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    did y'all get a number or a value in terms of tan for that douvle collision question. and qs 5 screwed me over

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    (Original post by ChuckNorriss)
    did y'all get a number or a value in terms of tan for that douvle collision question. and qs 5 screwed me over

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    If it's k, I got 1.

    If it's tan(alpha), I got 1/sqrt5.
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    I got k= tan^2(alpha) ...
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    My answers (prob got the shortest distance wrong cos I took the wrong angle

    1) tan a = root 5/5
    2) k=1
    3) not sure. I recalculated it and its around 50m?
    4) d = 12/e, x = 6m
    5) Distance traveled = 1.5 + u(pi/6)
    6) Stable equilibrium

    Any thoughts guys about grade boundaries and full UMS and A*?
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    3.a 5sqrt(17), bearing of 256 b.46.8m

    I think lol
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    (Original post by david0906)
    I got k= tan^2(alpha) ...
    me too

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    (Original post by david0906)
    3.a 5sqrt(17), bearing of 256 b.46.8m

    I think lol
    Dammit ! Got it right after I recalculated it when I walked out from the exam hall :/
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    (Original post by Linkason)
    My answers (prob got the shortest distance wrong cos I took the wrong angle

    1) tan a = root 5/5
    2) k=1
    3) not sure. I recalculated it and its around 50m?
    4) d = 12/6, x = 6m
    5) Distance traveled = 1.5 + u(pi/6)
    6) Stable equilibrium

    Any thoughts guys about grade boundaries and full UMS and A*?
    4) 12/e right?

    How sure are you on 5c) I got the same but not confident

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    1. 1/sqrt5
    2. k=1
    3. 5sqrt17, 256.0, 48.5
    4. d=12/e, x=6
    5. u, 3+u(pi)/6 (??????????????)
    6. Stable
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    Hc is +3 not +1.5.


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    (Original post by angrybirdzzz)
    1. 1/sqrt5
    2. k=1
    3. 5sqrt17, 256.0, 48.5
    4. d=12/e, x=6
    5. u, 3+u(pi)/6 (??????????????)
    6. Stable
    looks good but I got 1.5+u (pi)/6 on 5c)

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    (Original post by Linkason)
    Dammit ! Got it right after I recalculated it when I walked out from the exam hall :/
    i got 48.5

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    (Original post by Linkason)
    My answers (prob got the shortest distance wrong cos I took the wrong angle

    1) tan a = root 5/5
    2) k=1
    3) not sure. I recalculated it and its around 50m?
    4) d = 12/e, x = 6m
    5) Distance traveled = 1.5 + u(pi/6)
    6) Stable equilibrium

    Any thoughts guys about grade boundaries and full UMS and A*?
    I think it was 12/e? - I see you've changed it now, apologies lol

    Not sure, seemed more difficult than last year's but nowhere near 2012
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    (Original post by Euclidean)
    4) 12/e right?

    How sure are you on 5c) I got the same but not confident

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    Thanks! edited it already. Im not sure tho about 5c.
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    (Original post by Euclidean)
    looks good but I got 1.5+u (pi)/6 on 5c)

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    I got his answer since th particle moves at speed 2u it takes 1.5/U to get to B so distance the particle travels is 3 and relative distance is 1.5. And before that it travlled piu/6 hence piu/6+3


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    Can anyone remember the amount of marks it was for each question?
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    Pretty easy I thought probably high boundaries


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    I think it's +3 because after the car covers y and the string length, B is still moving and it comes to 1.5. But I don't know...
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    (Original post by physicsmaths)
    I got his answer since th particle moves at speed 2u it takes 1.5/U to get to B so distance the particle travels is 3 and relative distance is 1.5. And before that it travlled piu/6 hence piu/6+3


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    Why does it move at speed 2U?

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    (Original post by physicsmaths)
    Pretty easy I thought probably high boundaries


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    Yeah thinking about it after the fact, it wasn't that hard. Only that one 5d really messed with me, as well as k=1, but otherwise not that unreasonable as I felt during the paper
 
 
 
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