You are Here: Home

# 21st Century Science GCSE Unit 2 P4P5P6 - Thursday 2nd February 2012 Tweet

Physics exam discussion - share revision tips in preparation for GCSE, A Level and other physics exams and discuss how they went afterwards.

Announcements Posted on
Enter our travel-writing competition for the chance to win a Nikon 1 J3 camera 20-05-2013
IMPORTANT: You must wait until midnight (morning exams)/4.30AM (afternoon exams) to discuss Edexcel exams and until 1pm/6pm the following day for STEP and IB exams. Please read before posting, including for rules for practical and oral exams. 28-04-2013
1. Re: 21st Century Science GCSE Unit 2 P4P5P6 - Thursday 2nd February 2012
Anyone write 10000N for the one which stops the motorbike/car in 5 second?

Rearrange it? so Change/Time = Resultant force?

50000/5 = 10000N?

Imo sounds more likely than 4N to stop a car travelling at 20m/s in 5 seconds... :L but alot of people had various answers
2. Re: 21st Century Science GCSE Unit 2 P4P5P6 - Thursday 2nd February 2012
looking at all these answers makes me feel sick lol!
i did it all wrong... hopefully the boundaries are really low
3. Re: 21st Century Science GCSE Unit 2 P4P5P6 - Thursday 2nd February 2012
(Original post by lucasluke)
looking at all these answers makes me feel sick lol!
i did it all wrong... hopefully the boundaries are really low
I know exactly how you feel.
4. Re: 21st Century Science GCSE Unit 2 P4P5P6 - Thursday 2nd February 2012
(Original post by bookworm786)
Lol i hope everyone else fails too
urrrrgh. I am one of these failures
gonna fail so badly. would be ELATED if I manage an A by accident (or pure luck )
5. Re: 21st Century Science GCSE Unit 2 P4P5P6 - Thursday 2nd February 2012
(Original post by jLou711)
Anyone write 10000N for the one which stops the motorbike/car in 5 second?

Rearrange it? so Change/Time = Resultant force?

50000/5 = 10000N?

Imo sounds more likely than 4N to stop a car travelling at 20m/s in 5 seconds... :L but alot of people had various answers
well... it does sound reasonable if the answer is 4N because if you imagine someone pulling the motorbike 4Kg every second, that does add up to 20 (if you do 4Kg x 5s), meaning in 5 seconds, the motorbike will stop.

10000N??? Doesn't sound reasonable...
6. Re: 21st Century Science GCSE Unit 2 P4P5P6 - Thursday 2nd February 2012
(Original post by TwlilightLoz)
well... it does sound reasonable if the answer is 4N because if you imagine someone pulling the motorbike 4Kg every second, that does add up to 20 (if you do 4Kg x 5s), meaning in 5 seconds, the motorbike will stop.

10000N??? Doesn't sound reasonable...
4N is not 4kg

40N is 4kg

20m/s is roughly 45mph..
7. Re: 21st Century Science GCSE Unit 2 P4P5P6 - Thursday 2nd February 2012
what did people put for the 'friction' question? hateeed ALL the calc questions
8. Re: 21st Century Science GCSE Unit 2 P4P5P6 - Thursday 2nd February 2012
I put 1000N for the force one...
& What did people put for the total internal reflection one?
9. Re: 21st Century Science GCSE Unit 2 P4P5P6 - Thursday 2nd February 2012
(Original post by Angelica.)
I put 1000N for the force one...
& What did people put for the total internal reflection one?
internal
reflection
refraction
90

or do you mean the diagram?
10. Re: 21st Century Science GCSE Unit 2 P4P5P6 - Thursday 2nd February 2012
yeah, the diagram, there was a bit of confusion
11. Re: 21st Century Science GCSE Unit 2 P4P5P6 - Thursday 2nd February 2012
(Original post by Angelica.)
yeah, the diagram, there was a bit of confusion
don't know how to describe it...

I drew it as if it was being reflected. cos I had no idea what to do.
12. Re: 21st Century Science GCSE Unit 2 P4P5P6 - Thursday 2nd February 2012
do you reckon the boundary for an A* will be like 35 or 36 or do you think the boundary will be lower than the recent paper where it was 27 so do you reckon it'll be like 24/25/26 for an A*?
13. Re: 21st Century Science GCSE Unit 2 P4P5P6 - Thursday 2nd February 2012
i drew it inside, but my line went outside the block... I think it may remain same.. I doubt OCR will drop the boundary below 27 for an A*. Depends though on how the country performed... they look pretty bad if everyone fails
14. Re: 21st Century Science GCSE Unit 2 P4P5P6 - Thursday 2nd February 2012
(Original post by science-oliver)
do you reckon the boundary for an A* will be like 35 or 36 or do you think the boundary will be lower than the recent paper where it was 27 so do you reckon it'll be like 24/25/26 for an A*?
most people I have spoken to are like 'it was SOOO hard'. others are like 'it was okay'.

I think its gonna be around the 28/30 mark for an A*. no lower.

defo won't drop lower than 27.
15. Re: 21st Century Science GCSE Unit 2 P4P5P6 - Thursday 2nd February 2012
Yeah.. any others anyone wanted to discuss?
16. Re: 21st Century Science GCSE Unit 2 P4P5P6 - Thursday 2nd February 2012
What did you put for the last question?
17. Re: 21st Century Science GCSE Unit 2 P4P5P6 - Thursday 2nd February 2012
(Original post by (L)*)
What did you put for the last question?
The answer to the last Question was the bottom tick box.
18. Re: 21st Century Science GCSE Unit 2 P4P5P6 - Thursday 2nd February 2012
What did everyone choose for the person with the incorrect statement?

I picked Darrel.
19. Re: 21st Century Science GCSE Unit 2 P4P5P6 - Thursday 2nd February 2012
(Original post by the A* guy)
The answer to the last Question was the bottom tick box.
I can't even remember what I ticked now.

URGH

thankyou
20. Re: 21st Century Science GCSE Unit 2 P4P5P6 - Thursday 2nd February 2012
(Original post by the A* guy)
What did everyone choose for the person with the incorrect statement?

I picked Darrel.
same here
Useful resources

## Articles:

Study Help rules and posting guidelinesStudy Help Member of the Month nominations

## Groups associated with this forum:

View associated groups