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# AQA Physics GCSE P2 & P3 [OFFICIAL THREAD] watch

1. (Original post by 11Jason11)
I put Velocity decrease too-- can't remember my justification
I think I said something really terrible like 'the force of gravity would pull it down and air resistance will cause it to slow down'

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2. (Original post by AvKar)
I don't remember doing some of these questions! Like the 'Michael Faraday' one or 'natural resource of fission'! What paper did you do?
PH2HP
3. (Original post by docilechic)
For 1a I put something like they are straight lines and there is no axis for temperature
is that wrong because it seems stupid?

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Yeah, I put that it was a straight line graph and directly proportional so one of them should be right I hope

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4. (Original post by Eshanth)
For P3 power of his eyes question was 50 which i initially wrote but then crossed it out and wrote 0.5 so i lost 3 marks for that
I had no idea how to do this, for some reason I did 10-2=8 and then 1/8=0.125m so I hope I might be able to pick up 1 mark for units and maybe a second for the equation if the mark scheme is kind to me

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5. (Original post by amymcavoy22)
I think I said something really terrible like 'the force of gravity would pull it down and air resistance will cause it to slow down'

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yeah...but the questions were kinda vague so i hope they'll maybe give it one mark or something...
6. (Original post by PawanAviator)
P3

The pendulum
Q1) 1.25s
b) write 2 conclusions

- as the mass increases no change occurs
- as the length increases the more oscillations which occur

c) write 2 improvements
-repeat more than 3 times
use more weights to test the experiment

Centripetal force and centre of mass
Q2 )
a) D
b) friction - what causes the centripetal force?
c) write 2 factors affecting centripetal force :
- speed
d) why is an F1 car so stable?
-wide base
-short height
Q3 )
mimimum ultrasound = 20000Hz
xrays have the same wavelength which has the same diameter as an atom

- 6 marker Xrays and ultrasound applications and risks and precautions

Q4) the eye
a) A - ciliary muscles
B - retina

b)what is the function of the iris?

to control the light entering the eye

c)short sighted

d) diverging lens diagram

e) why is the power of lens important?

because it controls the thickness of the lens

f) cant remember. there was a graph
e) 0.5m
g)explain the trend from 10 to 30 then 50 to 70 years of age
decreases constantly from 10 to 30
decreases greatly from 50 to 70 then levels off.
h) why is it better for eye lens to be thinner?
so it is much cheaper to maunfacture

Q5) Motor effect
a) why is a force created between X and Y?
basically , a current is induced causing the current to move from X to Y which creates a force due to the magnets creating a magnetic field creating a force coming outwards
b) draw an arrow (X to y)
c) what is the name of this effect?
the motor effect
d) the battery is replaced by an alternating current
what happens to the movements?

- changes direction

di) why?

alternating current flows in 2 directions.

Q6) refractive index

a) r needs to be 90 degrees and stay within the glass.

can't remember

b) calculate the critical angle
1.52 = n (something around that)

c) air --> water

angle of refraction = 26.2 degrees

Q7)

a)when/why does the bus topple over?

when the centre of mass is outside the base of the bus. this is when the line of action faces towards the ground making it topple over.

b) why is it important for these test to be done?

incase if the driver does a sharp turn
incase if the weather conditions are bad

c) hydraulic

force = 84000N

Q8) how is the voltage created the secondary coil.

this is called electromagnetic induction. what happens is an alternative current is passed through the primary coil which induces an alternating magnetic field through the soft iron core. this is because it has magnetic properties which transmits this magnetic field to the other secondary coil which then induces a magnetic current cauing this voltage to be created

b) 18 turns
Thank you! I got most of these right- So I am very happy!
7. (Original post by Smile Generator)
yeah...but the questions were kinda vague so i hope they'll maybe give it one mark or something...
There were so many vague questions which is why I'm so worried about it

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8. (Original post by 11Jason11)
P3
1a) Retina
Suspensory Ligaments
you know , i put that in the exam actually.
sorry , you are right!
9. (Original post by Pra99)
I bet my house that the 6 marker in p2 will be about stars
10. does anyone remember what question said ignore resistance and which one said take it into consideration
11. (Original post by 11Jason11)
Thank you! I got most of these right- So I am very happy!
anytime
12. (Original post by amymcavoy22)
Ah yes I forgot about that mistake until now

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13. (Original post by 11Jason11)
I put Velocity decrease too-- can't remember my justification
I put that the velocity would decrease initially and then stay steady because the air resistance on it increases as the speed increases so it would slow down and then the weight and air resistance would be equal

But now I don't think that's right

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14. (Original post by amymcavoy22)
There were so many vague questions which is why I'm so worried about it

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Yeah me too, but maybe that means less people would have gotten the marks and the grade boundaries will be around 45 for an A*.

Prays furiously
15. (Original post by amymcavoy22)
I had no idea how to do this, for some reason I did 10-2=8 and then 1/8=0.125m so I hope I might be able to pick up 1 mark for units and maybe a second for the equation if the mark scheme is kind to me

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I did this!

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16. (Original post by lewiswallis)
No idea but my answer just doesn't seem right so I'm not expecting anything from that question

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17. Why was p2 soo hard

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18. (Original post by Humzaawan123)
Overall how would you rank all the exams (B3,B2,C2,C3,P2,P3) from the easiest and ones you did best in , to the hardest and the ones you did worst in. For me it's: easiest: B2
C2
C3
B3
P2
Hardest: P3

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Same!
19. Who found p3 easier than p2

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20. Anyone got pictures of the papers?

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