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OCR Physics A Breadth of Physics (24th May 2016) Discussion watch

1. how did did you do the density question can someone explain please?
2. (Original post by mm_7)
do you think that depth will be as hard as todays paper?
Going off the bs paper I got for my mock for depth I'm guessing harder.
3. (Original post by mm_7)
do you think that depth will be as hard as todays paper?
I think it will be slightly harder because they didnt ask anything on quantum or materials- they could have two experiment questions to do with Young Modulus or Planck's Constant... thats what I'm predicting
4. Any clue on grade boundaries since in the old spec around 70% was an A so with a new spec and tricky questions I'm guessing it won't be high. Probably around 60% to 70%?
5. something about the braking distance, graph does not pass the original why error does not affect value something how did you guys explain that
6. i think there will be moments and projectile motion on depth also since it was not on the breadth
7. (Original post by Parhomus)
Any clue on grade boundaries since in the old spec around 70% was an A so with a new spec and tricky questions I'm guessing it won't be high. Probably around 60% to 70%?
Only asking because I need a high A like above 90ums and I made a couple silly mistakes.
8. (Original post by WhizzKidhehe:))
I think it will be slightly harder because they didnt ask anything on quantum or materials- they could have two experiment questions to do with Young Modulus or Planck's Constant... thats what I'm predicting
😭😭🔫 I found this difficult and the fact that the next one is harder 😭 Wow.. there goes my AS grade
9. did everyone find it difficult or is it just me?
11. (Original post by whyyy)
how did did you do the density question can someone explain please?
Work out the weight of water displaced (9.0-7.8) = 1.2N

Calculate the volume of water displaced: ((1.2/9.81))/1000 = 1.22324159x10^-4

This is equal to the volume of the whole object submerged.

Calculate the density of the object: ((9.0/9.81)/1.223324159x10^-4

That equals density = 7500kgm^-3
12. (Original post by chenhao96)
something about the braking distance, graph does not pass the original why error does not affect value something how did you guys explain that
because the gradient tells you the acceleration and as all the values changed by the same amount, gradient is unaffected, so value for acceleration is unaffected.
13. (Original post by mm_7)
😭😭🔫 I found this difficult and the fact that the next one is harder 😭 Wow.. there goes my AS grade
Trust, it will actually not be that bad. I also predict percentage uncertainties and drawing graphs will come up as well. Just try to focus on getting these things all ok and learn the experiments, it will actually not be too bad.

I found the multiple choice harder than the rest of the paper!
14. (Original post by WhizzKidhehe:))
Trust, it will actually not be that bad. I also predict percentage uncertainties and drawing graphs will come up as well. Just try to focus on getting these things all ok and learn the experiments, it will actually not be too bad.

I found the multiple choice harder than the rest of the paper!
Same! I guessed 10 out of the 20 questions!
How did you think you did overall?
15. (Original post by mm_7)
I think 54/70 for A
47/70 for B
40/70 for C
33/70 for D
16. (Original post by WhizzKidhehe:))
I got 78.2 m/s
I got 6.8 aswell but a lot of people got 78.2:/
17. Same, how many silly mistakes do you think you made? I know I made a few marks worth and have probably lost marks elsewhere (e.g. how to get that third mark for the LED question)...
18. Does anyone remember the multiple choice uncertainty question? It was like +- 0.1 and +-0.4? What was the rest of the numbers?
19. (Original post by WhizzKidhehe:))
I think 54/70 for A
47/70 for B
40/70 for C
33/70 for D
I honestly think I got less than 30 ..
20. (Original post by mm_7)
Same! I guessed 10 out of the 20 questions!
How did you think you did overall?
I made some stupid mistakes for multiple choice like the second one: Work done against gravity- I used perpendicular distance thinking it was moments but it was in the direction of force... damn.

But overall, i think Ive done alright, not too bad

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