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AQA AS Further Maths Paper 1 Pure 2019 (13th May) unofficial markscheme

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You then have to multiply by two as when rotating through 2pi radians you multiply by pi, V= pi x integral hence V= angle/2 x integral, so it’s 40/9

Original post by RVSZN

The equation was y=2x^1/2 + x^-2/3, when you apply this to the volumes of revolution equation with the limits x=1/8 and x=8 you get something like 103.725, which then to find theta you do (461/2)/103.725 and you get 20/9

Reply 41

AI3xander

What did people get for the distance on the mountain vectors question?

Reply 42

MattyHAMB

Yeah I got 4.4 radians but put it in degrees first lmao

Reply 43

max532

Original post by eclipseboi

5 marker. It was the first "proper" question, I think. Asked you to find the volume of revolution for the region bounded by the hyperbola, y-axis, x-axis and the line y=a.

yeah that was a show question that the volume was ma^3 where m was 3.40 (3.s.f) m=13/12(pi) not sure how people were getting 2.2 radians

Reply 44

username3634800

Original post by max532

yeah that was a show question that the volume was ma^3 where m was 3.40 (3.s.f) m=13/12(pi) not sure how people were getting 2.2 radians

I had literally no idea how to do it, so I don't know what the correct answer was :frown:

Reply 45

lemmens

Original post by HateMarkSchemes

Or p < -2, because you could move it either down or up.

but if you moved it down, the graph would still cut through the x-axis and thus give real roots

Reply 46

max532

Original post by eclipseboi

I had literally no idea how to do it, so I don't know what the correct answer was :frown:

They're talking about an Edexcel question, can't remember the question entirely but majority of people at my college were getting 13/12 (pi) so I'm hoping that's the right answer

Reply 47

max532

Original post by lemmens

but if you moved it down, the graph would still cut through the x-axis and thus give real roots

I had 1 real root, which was gamma... You'd still get a crossing it it was moved up which is okay. So pretty sure it was p>2 p<-2

Reply 48

username3634800

Original post by max532

They're talking about an Edexcel question, can't remember the question entirely but majority of people at my college were getting 13/12 (pi) so I'm hoping that's the right answer

Oh right, I was referring to the AQA volumes of revolution question where you had to give your answer as ma^3.

Reply 49

lemmens

Original post by max532

I had 1 real root, which was gamma... You'd still get a crossing it it was moved up which is okay. So pretty sure it was p>2 p<-2

ah yes I see what you mean now!!

Reply 50

username3193618

Don’t use pi use theta once you’ve completed your integration divide by the integrand and you’ll get theta= 20/9 which is 2.2

Original post by eclipseboi

I had literally no idea how to do it, so I don't know what the correct answer was :frown:

Reply 51

meinkemf

The answer is 13/12Pi

Reply 52

username3193618

The question where people are getting 2.2 radians is an equation bounded between x=8 and x=1/8

Original post by max532

yeah that was a show question that the volume was ma^3 where m was 3.40 (3.s.f) m=13/12(pi) not sure how people were getting 2.2 radians

Reply 53

#DD4life

Holy **** I got that as well!!!!

Reply 54

lemmens

how did you all find paper 2, and which topics did you study??

Reply 55

meinkemf

Did stats and mechanicz, went much better than paper 1. Anyone else remember their answers, I got 1 17m/s^2 for the a celebration of the truck and 4020j lost for the slide

Original post by lemmens

how did you all find paper 2, and which topics did you study??

Reply 56

alicestudies

did you mean 1.17? If so I got the same!! And I think I got around that for the energy lost too - if I'm honest, the paper has been erased from my mind though, not a mechanics fan at all! 🤣

Original post by meinkemf

Did stats and mechanicz, went much better than paper 1. Anyone else remember their answers, I got 1 17m/s^2 for the a celebration of the truck and 4020j lost for the slide

Reply 57

meinkemf

Yeah I meant 1.17, mechanics was the topic that stopped me from ending it all

Original post by alicestudies

did you mean 1.17? If so I got the same!! And I think I got around that for the energy lost too - if I'm honest, the paper has been erased from my mind though, not a mechanics fan at all! 🤣

Reply 58

benster789

Original post by asifmahmoud

How did everyone find it? It was hard to finish everything in time. Can we start an unofficial markscheme for today's paper? Thank you!!

AIDS

Reply 59

Sabav

My exam board is actually ocr but since everyone found the aqa paper hard I really wannahave a go at the paper, as anyone got a link? It would be greatly appreciated