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# Edexcel M2 2016 Unofficial Mark scheme watch

1. M2 Unofficial Mark Scheme.
Only questions 1-6 so far, doesn't show the marks.
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2. You're a hero
3. **** got the COM q wrong, i dunno where i went wrong i checked over loads. Anyone remember answers for 7? I got e=1/14 and they will collide again cant remember for the v1 v2 though
4. Thank you very much for these! I got 30/7 for lambda in q6 so that's thrown that one out the window but other than that I'm pleased
5. (Original post by ApieceOFsoap)
**** got the COM q wrong, i dunno where i went wrong i checked over loads. Anyone remember answers for 7? I got e=1/14 and they will collide again cant remember for the v1 v2 though
I also got e=1/14, but that they wouldn't collide as they were both going at a speed of 3u/20 with the direction of motion reversed
6. (Original post by GeneralCarnage)
I also got e=1/14, but that they wouldn't collide as they were both going at a speed of 3u/20 with the direction of motion reversed
That's what I got too. Took me a while to figure out that the impulse was in the negative direction though, I kept getting e > 1 at first
7. Wasn't question 4 0.83m?

Fairly sure all of the measurements were in metres
8. (Original post by Mathlete2198)
M2 Unofficial Mark Scheme.
Only questions 1-6 so far, doesn't show the marks.
I got literally what you got exactly, so that looks good
9. (Original post by Mathlete2198)
M2 Unofficial Mark Scheme.
Only questions 1-6 so far, doesn't show the marks.
Thanks but where's question 1?
10. what was question 7
11. Question 7 was collisions between particles.

For a) I believe particle A had a speed of 0.05U, and particle B had a speed of 2.1U.
b) I think it was 1/14 = e,
and for c), there was no further collision, as both A and B had the same speed (of 0.05U), in the same direction.

I'm not 100% sure on these, however.
12. (Original post by Nick-Gregory)
Question 7 was collisions between particles.

For a) I believe particle A had a speed of 0.05U, and particle B had a speed of 2.1U.
b) I think it was 1/14 = e,
and for c), there was no further collision, as both A and B had the same speed (of 0.05U), in the same direction.

I'm not 100% sure on these, however.
wasn't it -3/20 for the same velocity???
13. (Original post by rogerwww)
wasn't it -3/20 for the same velocity???
Yeah I got 3/20 aswell
14. (Original post by rogerwww)
wasn't it -3/20 for the same velocity???
As I said, not 100%, if you 2 got that you're probably right.
15. i mean the question itself with the speeds value of u masses and impulse...since i cant remember fully my answers i want to try do it to confirm
16. Here are my model answers, with actual questions. Let me know if you spot any mistakes. I disagree with Mathlete2189 on the projectile motion question. If the position is -j, the angle should be negative.
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17. M2_June_2016_MA.pdf (491.1 KB, 629 views)
18. (Original post by Mathlete2198)
M2 Unofficial Mark Scheme.
Only questions 1-6 so far, doesn't show the marks.
For 1(b), I didn't put the limits 2 and 3 cos I wasn't sure. I just did a general integration with a constant c at the end. How many marks do you think I'll lose?? Also in 7, I didn't read the question again and found the angle as below the horizontal (like when the particle is travelling towards the ground) but the method was correct. Not sure about the numbers tho. How many marks do u think I'll lose?? Thanks!
19. The answer 30/7 wouldn't gain you the accuracy mark since an approximation of g needs to be to 2 or 3 SF. Well done on the solutions, though - long due
20. June M2 2016 IAL anyone? Model answers

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