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# Official OCR Physics A G481 24th May June 2016 Watch

1. (Original post by _MAT_)
It's a question that has come up before

And some of the answers are discussed on the previous pages
Thank you
2. How much would it be for an A roughly?
3. Easy no?

Grade boundaries will be like 50+ for an A
4. (Original post by Reda2)
Thank you, do you remember the marks for the question where you had to find the time as well?

And if you finished on time, how do you do it?
Skip the questions you find difficult and come back to them
5. (Original post by _MAT_)
Skip the questions you find difficult and come back to them
Thanks mate
6. What were the two conserved physical quantities in the inelastic collision (comet or whatever)? I think it was 1 mark, i knew momentum was one, I didn't put kintetic energy because its not conserved in inelastic collisions, so randomly put mass lol. I heard someone say it was momentum and total energy is that right?
7. (Original post by JAFF2400)
What were the two conserved physical quantities in the inelastic collision (comet or whatever)? I think it was 1 mark, i knew momentum was one, I didn't put kintetic energy because its not conserved in inelastic collisions, so randomly put mass lol. I heard someone say it was momentum and total energy is that right?
I don't remember there being a collision question? Are you talking about the old spec G481?
8. (Original post by RBoss)
That's a better way to phrase it - I just wrote down the first thing which sprang to mind because of the time rush. You had to state 2 things though
it was a 2 marker :3
9. (Original post by _MAT_)
I don't think weight is a typically accepted answer, usually it's velocity, cross-sectional area, air density/temperature and surface texture I think
tbh i remember talking about drag forces with my physics teacher who often goes often topic, and its the area and inertia (but inertia aint in alevel)
10. (Original post by Yougo132)
I'm so pissed with that extension question. I believe the answer is 23mm, but I decided to divide by four at the end :/
I did exactly the same I times the area by 4 to account for 4 wires but then I stupidly divided by 4 at the end so I got 1/4 of the answer. Hopefully it will only be 1 mark lost
11. (Original post by _MAT_)
I don't remember there being a collision question? Are you talking about the old spec G481?
no, the paper that was at 3 hours ago today. There was collision questions, even the one when the electron hit the carbon/hydrogen atom and you had to work out velocity
12. 23mm, i got 2.3mm dunno how that happened
13. (Original post by JAFF2400)
no, the paper that was at 3 hours ago today. There was collision questions, even the one when the electron hit the carbon/hydrogen atom and you had to work out velocity
Is this for AS?
14. (Original post by JAFF2400)
no, the paper that was at 3 hours ago today. There was collision questions, even the one when the electron hit the carbon/hydrogen atom and you had to work out velocity
was the paper 1 hr long?
15. (Original post by JAFF2400)
no, the paper that was at 3 hours ago today. There was collision questions, even the one when the electron hit the carbon/hydrogen atom and you had to work out velocity
lool definitely wrong spec bro
16. LOOOOOL sorry guys this is the old spec my bad. I sat the new spec (from 2015)
17. Is there one for G482??? :// Im so not ready for this
18. (Original post by JAFF2400)
LOOOOOL sorry guys this is the old spec my bad. I sat the new spec (from 2015)
Ahahah thought you might have, hope your exam went well
19. (Original post by Reda2)
Thank you, do you remember the marks for the question where you had to find the time as well?

And if you finished on time, how do you do it?
it was 4 marks for that question

you were given YM, mass hence weight of container (massx9.81), number of cables, original length of cables, and cross section area of each cable.
i think YM was 2x10^11Pa, original length is 32m, dont quite remember the other values

so YM = ((F/4)/xsectionalArea)/(extension/32)
YM= (((F/4)/xsectionalArea)*32)/ extension [here is just a lot flippin around of numbers)
extension in meters = (((F/4)/xsectionalArea)*32)/YM
convert extension to mm
20. (Original post by Louisb19)
Easy no?

Grade boundaries will be like 50+ for an A
bruv. its not gonna 50+ for an A. chill.

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