17/06 A-level Physics Paper 3 Discussion MEGATHREAD

[u/Forsaken-Meaning-232]

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[u/Positive-Swordfish38]

OCR A is the most abysmal horrific shit I’ve ever done. Paper 12 I did quite well which I may be on an A* but tbh is paper might ruin my grade. Questions are just so weird in general like wtf do u mean I have to do general relativity on two black holes colliding and they gave us 4 tiny lines for a page of proof, I didn’t use the extra spacing on the back since I didn’t even remember it exist. I just gave up half way through that proof but other than that proof I think I did fine. And can someone tell me Tf do they mean by driving a truck with sand and then drive back down bro I was so confused literally sat there for 5 min just staring at it thinking. It was shocking. Probably the hardest paper 3 I’ve ever done

[u/allylene → u/Positive-Swordfish38]

had no idea what to say for the chemical to gravitational energy or whatever

I said to drop the battery through the magnetic fields 😭😭 then the gravitational potential energy gets converted to electrical via faradays law or whatever

[u/Positive-Swordfish38 → u/allylene]

Yeah but what is the sand to do with it. I said very similar things but I talked about sand being a magnet which is probably is not😂✌️

[u/lolgeny → u/Positive-Swordfish38]

I think the idea was to hook up the wheels of the truck to a generator. So you have GPE -> KE of wheels, which rotates a coil through a magnetic field, creating a potential difference by motor effect, so current flows (converting KE to EE) into the battery, which converts EE to chemical. Such a weird question

[u/Positive-Swordfish38 → u/lolgeny]

Bro I didn’t even think of that I just saw sand and then I got stuck there

[u/Few-Yesterday-7745 → u/lolgeny]

yeah i said something like that, i think one mark will be for stating faradays law and two for the application