You are Here: Home >< Physics

# AQA GCSE Physics Unit 2 and 3 (20th May) watch

1. (Original post by Harryffc)
You are wrong on the ke gpe and maximum height questions
Mass is measured in kg not g
Oh no you've lost 7marks
First of all;
Just to make things clear mass was 0.05kg and when working out kinetic energy units stay, Kg, m/s, J. Okay secondly it's 144x0.05x0.5 = 3.6 j.

Posted from TSR Mobile
2. (Original post by Ed Jeffrey)
you cant even lift a finger with 3 joules
It was a little rocket. Made out of paper 0.o

Posted from TSR Mobile
3. What did everyone get for the velocity time-graph question, it said maximum so it was 170/10 which was 17m/s?
4. Was the last question the one about the relationship between the range of the rocket and something else? Worried that I missed the last page
5. Yeah max I got the same for maximum and used that same method. I'm pretty sure it's right cos I checked all other points and they gave lower values.
6. I don't think so. For me the maximum is 22.5 since I used calculus to find the max

Posted from TSR Mobile
7. What did everyone get for the question about the resistance you need to say why she couldn't be certain that metal changes resistance or something
8. The 6marker was a trick question you had to talk about radioactive isotopes and there nuclear charges everyone messed it up
9. (Original post by cogito.)
I don't think so. For me the maximum is 22.5 since I used calculus to find the max

Posted from TSR Mobile
i got the same
10. (Original post by Harryffc)
The 6marker was a trick question you had to talk about radioactive isotopes and there nuclear charges everyone messed it up
really, it said just modern atom, charges and mass.
i got the same
I'm pretty sure we are right. But I'm wondering the AQA is not careful when asking such questions since it's logically impossible to find the 'point of maximum' on a changing velocity

Posted from TSR Mobile
12. (Original post by Samfurness98)
Exactly, it was 3600 j
If you used 3600 joules to calculate the next question, you would have the rocket launching kilometres into the atmosphere rather than a more appropriate 7.2m

Posted from TSR Mobile
13. (Original post by cogito.)
I'm pretty sure we are right. But I'm wondering the AQA is not careful when asking such questions since it's logically impossible to find the 'point of maximum' on a changing velocity

Posted from TSR Mobile
No because the graph curved, but when it was straight tge gradient of that line was at a steady speed. Therefore anywhere on that line was correct

Posted from TSR Mobile
14. http://www.thestudentroom.co.uk/show....php?t=3347943 P3 Unofficial Mark Scheme
15. (Original post by camz01)
was the eye one suspensory ligaments and retina ??!!
I put ciliary muscles
It was a little rocket. Made out of paper 0.o

Posted from TSR Mobile
I don't know, I'm confused!

You may be right.
17. http://www.thestudentroom.co.uk/show....php?t=3347943 P3 Unofficial Mark Scheme
18. (Original post by Harryffc)
You are wrong on the ke gpe and maximum height questions
Mass is measured in kg not g
Oh no you've lost 7marks
She wouldn't have lost 7 marks, most likely 1 or at most 2.

19. How did you get 22.5 for the velocity time-graph, it was just Speed= d/t, the maximum distance reached was 170 and it took 10 seconds, so 170/10 came out as 17m/s.
20. (Original post by Ankit.B)
it had to be right cos it was refracting idk what you did :l
Neither do I lol, apart from that it was fine

### Related university courses

TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

This forum is supported by:
Updated: August 23, 2015
Today on TSR

### A-Level OCR Biology Unofficial Markscheme

Find out how you've done here

### 2,577

students online now

Exam discussions

### Find your exam discussion here

Poll

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE