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    How did people get 0ms^-2 for the acceleration?


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    (Original post by lilrabbits)
    How many marks off will I get if I drew the tension and friction force the opposite way round? Thanks!
    Probably none because its true, ur just looking at it from the other side of the block.
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    (Original post by rohan96)
    How did people find this compared with past papers?
    Awful!
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    (Original post by rohan96)
    How did people find this compared with past papers?
    I did question 1-6 in 45 mins then spent an hour on Q7 (extra time cos special needs)
    Question 7 (iii) is probably the hardest part i've seen. I was the only person in my class to get that answer.

    Probably going to have pretty low gradeboundaries honestly.
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    I couldn't do any of Q7, and I had a good look at it for 20 minutes! 18 marks gone - but I'm pretty sure I got absolutely everything else, based on what I've seen on here. Not sure if it was really hard or if it was just me having a mental block. Anyway, 52-54/72 is good for me and hopefully that's a B. Maybe I can get really lucky and have 54 as an A!
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    (Original post by phoebeisgreat)
    How did people get 0ms^-2 for the acceleration?


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    Put d in the equation of T in the previous part. After that, set the equation as Tsina+T2sinb-7500g=7500a if I am not wrong and then you get a=0
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    (Original post by prepdream)
    Put d in the equation of T in the previous part. After that, set the equation as Tsina+T2sinb-7500g=7500a if I am not wrong and then you get a=0
    But the mass of the bomb was not 7500kg, its weight was 7500N
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    Name:  1466190211034-1581749681.jpg
Views: 288
Size:  503.8 KB working for 7iv
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    (Original post by Synmatic)
    But the mass of the bomb was not 7500kg, its weight was 7500N
    if you do the arithmetic on the left hand side you get 0 if you use 7500N as weight.
    So if you use M = 7500 then you still get a=0 because 0/anything = 0.
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    so what were everyone's general thoughts? Hard paper, easy paper? (I have read the thread I just can't really tell mostly what people are thinking about it)
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    (Original post by leaf3)
    so what were everyone's general thoughts? Hard paper, easy paper? (I have read the thread I just can't really tell mostly what people are thinking about it)
    It was moderate-not easy but not difficult. What did you think?


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    (Original post by phoebeisgreat)
    It was moderate-not easy but not difficult. What did you think?


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    Yeah, I think harder than last years but not ridiculous, having said that I messed up the last question as I didn't spot a tiny arithmetic error I made right at the beginning (despite looking for about 10 times) which messed up practically everything after it... :P good luck for the rest of yours (unless you're done!)
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    (Original post by Synmatic)
    But the mass of the bomb was not 7500kg, its weight was 7500N
    Oh yes my apologies, it should be 7500. I just forgot the question really, but yeah set the equation like that with -7500 and a should be 0.
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    (Original post by Shipreck)
    Probably none because its true, ur just looking at it from the other side of the block.
    Thank you. What if I drew the arrow of the tension outwards rather than inwards? It probably matters?
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    (Original post by lilrabbits)
    Thank you. What if I drew the arrow of the tension outwards rather than inwards? It probably matters?
    What do you mean?
    Wasn't it being pulled to the left by 20N 60degrees to the horizontal?
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    (Original post by Shipreck)
    What do you mean?
    Wasn't it being pulled to the left by 20N 60degrees to the horizontal?
    Yes that's how I drew it, but apparently the question says "push" rather than "pull" so the arrow of the tension should be pointing in (
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    (Original post by Synmatic)
    Name:  1466190211034-1581749681.jpg
Views: 288
Size:  503.8 KB working for 7iv
    This is similar to my working but i rounded too early (was running out of time) so got a = 0.0027ms-2 Not sure how many marks id lose for that. Had no time to think about what to write for the last q so lost 2 marks on that.
    Overall think i lost 10marks on that paper at least which is dissapointing, considereing ive done every past paper and normally get ~90%raw
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    (Original post by lilrabbits)
    Yes that's how I drew it, but apparently the question says "push" rather than "pull" so the arrow of the tension should be pointing in (
    RIP I misread it too bro. We will most likely only miss 1 mark though, because the other forces were correct.
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    (Original post by Shipreck)
    RIP I misread it too bro. We will most likely only miss 1 mark though, because the other forces were correct.
    Yh hope so.
 
 
 
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