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

1. (Original post by amymcavoy22)
The gravitational potential energy gained=kinetic energy lost so the GPE and Ek where just the same. To find the change in height you just had to rearrange the equation using the number you got for GPE
Think I put 7.2?
2. (Original post by Olmeister)
For the one in P2 where you had to write where nuclear fusion occurs naturally.. I simply wrote 'Star'... WOULD THIS BE ACCEPTED??? I'm upset I didn't put 'Stars'...
I'm pretty sure you'd still get the mark. It's basically the same thing
3. Does anyone have the unofficial mark scheme for P2?
4. (Original post by Jjohnson919)
Think I put 7.2?
Yeah that's what most people got, I put 0.6 but I'm 99% I got that one wrong so I'm pretty jealous of your likely success right now
5. Anyone remember the answer to hydraulics q?
6. (Original post by amymcavoy22)
The gravitational potential energy gained=kinetic energy lost so the GPE and Ek where just the same. To find the change in height you just had to rearrange the equation using the number you got for GPE
Wow I wasn't taught that. Thanks anyway. How did people get 3.6 and 7.2?
7. (Original post by Jjohnson919)
Anyone remember the answer to hydraulics q?
84000 newtons
8. (Original post by Pra99)
84000 newtons
Love that❤️
9. So guys you know for P3, the maximum energy, I got 7.2J because I done 0.05(mass)*12 squared(velocity) and for the distance it travelled I got 28.8 or something like that what did you guys get?
10. (Original post by Pra99)
Wow I wasn't taught that. Thanks anyway. How did people get 3.6 and 7.2?
My memory might be wrong but I think the velocity was 12m/s and the mass was 0.6kg so they will have done 12 x 0.6 x 0.5 = 3.6
However it should be velocity squared so I really don't know considering I somehow got 0.3
11. (Original post by amymcavoy22)
My memory might be wrong but I think the velocity was 12m/s and the mass was 0.6kg so they will have done 12 x 0.6 x 0.5 = 3.6
However it should be velocity squared so I really don't know considering I somehow got 0.3
Thanks! Shouldn't there be a x10 somewhere because the grav field strength is 10
12. (Original post by Not_a_horse)
So guys you know for P3, the maximum energy, I got 7.2J because I done 0.05(distance)*12 squared(velocity) and for the distance it travelled I got 28.8 or something like that what did you guys get?
It should be 3.6J because the equation is Ek = 1/2 * mass * speed^2

I don't remember the distance q, what was it?
13. on P2 can anyone explain the graph for the rocket?
People are saying either B or C but I just can't understand why it isn't A.
The question said choose the graph that shows how velocity changes as the rocket falls until just after it hits the ground. surely when it hits the ground velocity would have to be 0, because it's no longer moving, and graph A was the only one that finished at the x axis - 0 ????
14. Im still sittin here, waitin for dat mark scheme. how long guyysssss
15. (Original post by Not_a_horse)
So guys you know for P3, the maximum energy, I got 7.2J because I done 0.05(mass)*12 squared(velocity) and for the distance it travelled I got 28.8 or something like that what did you guys get?
7.2J it was 0.28 x 300000
16. (Original post by amymcavoy22)
My memory might be wrong but I think the velocity was 12m/s and the mass was 0.6kg so they will have done 12 x 0.6 x 0.5 = 3.6
However it should be velocity squared so I really don't know considering I somehow got 0.3
I think the mass was 0.05 and the speed was 12.
17. (Original post by morrissies)
on P2 can anyone explain the graph for the rocket?
People are saying either B or C but I just can't understand why it isn't A.
The question said choose the graph that shows how velocity changes as the rocket falls until just after it hits the ground. surely when it hits the ground velocity would have to be 0, because it's no longer moving, and graph A was the only one that finished at the x axis - 0 ????
I put A. How on earth would it be C if it is losing time?
18. (Original post by morrissies)
on P2 can anyone explain the graph for the rocket?
People are saying either B or C but I just can't understand why it isn't A.
The question said choose the graph that shows how velocity changes as the rocket falls until just after it hits the ground. surely when it hits the ground velocity would have to be 0, because it's no longer moving, and graph A was the only one that finished at the x axis - 0 ????
I put B, because it accelerated then levelled off, so i thought that showed terminal velocity... idk for sure though
19. (Original post by morrissies)
on P2 can anyone explain the graph for the rocket?
People are saying either B or C but I just can't understand why it isn't A.
The question said choose the graph that shows how velocity changes as the rocket falls until just after it hits the ground. surely when it hits the ground velocity would have to be 0, because it's no longer moving, and graph A was the only one that finished at the x axis - 0 ????
I honestly thought A was right but I don't know 😕

The roots of education are bitter, however the fruit is sweet.
20. (Original post by Pra99)
Thanks! Shouldn't there be a x10 somewhere because the grav field strength is 10
Yeah somewhere but I have no idea how I got from 0.3 to 0.6 or how anyone got from 3.6 to 7.2, I've completely forgotten sorry :/

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