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    (Original post by madrevision)
    I did b-a (because they were acting in opposite directions )to find the net force and then used F=ma so a= F/m.. If we are talking about the same question
    yeha same question, people seem to have done that, but i thoght that b was pulling the truck thing and a was pushing it so b+a
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    Found this paper so hard, so annoyed as all the mocks went well but this was just completely different. From what I've read I lost at least about 30 marks
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    I'll make a poll thread about how hard people found it.
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    has anyone got the paper?
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    (Original post by Serhat5991)
    raw mark for 90ums is always 60/60. has anyone got the paper can you please email it to me..
    No, not always. Look at this thread about the N grade.
    http://www.thestudentroom.co.uk/showthread.php?t=649874

    Also here is the poll: http://www.thestudentroom.co.uk/show....php?t=2357507
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    (Original post by josephguen94)
    Do you know for the terminal velocity question is it ok if i said weight = upthrust ?
    yeah i think that will be ok, thats what my friend said
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    (Original post by dakenSoren)
    No, not always. Look at this thread about the N grade.
    http://www.thestudentroom.co.uk/showthread.php?t=649874

    Also here is the poll: http://www.thestudentroom.co.uk/show....php?t=2357507
    dno i did my exam jan it was 60 was 90 ums
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    For the component question ( I think it was Q2 or Q3 ) I didn't actually calculate it.

    I wrote 5sin30, and 13cos30 ( I made up the numbers, can't remember the actual numbers)

    Is that right or did u have to calculate it
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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 these)

    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

    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 did youre trolley one was the same as mine
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    I actually got 40/60 in the January mock without prep. and definitely found this harder, it would be a crime if the grade boundaries aren't at least the same as the January exam.
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    post the paper pls
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    What did people get for the question with the Force (R) and Force (F) of the water droplet on the window. (8.0*10-5N)

    i put 1.6 or something then scribbled it out and put 4.2 or something
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    Thought there were a few tricky ones. What did everyone do for the decelleration of the ball in the oil? It was a curved line of best fit.
    Also did you have to change the stress into anything? It was in %
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    It's got to be about 40-43 for an A even when you consider the June exams are higher boundaries... so many people found it difficult, even those you'd expect to be able to it all.
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    (Original post by Vorsah)
    For the component question ( I think it was Q2 or Q3 ) I didn't actually calculate it.

    I wrote 5sin30, and 13cos30 ( I made up the numbers, can't remember the actual numbers)

    Is that right or did u have to calculate it
    You'd get method marks, if they award any. But I think you need the actual answer.
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    how many marks was the ratio question. I think i got that wrong but the others seem fine though. So glad there aren't any questions about experiment procedures
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    (Original post by mathphysics)
    What did people get for the question with the Force (R) and Force (F) of the water droplet on the window. (8.0*10-5N)

    i put 1.6 or something then scribbled it out and put 4.2 or something
    i put it was the same as the component of the weight down the slope/parallel to the slope since the raindrop is stationary
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    (Original post by MikeyP96)
    i did youre trolley one was the same as mine

    woop! although looking at teachercol's post has dampened my spirits lol
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    Has anyone got a electrical copy of the paper???
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    does it matter if you leave the ratio as 1.73/0.63? not sure if they were the right numbers :rolleyes:
 
 
 
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