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Mega A Level Maths Thread MK II

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Reply 80

priyashah95

So scared for tomorrow :frown:

wanna cry

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Reply 81

31541

Original post by upthegunners

so far I have got:

when v=0 t=4/3 amd t=0

when t=0 d=3

when t=4/3 d=49/27

what other times do we take? thanks man

May as well go on and finish this here as I need to get back to revision!

Consider the graph of

v=3t^3-4t

. You know that the area underneath a velocity-time curve represents displacement. So, if we want to find total distance, we need to discard the sign of displacement and find the magnitude.

Find out when

v<0

, as this will help you determine what is a 'negative displacement'. I worked out that

v<0

when

t>\sqrt{\dfrac{4}{3}}

.

Now, you know the time at which he is back at his original position. Can you figure out how to find the distance he has travelled yet?

Reply 82

TH3-FL45H

Original post by priyashah95

So scared for tomorrow :frown:

wanna cry

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Me too

Reply 83

Kvothe the Arcane

Does anyone know why they've timetabled C1 and M1 for the same day/time? Surely many people are doing both. Seems to be such a logistical fail IMO!

Reply 84

Kvothe the Arcane

For harder mechanics do you need to use calculus? For example, integration to find areas under velocity-time graphs for displacement?

Reply 85

Felix Felicis

Original post by reubenkinara

Does anyone know why they've timetabled C1 and M1 for the same day/time? Surely many people are doing both. Seems to be such a logistical fail IMO!

If you think that's unfair, my brother has consistently had 2/3/4 exam clashes :L

Reply 86

Ursin

Yo, I wonder if anyone can answer this S1 question? I can't do it, my teachers can't do it, my friend who got 100 in S1 the first time we took it can't.
Eight cards are selected with replacement from a standard pack of 52 playing cards, with 12 picture cards, 20 odd cards and 20 even cards.
a) How many different sequences of 8 cards are possible?
For this I did 52^8, which is correct.
b) How many of the sequences in part a) will contain 3 picture cards, 3 odd-numbered cards and 2 even-numbered cards?
The answer in the back of the book says 3.097 x 10^12. I have tried a multitude of methods and cannot for the life of me obtain this answer.
Thanks :smile:

Reply 87

Kvothe the Arcane

Original post by Felix Felicis

If you think that's unfair, my brother has consistently had 2/3/4 exam clashes :L

I see. That's a shame. I myself have no clashes but many of my peers have lamented over clashes for maths modules.

Reply 88

Felix Felicis

Original post by reubenkinara

I see. That's a shame. I myself have no clashes but many of my peers have lamented over clashes for maths modules.

Tbf, he does do IB though.

Reply 89

justinawe

Original post by Felix Felicis

Tbf, he does do IB though.

My old school did IB, would have done it but they didn't offer Further Maths HL :sad:

Apparently they've got linear algebra and group theory and other cool stuff on IB Further Maths :sexface:

Reply 90

Felix Felicis

Original post by justinawe

My old school did IB, would have done it but they didn't offer Further Maths HL :sad:

Apparently they've got linear algebra and group theory and other cool stuff on IB Further Maths :sexface:

Further Maths SL* :wink:

Yeah he's doing that, independently though - he's shown me some cool stuff for the options topic: it's like a-level analysis, groups, number theory and then stats which looks like up to S3 ish :sexface:

Reply 91

justinawe

Original post by Felix Felicis

Further Maths SL* :wink:

It's HL starting from 2014 exam series I think, so would be SL for him, but HL if I'd done it.

Reply 92

ThePersian

Hello,

Could someone help me out here, I never understand proof questions.

If you know, can you also explain this whole idea behind '2n+1' and '2n' I don't understand it.

Thank you.

Reply 93

justinawe

Original post by ThePersian

Hello,

Could someone help me out here, I never understand proof questions.

If you know, can you also explain this whole idea behind '2n+1' and '2n' I don't understand it.

Thank you.

Seems like a fairly simple induction proof, what exactly are you having trouble with?

Reply 94

Ateo

Original post by Felix Felicis

If you think that's unfair, my brother has consistently had 2/3/4 exam clashes :L

What about the AEA/STEP I clash this year? That will be fun :biggrin:

Reply 95

username937760

Original post by reubenkinara

Does anyone know why they've timetabled C1 and M1 for the same day/time? Surely many people are doing both. Seems to be such a logistical fail IMO!

Original post by reubenkinara

For harder mechanics do you need to use calculus? For example, integration to find areas under velocity-time graphs for displacement?

Double quoted!

Firstly, Edexcel are notoriously bad at exam timetabling, for no conceivable reason other than to finish AS Level exams before A2 level exams. For example, I have the following clashes in my Maths exams this summer:

18th June - C4/M4
21st June - FP2/S4
24th June - FP3/M5

So many clashes could be avoided just by, for example, sitting M5 with M1 instead of with FP3, as M5 and FP3 are basically always sat together. But Edexcel never do this.

And you'll find calculus comes up in all modules past M1. M2 has basic differentiation and integration to solve kinematics problems. M3 contains more advanced differentiation and integration in kinematics, including acceleration as a function of displacement, integration to find work done and impulse, and integration to find centres of mass. M4 contains first and second order differential equations, along with calculus to find positions of stability. M5 contains first and second order vector differential equations, differential equations on varying mass (Where you have to derive the equations yourself using limits), integration to find moments of inertia and a bit of calculus in rotational motion.

Reply 96

Westeros

Hey, can someone help me with this question from M1 November 2003 Paper.
http://www.carlgauss.co.uk/PDFs/A-Level%20Papers/M1/M1%20-%202003%20November%20Paper.pdf
It's question 7f. I've done a-e, but I don't understand how to work out part f
Thanks :-)

Reply 97

Adam_Pritchard

I have my c2 tommorow. Wondering if i still get full marks in bionomial expansion if i multiply out using the box method and get correct answer. Can any one help. Please!

Reply 98

Felix Felicis

Original post by reubenkinara

For harder mechanics do you need to use calculus? For example, integration to find areas under velocity-time graphs for displacement?

Mechanics at its heart always utilises calculus. That's why Newton invented calculus! M1 has no right to call itself mechanics ;P

Reply 99

L'Evil Fish

Original post by Adam_Pritchard

I have my c2 tommorow. Wondering if i still get full marks in bionomial expansion if i multiply out using the box method and get correct answer. Can any one help. Please!