OCR Physics A G484 - The Newtonian World - 11th June 2015 Watch

steffanwb
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#1681
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#1681
(Original post by Cotcher)
For the describing acceleration from the graph question, the acceleration is ALWAYS increasing, because even though the force was decreasing, it was still a positive force. This meant that the RATE OF INCREASE of acceleration was decreasing, but the acceleration was still increasing
If there's a change in force there must be a change in acceleration, it might not be a negative acceleration. But it certainly decreases. Think it through, Force goes up and mass is constant so acceleration increases. If Force decreased and mass is constant the acceleration must decrease in value (still a positive value though)
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ninjasinpjs
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(Original post by ETRC)
42 the paper was not that difficult for the later questions but people would make mistakes because OCR cannot word questions properly
ok that's great I need low a or high b for an a overall! I hope =]
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Alex621
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#1683
http://youtu.be/DVYfKBwggGI

These are the only things that cheer me up after physics exams
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CowBoyFunSuck
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#1684
Boys read my lips... The exam was so easy literally, if any of you hardscopers don't get over 90% then you are all losers
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verello12
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(Original post by SH0405)
Has anyone got the paper itself?
I'd really love to obtain the paper, I don;t remember my answers but I remember what I did to solve it. Can you let me know if you manage to obtain the paper.
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rachelc142
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#1686
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#1686
(Original post by Jackasnacks)
Bollox
I did a acc-f graph
Goodbye 3 marks
Goodbye A
Goodbye uni
lmao I did exactly this too :'-(

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beebz97
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#1687
what is life when you have ocr as an exam board for physics
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Swinburne
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(Original post by ninjasinpjs)
what was 80ums last year? I don't have Microsoft edexcel to download the converter ._.

last year it was 39, 42 for 90ums
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alanconnel
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#1689
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#1689
(Original post by baner-2003)
Actually wanna dissapear. Bye bye medicine


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wow i have an offer for medicine too but physics does not form part of the offer. Me taking 5 A levels, if ihad took 3 A2's physics i defintely would have dropped far too difficult to an A in physics.
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ninjasinpjs
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(Original post by Swinburne)
last year it was 39, 42 for 90ums
website says 39 for 72 UMS, where did you get that value from?
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Swinburne
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(Original post by steffanwb)
If there's a change in force there must be a change in acceleration, it might not be a negative acceleration. But it certainly decreases. Think it through, Force goes up and mass is constant so force increases. If Force decreased and mass is constant the acceleration must decrease in value (still a positive value though)
yeah the acceleration would have decreased when the force went down but still been positive
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theelderpond
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#1692
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#1692
is there an unofficial mark scheme up anywhere yet?
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I Persia I
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#1693
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#1693
(Original post by ninjasinpjs)
website says 39 for 72 UMS, where did you get that value from?
He meant 90% but said 90 UMS.
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verello12
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#1694
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#1694
(Original post by steffanwb)
If there's a change in force there must be a change in acceleration, it might not be a negative acceleration. But it certainly decreases. Think it through, Force goes up and mass is constant so acceleration increases. If Force decreased and mass is constant the acceleration must decrease in value (still a positive value though)
Yup, object is still accelerating but the acceleration decreases, rate of increase of acceleration depends on the positive gradient. Rate of decrease of acceleraetion depends on the negative gradient to sum it up
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sagar448
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#1695
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#1695
Would I be right in saying that the grade boundaries for an A* for this paper will be 40-42? I think it was harder than last year...
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ninjasinpjs
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#1696
(Original post by I Persia I)
He meant 90% but said 90 UMS.
No... I think he meant 39 for A and 42 marks for 90 ums.
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Swinburne
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#1697
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#1697
(Original post by ninjasinpjs)
website says 39 for 72 UMS, where did you get that value from?
my bad, forgot the paper was out of 90ums, 39 was the boundary for an A you're right
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Ddddavies
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#1698
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#1698
(Original post by I Persia I)
He meant 90% but said 90 UMS.
so 3 marks between 80% and 90%?? seems way too close, is that the usual case?
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alanconnel
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#1699
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#1699
hurry up and do unofficial mark scheme you nerds
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verello12
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#1700
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#1700
(Original post by ImLiterally12)
I do seem to remember getting 41 moles of helium. I think i either got 86 total or I added 41 to 40 for some reason.
Pretty sure the number of mules of the first tank was givin in the question 45moles I think it was
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