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OCR Physics A G481 Mechanics - 17th May

HarryW95

How did everybody find it?

Reply 1

Joseppea

Not too bad, apart from my mind went blank for the last question about turbines. -_-

Reply 2

omar1995

Original post by billybluehat

I'm so confused i dont know whether ive done well or not! Did anyone make the radius 9.96 or something like that for the wind turbine question?

Yep I got 9.99 so rounded it up to 10 metres

Reply 3

billybluehat

yess! haha do you know if anyone will put up any answers at some point? im eager to know how ive done!

Reply 4

emah123

is there an unofficial markscheme? can someone please make one, i would but i cannot remember all the questions!

Reply 5

teachercol

I'll post one up later - I've done the paper.

Reply 6

Eric_lee

the acceleration downwards is horizontal component of g,because resultant force is horizontal component of weight. so g*sinθ=acceleration.we already got the acceleration from previous part.

Reply 7

r_nws

Can someone make an unofficial markscheme please? :smile:

Reply 8

direct99

does anyone have unofficial mark scheme

Reply 9

patterson

Original post by teachercol

I'll post one up later - I've done the paper.

will you post it tonight or something???

Reply 10

oh_1993

is this the correct rule for sig figs (in OCR A-Level Physics exams):

Put your final answers to the same sig figs as the values given in the question are i.e. 10.0m(3sf) for the radius question because of the 1030 density (3sf)

Also, if the sf varies throughout given data, do you use largest sf or smallest that is given in question?

Thanks

Just started worrying about it as I suddenly realised I was not sure about the rule

Reply 11

etta

Original post by oh_1993

When looking at past mark schemes I don't think they take marks off you if you have the right answer I don't see why they would also in mark schemes they seem to give a few answers to different s.f so it should be ok

Reply 12

HarryW95

Doesn't sound like I did too good. People keep mentioning figures that don't ring any bells to me..
I got a C the first time round so I may have to settle with that.. :s-smilie:

Reply 13

Opasniipocik

Original post by HarryW95

Doesn't sound like I did too good. People keep mentioning figures that don't ring any bells to me..
I got a C the first time round so I may have to settle with that.. :s-smilie:

Saaame with me , but i think i can improve on this one , defoo got c , probs b , but certainly not a... :redface:

Reply 14

pcforster

Easy exam, all that revision paid off. That D i got in january scared me into me having no social life and just revising lol. But yeh, the exam was really good, dont think i dropped many marks at all :smile:

Reply 15

teachercol

Original post by patterson

will you post it tonight or something???

Here it is

http://www.thestudentroom.co.uk/showthread.php?t=2004925&p=37614962#post37614962

Reply 16

oh_1993

Original post by etta

Yes, I think the sf in mark schemes vary because of the sf given in the questions. They only take off 1 mark in the whole paper though for being too accurate apparently.

Reply 17

samiwami

Does anyone have the paper? The G481 May 2012 paper??? If anyone can get a hold of it...I love you

Reply 18

Aneesah_May

Original post by samiwami

Does anyone have the paper? The G481 May 2012 paper??? If anyone can get a hold of it...I love you

Original post by oh_1993

Yes, I think the sf in mark schemes vary because of the sf given in the questions. They only take off 1 mark in the whole paper though for being too accurate apparently.

Original post by teachercol

Here it is

http://www.thestudentroom.co.uk/showthread.php?t=2004925&p=37614962#post37614962

Original post by pcforster

Original post by Opasniipocik

Saaame with me , but i think i can improve on this one , defoo got c , probs b , but certainly not a... :redface:

Original post by HarryW95

Doesn't sound like I did too good. People keep mentioning figures that don't ring any bells to me..
I got a C the first time round so I may have to settle with that.. :s-smilie:

Original post by etta

Original post by oh_1993

Original post by patterson

will you post it tonight or something???

Original post by direct99

does anyone have unofficial mark scheme

Original post by r_nws

Can someone make an unofficial markscheme please? :smile:

Original post by Eric_lee

the acceleration downwards is horizontal component of g,because resultant force is horizontal component of weight. so g*sinθ=acceleration.we already got the acceleration from previous part.