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# AQA A2 Mathematics MM2B Mechanics 2 - Monday 22nd June 2015 [Exam Discussion Thread] watch

1. (Original post by Red Fox)
I thought find theta was way too short for 9 marks so got a bit worried.

I got 2120 and 2140 to 3sf but no idea if it's right.
Well I got the exact same!!
2. (Original post by bw_wwfc)
that will get you 0 ums overall
What do you mean by 0 ums do you mean no marks?
3. (Original post by Red Fox)
Answers are only to 3sf when you have to use a calculator, you didn't need to use one to get 27.06
will i lose a mark, i wrote what you wrote on the previous line
4. This was so hard man.
5. (Original post by olatee)
What do you mean by 0 us do you mean no marks?
its a joke mate
6. (Original post by bw_wwfc)
will i lose a mark, i wrote what you wrote on the previous line
I think you'll be fine.
7. That was the hardest paper I've seen. hopefully my C3 and C4 will compensate
8. Not sure what question order but heres some of my answers:
4.85m
627.2 J
V=6.26
0.4=u
v=2.90
min= 2140
max=2120
1.15 degrees
v=2.94+27.06e^((-10/3)*t)
66.3
and got root 3a but i could not do the rest lulz
9. (Original post by KP7991)
What did people get for the minimum and maximum resultant forces?
2120 and 2140
10. Did anyone get 0.342 for the last questions? I ended up with a quadratic equation in mu :/
11. I got like And I just fully guessed that answer...
12. I got something similar but e^(10/3)t + 30 can't remember the coefficient before the e though

(Original post by sum1random)
did any1 get 27.06e^[-10/3t] + 2.94 for velocity for jumper?
Not sure what question order but heres some of my answers:
4.85m
627.2 J
V=6.26
0.4=u
v=2.90
min= 2140
max=2120
1.15 degrees
v=2.94+27.06e^((-10/3)*t)
66.3
and got root 3a but i could not do the rest lulz
It all looks right to me (except for the last question where I have no idea) but what was 4.85m for?
14. Can anyone show a worked solution for the Power question ? Cannot for the life of me get theta to be 1.15

Resistive force was 4000N
Mass 1400kg
Velocity 20m/s
Power 91.1 Kw
Acceleration 0.2
15. (Original post by kateedge100)
Did anyone get 0.342 for the last questions? I ended up with a quadratic equation in mu :/
I got this value.. Not even sure how..
16. (Original post by Red Fox)
It all looks right to me (except for the last question where I have no idea) but what was 4.85m for?
distance AC
17. Boundary predictions?
distance AC
Ahhh I got 5.5m, not sure if it's correct though.
19. did anyone get 5.5m for the distance AC on q2?
20. (Original post by Hexaneandheels)
I got something similar but e^(10/3)t + 30 can't remember the coefficient before the e though
Thats what i got as well.

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