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    Mty mark scheme posted.

    Electronic copies of the paper wont be available for quite some time
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    (Original post by MikeyP96)
    i put it was the same as the component of the weight down the slope/parallel to the slope since the raindrop is stationary
    I put this also, is there an uniffial marks sheme so i can work out what i think i might have gotten?
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    (Original post by cyiarik)
    i remember some answers but not the actual questions they were answering :P , so ill just post random answers i got



    kgm^-2
    giga is 1000 times bigger than mega
    density = 1.6x10^-? kgm-3 [forgot what it was to the power of]
    force constant is the force per unit extension
    R=1.4x10^-5 and F=6.3x10^-5 (something close to the) the F is the same because the raindrop is stationary/in equilibrium

    3.5ms^-2 for instantaneous acceleration of a trolley i think
    I got ratio of B/A as 2.8N
    the moments question i got x(50-x)=12x and i think the answer was 0.37m

    the question about power:
    -power is rate at which work is done
    -work done = 5.4x10^?
    -output was 390 Watts
    -Input was 1228 Watts / 1.3x10^3 Watts

    i wrote for one question something about weight being smaller than drag at t=0.05 because the ball was decelerating and then at t=0.25 they were equal/there was zero acceleration

    for the Youngs modulus question i got 1.9x10^9 Pa
    Apparently the graph of stress/strain would remain the same :L

    For the last question i wrote that it was polymeric but forgot to finish my explanation of why it was good for aeroplane tyres (doh!) :L

    i basically fluffed my way through the explanations; dont think i did that well tbh :L did anyone get similar answers to me?


    I got alot of the same answers as you but a few differences here and there
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    (Original post by yodawg321)
    What did people say about the forces of graph.

    For the first point I said about the drag force being greater than the weight force which means it deaccelerates.

    And for the second point I put about the weight and drag forces being equal which makes constant velocity.

    anyone say anything like this?
    Yeah that was right i think, what did you pur for the ball accelerating with springs b and a ??
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    (Original post by teachercol)
    Mty mark scheme posted.

    Electronic copies of the paper wont be available for quite some time
    did you say the mark scheme has been posted ?
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    (Original post by harrydry)
    did you say the mark scheme has been posted ?
    were lol
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    (Original post by sohailkm96)
    For the perpendicular component you need to use the cos of the angle, so it was 8x10^-5 (if im right) x cos30

    For the parallel component you need to use the sin of the angle, so it was 8 x 10 ^-5 x sin30
    Are you sure it was ^ 10 -5 I thought it was ^ 10 5
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    (Original post by Legal drugdealer)
    were lol
    i see no mark scheme anywhere?!?! am i just being stupid
    • Thread Starter
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    you guys just like torturing yourselves for no reason, just wait till you get your marks stop estimating what you got that would be pointless!
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    (Original post by nickiminajs)
    Are you sure it was ^ 10 -5 I thought it was ^ 10 5
    its a raindrop, dont think it was going to be that heavy
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    Did anyone else complain about the spring question? The way it said spring a was extended aswell as spring b, instead of compressed for spring A? probably lost a few people marks! did it wrong at first til i used common sense and got 3.5! not too awful of a paper, easy to make silly mistakes, annoyingly i did 100000 cm3 in 1m3 but its 1000000 instead! ah!
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    (Original post by nickiminajs)
    Are you sure it was ^ 10 -5 I thought it was ^ 10 5
    i dont think a rain drop would have a force ( weight ) of 1000000N
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    (Original post by laurence231)
    Did anyone else complain about the spring question? The way it said spring a was extended aswell as spring b, instead of compressed for spring A? probably lost a few people marks! did it wrong at first til i used common sense and got 3.5! not too awful of a paper, easy to make silly mistakes, annoyingly i did 100000 cm3 in 1m3 but its 1000000 instead! ah!
    Both springs can be extended..it's just one was extended more than the other.
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    (Original post by mathphysics)
    i dont think a rain drop would have a force ( weight ) of 1000000N
    Hahahha oh yeah lol xD
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    (Original post by Joe899)
    Both springs can be extended..it's just one was extended more than the other.
    but spring a was compressed from 0.5 to 0.3 meters wasnt it? the wording of the question implied it was stretched i reckon! i might be wrong as im crap at reading questions fully anyway, aslong as others got 3.5ms^-2 then im happy!
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    (Original post by laurence231)
    but spring a was compressed from 0.5 to 0.3 meters wasnt it? the wording of the question implied it was stretched i reckon! i might be wrong as im crap at reading questions fully anyway, aslong as others got 3.5ms^-2 then im happy!
    Oh..I can't remember either to be honest, but I also got 3.5 for the acceleration
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    Was you allowed to do the arrow for the force on trolley in pencil?! :confused:
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    according to the unofficial mark scheme i have lost around 10 marks
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    (Original post by teachercol)
    Mty mark scheme posted.

    Electronic copies of the paper wont be available for quite some time
    Where have you posted your mark scheme? :/
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    (Original post by Joseph-)
    you guys just like torturing yourselves for no reason, just wait till you get your marks stop estimating what you got that would be pointless!
    Not really i can have rough estimate of how badly i've done so i dont end up crying in front of everyone on results day.
 
 
 
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