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Edexcel Physics Unit 2 "Physics at work" June 2013

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Reply 920
Avatar for Nathan@
Nathan@
My estimate of grade boundaries is 58/59 for an A, anyone any suggestions ?:holmes:
Original post by Nathan@
My estimate of grade boundaries is 58/59 for an A, anyone any suggestions ?:holmes:


Too high IMO. 55. Its hardly that high for easy Unit 1 June paper, let alone a medium difficulty Unit 2 June Paper
Reply 922
Avatar for a10
a10
19
Original post by Nathan@
My estimate of grade boundaries is 58/59 for an A, anyone any suggestions ?:holmes:


its never been that high for unit 2, it was the same difficulty as jan 13 so I would say 56 A
Reply 923
Avatar for Nathan@
Nathan@
Original post by GCSE-help
Too high IMO. 55. Its hardly that high for easy Unit 1 June paper, let alone a medium difficulty Unit 2 June Paper


Wait, you think that this exam was harder than the unit 1 ?
I think that initially this paper seemed all right and most of the answers i put were right, then you realise that there were a lot of trick questions that could catch you out so imo i agree with the above 55 should be an A
Reply 925
Avatar for hamzeh h
hamzeh h
56-58
Original post by Nathan@
Wait, you think that this exam was harder than the unit 1 ?


Haha no, but I'm saying even easy Unit 1 papers nromally have grade boundaries below 59.So its unlikely that a medium Unit 2 paper like this one will be 59.
Reply 927
Avatar for Nathan@
Nathan@
Original post by GCSE-help
Haha no, but I'm saying even easy Unit 1 papers nromally have grade boundaries below 59.So its unlikely that a medium Unit 2 paper like this one will be 59.


Oh PHEW!!! :colondollar:
Reply 928
Avatar for Jaydude
Jaydude
11
Really? 59 for an A? I thought it was harder than jan 13 paper...anyone? :frown:


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Reply 929
Avatar for a10
a10
19
Original post by GCSE-help
Haha no, but I'm saying even easy Unit 1 papers nromally have grade boundaries below 59.So its unlikely that a medium Unit 2 paper like this one will be 59.


I have to say edexcel are unpredictable bastards, for unit 4 it was a medium difficulty paper and the highest grade boundaries for that was 55 for an A and this year they increased each grade by 10 so it was something like 61 for an A and a 54 was a C grade...
(edited 10 years ago)
Original post by a10
I have to say edexcel are unpredictable bastards, for unit 4 it was a medium difficulty paper and the highest grade boundaries for that was 55 for an A and this year they increased each grade by 10 so it was something like 61 for an A and a 54 was a C grade...


Hmm yeah you always get the odd shocker but mostly things stay normal. It's always good when there are some hard questions too, and this paper has that last question which people are still undecided over :colondollar:
Reply 931
Avatar for Nathan@
Nathan@
Guys, weird question not really quoting an answer just making it up but say someone writes resistance goes up and says that I is proportional to A from the equation I=NqvA but the mark scheme says that 1 mark for getting resistance goes down and 1 mark for saying I is proportional to A or ref to I=NQVA

would 1 mark BE GIVEN OR NOT?:hmmmm2:
Reply 932
Avatar for hamzeh h
hamzeh h
Original post by a10
I have to say edexcel are unpredictable bastards, for unit 4 it was a medium difficulty paper and the highest grade boundaries for that was 55 for an A and this year they increased each grade by 10 so it was something like 61 for an A and a 54 was a C grade...

its true this year it was 64 for an A and the highest unit 4 boundary i saw was 56 but lets hope unit 2 wont be the same
Just need some physics genius to confirm the answer for the last question. Anyone know if they can get some proper confirmation from anywhere?
Was the gradient for the V I graph negative or positive?????
Original post by Mo_maths
Was the gradient for the V I graph negative or positive?????

Negative. At least I hope so.
Reply 936
Avatar for hamzeh h
hamzeh h
Original post by Mo_maths
Was the gradient for the V I graph negative or positive?????

negative
The efficiency question in multiple choice is mgh/VIt It's in a book I have.

efficiency of power output= Pout/Pin

Pout=mgh/t
Pin=IV

combining the two gives mgh/VIt

the experiment raises a mass a certain height and it's GPE calculated
Original post by ALevel96
The efficiency question in multiple choice is mgh/VIt It's in a book I have.

efficiency of power output= Pout/Pin

Pout=mgh/t
Pin=IV

combining the two gives mgh/VIt

the experiment raises a mass a certain height and it's GPE calculated


But the useful energy was the kinetic energy of the mass being raised, not the gravitational potential energy.
Reply 939
Avatar for hamzeh h
hamzeh h
Original post by CharlieTT
But the useful energy was the kinetic energy of the mass being raised, not the gravitational potential energy.

but V was constant so u mean lifting it 200 Meters and lifting it 1 meter would give same usefull power output ?

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