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# AQA Physics P2 - Unofficial Mark Scheme watch

1. What was the answer to the battery tick box question about 4.5v or something...
That exam was hard especially the graph question with the resistance or something😢
2. (Original post by harison291)
I put that the biggest mistake they could've made was not stopping the clock as soon as the ball bearing reaches a certain distance.
I'm not sure what the second part asked to get 0.01?
For the next part I don't remember the question
Then I put that it was timed before because the anomaly was after the best fit line so they must have started the time a bit before the ball bearing was dropped.
And the last part I think was about how the ball bearing reaches terminal velocity?
I wrote that there is drag at first but the weight of the ball speeds it up(accelerates). Then drag increases because of acceleration so it reach its highest velocity.
Please reply if you know the questions to the others one that i couldnt remember.
Yes that's pretty much exactly what i put for those questions too, there is a weight which is the downward force which is greater than the drag so a resultant force causes the ball to accelerate downwards, but as speed increases the drag increases and eventually mg = drag, thus there is no resultant force, so must be travelling at a steady speed, which is terminal velocity
3. (Original post by Cakes717)
What was the answer to the battery tick box question about 4.5v or something...
That exam was hard especially the graph question with the resistance or something😢
In a series circuit the voltages in the cell stack up so it was 9 + 3 v so 12v altogether the battery. it was the third one along because you had to make sure that the cells were all facing the same direction so the positive ends all had to be next to a negative end and vice versa, with the correct wiring in between.
4. (Original post by Youngey4)
Ayyyy I got 52W
How did you get 52W?
5. (Original post by Mmg 1111)
Why was it after?
Pretty sure it was before not after, because the time was longer, if it was after it would have been Shorter time for it to fall
6. (Original post by r_o_r_y)
Pretty sure it was before not after, because the time was longer, if it was after it would have been Shorter time for it to fall
it was before, if people disagree, then i'm not sure how they got to that answer
7. (Original post by BDunlop)
Yes that's pretty much exactly what i put for those questions too, there is a weight which is the downward force which is greater than the drag so a resultant force causes the ball to accelerate downwards, but as speed increases the drag increases and eventually mg = drag, thus there is no resultant force, so must be travelling at a steady speed, which is terminal velocity
] just put the downwards force eventually equalled the drag so it couldn't fall any faster
8. (Original post by BDunlop)
it was before, if people disagree, then i'm not sure how they got to that answer
I wrote before aswell because think about it. If you start the time before you drop the ball and stop it once it reaches say 10cm, the time would be longer because you started it beforehand. If you start it after it would be the opposite. The anomaly was on the right side of the best fit line and the x axis was time, so that result took longer, therefore they must have timed it too early.
Because the x was after the line of best fit. If it was before it was timed too early, if it was after, it was timed too late (after it dropped).
If it was timed before, the time taken to reach a certain distance would be longer, so therefore it should be before..?
10. There were a few questions on circuits. What wire connects to the fuse, what material is the socket pin made from, what material makes the socket cover, why are they suitable, what happens when the fuse breaks, how does the wire affect the wire (what??), draw an ammeter on the diagram, which diagram matches this circuit. That's all I can remember.
11. I'm really worried, I think I have got 44 on each paper and I don't know what the boundary would be for an A*. What UMS would 44 per paper be?
12. (Original post by steezus)
someone make one for foundation please
13. (Original post by r_o_r_y)
Pretty sure it was before not after, because the time was longer, if it was after it would have been Shorter time for it to fall
yeh i thought that too
14. (Original post by katekestell)
There were a few questions on circuits. What wire connects to the fuse, what material is the socket pin made from, what material makes the socket cover, why are they suitable, what happens when the fuse breaks, how does the wire affect the wire (what??), draw an ammeter on the diagram, which diagram matches this circuit. That's all I can remember.
The live wire connected to the fuse.
I put that the socket pin was made out of metal so they could conduct electricity?
I didn't get the how did the wire effect the wire question either. I ticked the third box for the circuit diagram.
15. Okay so did they start the stopwatch before or after because a lot of people in my year put after, but i put before?? I don't understand how it would be after if it took longer time
16. (Original post by r_o_r_y)
Pretty sure it was before not after, because the time was longer, if it was after it would have been Shorter time for it to fall
that was my thinking
17. There was I question that said the earth wire and the fuse prevents overheating and prevents a fire. (3 marks I think)
I put the fuse melts and that the earth wire takes the current and goes through the earth'a surface rather than the person.
18. The stopwatch was started too early because if you start it too early then it's going to give a time longer than what the actual time should have been, and because the anomalous result lay to the right of the line, considering the x axis was the time, then the time must've been too long- the only way this could of happened is if the time was started too early, otherwise the x point would lie to the left side of the line.
19. (Original post by dianmian12)
The live wire connected to the fuse.
I put that the socket pin was made out of metal so they could conduct electricity?
I didn't get the how did the wire effect the wire question either. I ticked the third box for the circuit diagram.
I put live brown wire, copper that has free electrons to conduct electricity, plastic to insulate, when the fuse breaks it shuts off the current and breaks the circuit, I just put that wire carried the current and I ticked the first box.
20. (Original post by dianmian12)
There was I question that said the earth wire and the fuse prevents overheating and prevents a fire. (3 marks I think)
I put the fuse melts and that the earth wire takes the current and goes through the earth'a surface rather than the person.
The surge goes through the earth wire first (i think) which causes the fuse to melt in the live wire due to a large curren, melting the fuse breaks the circuit and prevents the circuit from frying/overheating/setting on fire as it is isolated.

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