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# Edexcel AS/A2 Mathematics M2 - 17th June 2016 - Official Thread watch

1. (Original post by 1asdfghjkl1)
I did the same, how many marks do u think we would lose out of 5? I reckon we could be given at least 2 - for integrating currently and finding the value at t=3?
Didnt it say "in the third second" hence implying the integral had limits 4,3
2. (Original post by linaxq)
1. Can someone explain how youll lose marks for sig figs

for example for lambda and c i did the fractions but wrote next to them the decimal to one decimal place and the degrees of the projectile below the hotizontal to eith 73.6 or 73.63
You lose 1 accuracy mark for rounding to the wrong degree of accuracy. When you use g, you should give values to 2sf or 3sf. If they ask for it rounded to a certain degree otherwise they'll ask, otherwise I used two.

For g questions they only penalise this once per question.
3. (Original post by smartalan73)
what numbers did you use to get that angle? 0.83 and ?
You have to look at the shape of the object to work out 66.4 its 45 +arctan 0.83: the opposite or adjecent side of the triangle. Since the triangle is isoceles with 45 degrees angle.
4. (Original post by linaxq)
1. Can someone explain how youll lose marks for sig figs

for example for lambda and c i did the fractions but wrote next to them the decimal to one decimal place and the degrees of the projectile below the hotizontal to eith 73.6 or 73.63
COM didnt want any decimals. Anything where you used 9.8 should be to 2 S.Fs but they allow 3 S.Fs. any more than that means no marks.
5. (Original post by Rgrewall)
Didnt it say "in the third second" hence implying the integral had limits 4,3
1st second: 0-1
2nd second: 1-2
3rd second: 2-3
6. (Original post by Squishy•)
You would need 70
70 marks for C3 and C4? If you can, please explain.
Thanks
7. (Original post by Rgrewall)
Didnt it say "in the third second" hence implying the integral had limits 4,3
3 rd second is 2-3, since 0-1 , 1-2 is 2 seconds
8. Poll for the UK paper: http://www.thestudentroom.co.uk/show....php?t=4171568
9. Do errors get carried forward? Like I used 0.x instead of X for a calculation and it changed all my answers up
10. (Original post by cjlh)
1st second: 0-1
2nd second: 1-2
3rd second: 2-3
Oops
11. how many marks do you think i'll lose for b and c if i got lambda wrong in 6a but then did the right method onwards?
12. (Original post by ChilliLemon)
100% in the bag my friend!!!
Yeah man 100% but i failed so hard in fp2 -15 marks. So i have to do well in fp3, what about you? Any more exam?
13. (Original post by NinjaOtter)
COM didnt want any decimals. Anything where you used 9.8 should be to 2 S.Fs but they allow 3 S.Fs. any more than that means no marks.
so 73.3 and 10.44 no marks?
14. (Original post by kingaaran)
Yeah I got this too - you're right
I'm pretty sure this is wrong.

0-1 is the 1st second.
1-2 is the 2nd second.
2-3 is the 3rd second.

So if you integrate between 2 and 3 you get 11/3m.
15. (Original post by cjlh)
You lose 1 accuracy mark for rounding to the wrong degree of accuracy. When you use g, you should give values to 2sf or 3sf. If they ask for it rounded to a certain degree otherwise they'll ask, otherwise I used two.

For g questions they only penalise this once per question.
so 73.3 and 10.44 no marks?
16. (Original post by cjlh)
1st second: 0-1
2nd second: 1-2
3rd second: 2-3
what annoys me is that I did that first then crossed it out
17. Did anyone else get 1.22 as their distance for the centre of mass?
18. (Original post by linaxq)
so 73.3 and 10.44 no marks?
73.3 is right but 10.44 is wrong
19. (Original post by cjlh)
You lose 1 accuracy mark for rounding to the wrong degree of accuracy. When you use g, you should give values to 2sf or 3sf. If they ask for it rounded to a certain degree otherwise they'll ask, otherwise I used two.

For g questions they only penalise this once per question.
For Q4a) I got the 0.8299 but managed to round it to 0.823 so will I just lose the 1 accuracy mark or will they see the 0.8299 and not look past it as it's the correct answer
20. (Original post by NinjaOtter)
what annoys me is that I did that first then crossed it out
So did I! I almost wish i didn't check my paper now

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