read that the angle is 2alpha 1minute before the end! -.- Dissapointing, but luckily I only need 180 ums from M3, M4 and Fp2 to get my A in FMaths :smile:

Reply 195

I got pooled!!!!

Original post by Jellybean732

Yeah fairly sure my answer of 5/8 is wrong :/ and 7d I think I put down two different answers... let's hope one's right!

well thanks for posting yours, has made me feel more confident than i was before. ima go to bed and look at the mark scheme 2moro.

gd luck

Reply 196

Jellybean732

Original post by I got pooled!!!!

well thanks for posting yours, has made me feel more confident than i was before. ima go to bed and look at the mark scheme 2moro.

gd luck

Good luck to you too - yeah not a bad idea! Hopefully someone will have uploaded a paper/ms tomorrow

Reply 197

rfarhan

Original post by Jellybean732

These are the answers I got (can't remember the questions I'm afraid)
1a. -4e^-2x (this was the acceleration from v = 2e^-x)
1b. x = ln(2t+1)
2a. 1.5
2b. 24
2c. 0.182
3. 223.5N and 76.5N (this was the tension question)
4a. The centre of mass was something like 5/4a? (proof)
4b. k = 5/8 (think this is wrong!) General consensus that this is 5/4 - hopefully some marks before I messed up and divided by 2?
5. Proof?
6. Proof?
7a. 0.9 proof
7b. 1.4
7c. proof?
7d. 1.3?

Not sure how accurate any of the answers are - thoughts?

i got k= 1/2? how exactly were u supposed to work it out? other then that most of these look quite familiar...

Reply 198

Epiphany7

7D was 4.20, and K was 5/4, I think. The proof was horrible.

Reply 199

starkrush

Original post by Jellybean732

These are the answers I got (can't remember the questions I'm afraid)
1a. -4e^-2x (this was the acceleration from v = 2e^-x)
1b. x = ln(2t+1)
2a. 1.5
2b. 24
2c. 0.182
3. 223.5N and 76.5N (this was the tension question)
4a. The centre of mass was something like 5/4a? (proof)
4b. k = 5/8 (think this is wrong!) General consensus that this is 5/4 - hopefully some marks before I messed up and divided by 2?
5. Proof?
6. Proof?
7a. 0.9 proof
7b. 1.4
7c. proof?
7d. 1.3?

Not sure how accurate any of the answers are - thoughts?

I agree with 1-4a. 4b I also got k = 5/8 but apparently it's wrong. 7b and d I got different answers I think (definitely for b) but I'm pretty sure I got it wrong somewhere.