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

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    *** OFFICIAL AQA MECHANICS 2 MM2B JUNE 2015 EXAM DISCUSSION THREAD ***
    UNOFFICIAL MARK SCHEME
    1.
    a) \mathbf{F} = (-32 \sin 2t) \mathbf{i} + (12 \cos t) \mathbf{j} [3 marks]
    b) When t = \pi, F = 12.0 \text{N} [2 marks]
    c) \mathbf{r} = (2 + 2 \sin 2t) \mathbf{i} - (11 + 3 \cos t) \mathbf{j} [5 marks]

    2.
    AC = 5.50 \text{m} [4 marks]

    3.
    a) ii) KE = 627 \text{J} [3 marks]
    ii) v = 6.26 ms^{-1} [2 marks]
    b) \mu = 0.400 [3 marks]

    4.
    a) T_{AP} = 52.1 \text{N} [3 marks]
    b) T_{BP} = \frac{25}{3} v^2 - 5g \tan 20^{o} [4 marks]
    c) v = 2.90 ms^{-1} [3 marks]

    5.
    R_{min} =  2120 \text{N} [6 marks]
    R_{max} = 2140 \text{N}

    6.
    \theta = 1.15^{o} [9 marks]

    7.
    a) Show that \dfrac{-3}{10}\ \dfrac{dv}{dt} = v - 2.94 [2 marks]
    b) v = 27.06 e^{\frac{-10}{3} t} + 2.94 [5 marks]
    c) v versus t graph decaying exponentially - intercept at (0,30) approaching asymptote when v=2.94 [2 marks]

    8.
    a) Show that 5v^2 = 306x - 4x^2 - 2704 [4 marks]
    b) Cord is stretched when x is greater than 26 \text{metres} [1 mark]
    c) Maximum value of x = 66.3 \text{m} [2 marks]
    d) i) Value of x when v is at a maximum: x = 38.3m [2 marks]
    ii) Maximum speed: V = 25.1 ms^{-1} [2 marks]

    9.
    \mu = 0.268 [8 marks]

    Date: 22nd June 2015
    Time: 09:00am
    Duration: 1h 30m
    ______________________________

    CORE 3 EXAM DISCUSSION THREAD:
    http://www.thestudentroom.co.uk/showthread.php?t=3041463

    CORE 4 EXAM DISCUSSION THREAD:
    http://www.thestudentroom.co.uk/showthread.php?t=3041479

    ______________________________

    RESOURCES:
    Attached Files
  1. File Type: ppt M2.1 Moments.ppt (2.60 MB, 1654 views)
  2. File Type: ppt M2.2 Centres of Mass.ppt (1.58 MB, 865 views)
  3. File Type: ppt M2.3 Kinematics.ppt (1.71 MB, 883 views)
  4. File Type: ppt M2.4 Newton_s Laws of Motion.ppt (1.21 MB, 436 views)
  5. File Type: ppt M2.5 Differential Equations.ppt (837.0 KB, 414 views)
  6. File Type: ppt M2.6 Uniform Circular Motion.ppt (2.26 MB, 1115 views)
  7. File Type: ppt M2.7 Work and Energy.ppt (1.56 MB, 945 views)
  8. File Type: ppt M2.8 Vertical Circular Motion.ppt (1.29 MB, 1139 views)
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    How is everyone preparing? Does anyone have access to papers before 2005?

    I've also updated links to the Core 3 and Core 4 exam threads in the original post.


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    hey we've just started this unit in further maths AS, as we can't do D1. Wandering how everyone finds it?
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    (Original post by bitofageek)
    hey we've just started this unit in further maths AS, as we can't do D1. Wandering how everyone finds it?
    Hey, I've actually started this too not long ago too aha. Are you doing M1 as well then in pure maths I take it?

    I've found it okay so far. Physics AS helps a lot, and I'm hoping physics A2 also helps with angular velocities, circular motion etc.

    What topics have you done so far?


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    (Original post by CD223)
    Hey, I've actually started this too not long ago too aha. Are you doing M1 as well then in pure maths I take it?

    I've found it okay so far. Physics AS helps a lot, and I'm hoping physics A2 also helps with angular velocities, circular motion etc.

    What topics have you done so far?


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    Yeah we're doing M1 in Normal Maths, we've just done moments and centres of mass.
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    (Original post by bitofageek)
    Yeah we're doing M1 in Normal Maths, we've just done moments and centres of mass.
    Oh right! I did M1 last year as I'm in second year, but I only do normal maths A2 aha. Oh fair enough! Manageable?


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    How far is everyone in M2?
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    should't this thread move to maths exams?

    and if anybody does so could you please also move mine

    http://www.thestudentroom.co.uk/show....php?t=3043497

    (I have asked before)
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    (Original post by TeeEm)
    should't this thread move to maths exams?

    and if anybody does so could you please also move mine

    http://www.thestudentroom.co.uk/show....php?t=3043497

    (I have asked before)
    I was hoping it should...


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    (Original post by Tiwa)
    How far is everyone in M2?
    I've done moments and centre of mass so far. So not far 😂


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    (Original post by CD223)
    I've done moments and centre of mass so far. So not far ������


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    Ah, alright.
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    (Original post by Tiwa)
    Ah, alright.
    How about you?


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    (Original post by CD223)
    How about you?


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    We've basically almost finished. We're on circular motion. Just about 3/4 more lessons and we would have finished the course.
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    (Original post by Tiwa)
    We've basically almost finished. We're on circular motion. Just about 3/4 more lessons and we would have finished the course.
    Ah nice. Do you do Physics?


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    (Original post by CD223)
    Ah nice. Do you do Physics?


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    Yep! I do OCR A Physics.
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    (Original post by Tiwa)
    Yep! I do OCR A Physics.
    Would you say that the content overlapping has helped you with M2?


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    (Original post by CD223)
    How is everyone preparing? Does anyone have access to papers before 2005?

    I've also updated links to the Core 3 and Core 4 exam threads in the original post.


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    I'm taking this exam. I'm also self studying M3. I don't think M2 will be very difficult as it seems a combination of common sense, differential equations and calculus and knowledge which I already have from physics (OCR A).

    freeexampapers.com goes back to 2004, but I don't have access to any before that.
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    (Original post by morgan8002)
    I'm taking this exam. I'm also self studying M3. I don't think M2 will be very difficult as it seems a combination of common sense, differential equations and calculus and knowledge which I already have from physics (OCR A).

    freeexampapers.com goes back to 2004, but I don't have access to any before that.
    Oh nice! Not too sure whether an M3 thread exists yet. I hope it goes okay. I just want 90% in C3 and C4. If that happens than I can feel a lot better over it! Yeah it's good that physics overlaps and some content is similar to that already studied. What is M3 like? Aha.


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    (Original post by CD223)
    Oh nice! Not too sure whether an M3 thread exists yet. I hope it goes okay. I just want 90% in C3 and C4. If that happens than I can feel a lot better over it! Yeah it's good that physics overlaps and some content is similar to that already studied. What is M3 like? Aha.


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    I'm not taking the M3 exam, I'm just studying M3 for STEP. I already have loads of exams early to mid June, so M3 as well would be too much.

    I've only been doing M3 for a week, but so far it's good. I've done relative motion and dimensional analysis so far. The collision chapters are the stuff I really need to know, but I thought I may as well do the whole module because more mechanics knowledge will always help.
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    (Original post by morgan8002)
    I'm not taking the M3 exam, I'm just studying M3 for STEP. I already have loads of exams early to mid June, so M3 as well would be too much.

    I've only been doing M3 for a week, but so far it's good. I've done relative motion and dimensional analysis so far. The collision chapters are the stuff I really need to know, but I thought I may as well do the whole module because more mechanics knowledge will always help.
    Oh right. Sounds like you've got a large workload! What do you want to do at uni and where?


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