AQA (A Level) Paper 1 - 2020: Full Walkthrough and Explanations

These are my worked solutions to the AQA A Level Physics Paper 1 from 2020.

The views expressed in this video are my own and have not been seen, verified or officially endorsed by the exam board. I am responsible for the solutions and they have neither been provided nor approved by AQA and they may not necessarily constitute the only possible solutions.

In this video I refer to the AQA past paper, mark scheme, examiners' report and data sheet without showing any AQA copyrighted material. I am not directly quoting the text and I am showing my own worked solutions.

Thanks for watching,

Lewis
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[situ]

really appreciate the amount of effort that goes into these videos, especially when you pull out the legos and the actual electrical components to help us understand better

[scorpius]

TRIGGER WARNING: high pitched and loud[in comparison to Lewis's voice] in question 3 if you have audio sensory issues turn the volume down/use subtitles. Apart from that great video :)

[edforever]

found this really helpful, will you be doing the 2020 paper 2 and 3?

[georgia]

For question 1.3, why couldn't strange, anti-down be the quark configuration of the normal kaon? In the mark scheme it says that you would lose a mark for getting the quark configurations the wrong way round, but I don't understand how you would know which way is the right way around :(

[davidphelan]

Thank you so much, this was beyond helpful! I and I'm sure many others really appreciate this 😁 I hope you're doing well!

[randomchild]

just a quick question, for example at 37:34, if I leave my final answer as 0.375A as any normal person would, I wouldn't lose any marks would I??

I'm assuming not!

[sarujanrupan]

For question 22 it looks like kinetic energy has not been conserved. The pellet has kinetic energy of 100 Joules before hitting block. But after collision pellet and block combined only have kinetic energy of 5 Joules. (Before collision: Ek = 0.5*0.005*(200)^2, After collision: Ek = 0.5*0.1*(10)^2)
What am I doing wrong here?

[DopeAK]

So for 3.2 is there any reason why we can't state that it constructively interferes instead of superposing because in the mark scheme it says to reject "interfere"

[niall]

on question 29 the voltmeter is around the cell in the paper
which changes thee answer?

[Cars.r.us]

q 4.1 i worked out the average speed during each interval and for how long then did the average of the averages and got the right answer but in the mark scheme its not given as a viable method jw wheter you thought that with full workings that method is also worthy of the marks as ik that sometimes my teachers tell me wrong method no marks

[atm__]

Hey, for q5.4 why couldn’t you find the current and also the new voltage that would be going through the lamps and then the new power being given out which would be much lower?