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

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no idea
i'm sure ocr is gonna find a way to mess us up even more with their crap

Trust me these man change their opinions on what's right or not in the space of 6 months. The mark scheme is disgusting to look at

Reply 1661

ETRC

Original post by verello12

Man I prepared for this exam so hard, I did all the past papers all the way back to 2009, I did each past paper like 3 times over, made tons of notes, memorized everythng, I was feeling like I'd get 100% or 90% at least, There was no brownian motion question, no list assumptiuons of kinetic model, no 'how preassure exerts walls on gas', no experiments of any kind. Question 1 was utter bullshet, question 2 was pretty difficult.

Now I'm scared I won't even get 59 UMS points ( that's what I need). I know I lost 10 marks for sure probably more.

I feel terrible right now......

How many marks do you recon I need for 59 UMS points

i was so pissed there was no brownian motion or circular motion
those come up pretty much every year except this year

Reply 1662

chem@uni

Original post by ETRC

i was so pissed there was no brownian motion or circular motion
those come up pretty much every year except this year

I know I focused so much on them!!!!

Reply 1663

SH0405

Original post by chem@uni

that is what it was last year

True. Very true.

Reply 1664

ninjasinpjs

any prediction for the 80 ums?

Reply 1665

chem@uni

Original post by ninjasinpjs

any prediction for the 80 ums?

Honestly could be anything

Reply 1666

alyalyaly

lol wtf was that though.
Worse than last years Dx

Reply 1667

ninjasinpjs

Original post by chem@uni

Honestly could be anything

what was 80ums last year? I don't have Microsoft edexcel to download the converter ._.

Reply 1668

Cotcher

For the describing acceleration from the graph question, the acceleration is ALWAYS increasing, because even though the force was decreasing, it was still a positive force. This meant that the RATE OF INCREASE of acceleration was decreasing, but the acceleration was still increasing

Reply 1669

I Persia I

Unofficial mark scheme anywhere? So many graphs and virtually no definitions, expecting low boundaries.

Reply 1670

suprisefish

Original post by Flux_Dubstep

Yeah I got this, so s was proportional to u^2 with the other stuff as constant

Where did you get M from. That is wrong. Its a projectile with constant acceleration so distance is independent of the mass.

Reply 1671

I Persia I

Original post by MacDaddy101

thats pretty much what i did, did you get 7.14x10^6 or something like that?

I got something x10^6 i remember thinking it might be wrong coz the pressure ended up being lower than the initial because it was x10^7 but i realised the volume had increased due to the introduction of the new canister or whatever it was.

Reply 1672

ETRC

Original post by ninjasinpjs

any prediction for the 80 ums?

42 the paper was not that difficult for the later questions but people would make mistakes because OCR cannot word questions properly

Reply 1673

Elcor

Original post by Cotcher

F=ma so just think of the y axis as a

Therefore it's decreasing from 6.5ms onwards.

Posted from TSR Mobile

Reply 1674

suprisefish

Original post by ETRC

i was so pissed there was no brownian motion or circular motion
those come up pretty much every year except this year

Well maybe you should have learnt the theory behind everything and how to apply it rather than just memorising stuff from mark schemes. Personally I thought it was a great paper cos there were no **** questions where you just had to memorise stuff and it was all application of knowledge.

Reply 1675

I Persia I

Guys, for the system damped by the oil was it a sinusoidal graph with constantly decreasing amplitude until it hit 0 with the same wavelength as the original and was the graph asking for the 0-12hz oscillation a resonance graph with driving frequency and amplitude as the axes?