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

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    (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!!
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    (Original post by bw_wwfc)
    that will get you 0 ums overall
    What do you mean by 0 ums do you mean no marks?
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    (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
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    This was so hard man.
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    (Original post by olatee)
    What do you mean by 0 us do you mean no marks?
    its a joke mate
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    (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.
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    That was the hardest paper I've seen. hopefully my C3 and C4 will compensate
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    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
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    (Original post by KP7991)
    What did people get for the minimum and maximum resultant forces?
    2120 and 2140
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    Did anyone get 0.342 for the last questions? I ended up with a quadratic equation in mu :/
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    I got like  \mu = 0.366 And I just fully guessed that answer...
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    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?
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    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
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    (Original post by Shadez)
    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?
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    (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..
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    (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
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    Boundary predictions?
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    (Original post by Shadez)
    distance AC
    Ahhh I got 5.5m, not sure if it's correct though.
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    did anyone get 5.5m for the distance AC on q2?
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    (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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