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Edexcel M3 - May 13th, 2015 [Exam discussion thread]

A thread for the M3 exam this year.

Useful links:
Revision notes http://www.mrbartonmaths.com/resources/a%20level%20revision/M3.pdf
Derivative calculator http://www.derivative-calculator.net/#
Integral calculator http://www.integral-calculator.com/#
Online graphing calculator https://www.desmos.com/calculator

Formulae you need to be able to recall in the spoiler below

Spoiler

(edited 8 years ago)

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Nice!
Exam is earlier then last year!
Reply 2
Avatar for Elcor
Elcor
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Original post by Ilovemaths96
Nice!
Exam is earlier then last year!


When was it last year? It feels ridiculously early this year. Don't know what the general trend is though.
Original post by Elcor
When was it last year? It feels ridiculously early this year. Don't know what the general trend is though.


I know right! Last year 18 May
Reply 4
Avatar for imyimy
imyimy
3
its so early omg, I'm starting earlier than some people who are resitting AS exams because of M3! also i wish there were more revision resources available, like exam solutions doesn't cover it which I'm scared about.
Reply 5
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Elcor
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Original post by imyimy
its so early omg, I'm starting earlier than some people who are resitting AS exams because of M3! also i wish there were more revision resources available, like exam solutions doesn't cover it which I'm scared about.


ExamSolutions has posted one video so far, and I suspect a few more will appear before the exam, but he won't have completed the spec by then. Here it is: http://www.examsolutions.net/maths-revision/mechanics/circular-motion/vertical-circle/slack-string/tutorial-1.php

How far are you through the spec? I'm just moving on to the law of gravitation in the dynamics section.
The non-uniform circular motion is the part I'm the most unfamiliar with. Otherwise I'm ok with the rest.
Original post by Elcor
ExamSolutions has posted one video so far, and I suspect a few more will appear before the exam, but he won't have completed the spec by then. Here it is: http://www.examsolutions.net/maths-revision/mechanics/circular-motion/vertical-circle/slack-string/tutorial-1.php

How far are you through the spec? I'm just moving on to the law of gravitation in the dynamics section.


which textbooks are you guys using? I'm using the new pearson and the old heinemann books (both orange)
Reply 8
Avatar for imyimy
imyimy
3
Original post by Elcor
ExamSolutions has posted one video so far, and I suspect a few more will appear before the exam, but he won't have completed the spec by then. Here it is: http://www.examsolutions.net/maths-revision/mechanics/circular-motion/vertical-circle/slack-string/tutorial-1.php

How far are you through the spec? I'm just moving on to the law of gravitation in the dynamics section.


We just finished the exercise on the law of gravitation too! I feel better knowing you're at the same position. I keep panicking we don't have enough time. And yeah I saw that exam solution post this morning, it's a shame it won't be finished until "late 2015" though. Hopefully we'll have more videos soon to help us though.


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Reply 9
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Elcor
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Original post by Ilovemaths96
which textbooks are you guys using? I'm using the new pearson and the old heinemann books (both orange)


Old Heinemann one.

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Reply 10
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Elcor
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My teacher and I found a question from the old Heinemann book (Ex. 4F, Q4) which we couldn't get the answer in the book for. We think it's wrong, but I'd like to see if others get what we got:

A particle P of mass 0.5kg is hanging in equilibrium from one end of a light inelastic string of length 1.5m whose other end is at a fixed point O. P is projected horizontally with speed u. When OP is horizontal it meets a small smooth peg at Q, where OQ = 1m. Calculate the minimum value of u if P is to describe a complete circle about Q.
Original post by Elcor
My teacher and I found a question from the old Heinemann book (Ex. 4F, Q4) which we couldn't get the answer in the book for. We think it's wrong, but I'd like to see if others get what we got:

A particle P of mass 0.5kg is hanging in equilibrium from one end of a light inelastic string of length 1.5m whose other end is at a fixed point O. P is projected horizontally with speed u. When OP is horizontal it meets a small smooth peg at Q, where OQ = 1m. Calculate the minimum value of u if P is to describe a complete circle about Q.


I agree with the book (once I finally found it). Remember that, because you have a string, you need the tension at the top to be greater than or equal to 0 to do complete circles. It's not about the speed at the top being greater than or euqal to 0.
Reply 12
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Elcor
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Original post by tiny hobbit
I agree with the book (once I finally found it). Remember that, because you have a string, you need the tension at the top to be greater than or equal to 0 to do complete circles. It's not about the speed at the top being greater than or euqal to 0.


Thanks, I got it now. That's exactly where we went wrong in the first attempt.
M3 bare early this year.
Duno bout you guys but i learnt most of M4 before M3 i find half of M3 so boring. Its like all just 'energy energy bull'hit enrgy work done KE PE'.


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Reply 14
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Elcor
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Original post by physicsmaths
M3 bare early this year.
Duno bout you guys but i learnt most of M4 before M3 i find half of M3 so boring. Its like all just 'energy energy bull'hit enrgy work done KE PE'.

What's M4 like? Any new mathematics used?

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Reply 15
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Elcor
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Original post by physicsmaths
M3 bare early this year.
Duno bout you guys but i learnt most of M4 before M3 i find half of M3 so boring. Its like all just 'energy energy bull'hit enrgy work done KE PE'.


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What's M4 like? Any new mathematics from core required?

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Original post by Elcor
What's M4 like? Any new mathematics from core required?

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Mainly trigonometry in oblique collisions, but otherwise the concepts are new, such as relative motions.


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Original post by Elcor
What's M4 like? Any new mathematics from core required?

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Assuming we're still talking Edexcel, M4 requires the first and second order differential equations from FP2.
Original post by tiny hobbit
Assuming we're still talking Edexcel, M4 requires the first and second order differential equations from FP2.


Yh the whole of ch 3 M4 is just integration pretty much


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Original post by physicsmaths
Yh the whole of ch 3 M4 is just integration pretty much


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And it's pretty easy too, just draw a suitable diagram and that's about it.


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