OCR Physics A G484 - The Newtonian World - 11th June 2015

you know when we had to derive keplers third law, was that basically v=2pir/T, F=mv^2/r stuff, equating them and then subbing into F =GMm/r^2?

that's not as bad as what i did

i messed up 6 easy marks on shm questions- my brain just decided to quit
and i completely forgot about direction in momentum

i don't even know why the questions were worded so crap

where was the 41? i dont remember seeing that

what does everyone think an A grade will be?

Yup, I got 81 moles total i think. Not sure about the volume but I added both of them together.

lost 3 marks on first page- question made no sense
probably lost 1 mark for a- i got a negative sign but correct answer
lost 3 marks for explanation afterwards

lost 6 marks in shm- my graph was not negative gradient, messed up a/x and amplitude was not decreasing

lost 3 marks somewhere for sure for some of the explain questions

didn't add up volumes (i still think my answer is correct and you don't add volumes) 1 mark

so at best i think i can get 45-46 with follow through marks

did worse in this than f324 lol

40 exactly? I hope it's lower than last year, but I don't think they can even go that low

It wasn't really a hard paper I don't think...

Even thought I did ****, and will actually help lower the boundaries, it was just the psychological effects of not being able to do first q immediately.

Or second...

Or third...

****

Lmao jk

For the last question where it asks you to find the Pressure. What did you guys do.

This is what I did,

Since T was the same in the tank and the other thing (forgot what it was called) it meant that P1 xV1 = P2 x V2 cause of Boyales law.

You knew then volume of both tanks and you knew the preassure of the first tank so I just subbed in and that's how I got P2, not sure if I did it right, I feel like I missed something.

had to state newtons law of gravitation as a word equation hence you need to define G. another mark lost..