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# STEP Prep Thread 2016 (Mark. II)

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1. (Original post by Geraer100)
Just to make sure, when drawing a graph, are there some features that must be find like asymptotes, stationary points, points that cross x, y axis , symmetry or it really depends on the question? And sketch and draw I guess they are the same no? Sorry if the question is a bit silly.
I think you should always justify the features of your sketch unless it's obvious that the question wants very little detail or it's very hard to determine the features and you can't see the question asking that. So for the most part, always justify and sketch/label features like asymptotes/stationary values/intercept-values.

(Original post by Themathgeek)
Sorry I just realised how unclear that was

How do you know that the horizontal velocity is 0 when T= Ucostheta/(kg) ?

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Can you see that ? (that stems from integrating and plugging in the relevant boundary conditions), if so - set
2. (Original post by IrrationalRoot)
The main reasons I need to do rough work on a separate sheet are that
1. I need my work to be as neat as possible to be able to follow what I'm doing well and make less silly mistakes (because that is a massive problem I have).
2. I need to trial different methods quite a lot, which would not work nearly as well if I had to put these in my solution since I'd be using loads of paper and most of my work would be messy scribbling (so basically 1.)

I wouldn't mind doing all rough work in the booklet too much but it would have to be on a separate page and I'm not sure it would earn any marks there.
Hmm, yeah, I do suppose in that case since it helps you focus on your work more, that it might be best to do some working on rough paper. Your centre will definitely provide that for you.
3. Do we have the time before the II exam to improve in geometry and vector questions significantly? It seems like flooding the pure with those types of questions would be an easy miss of an offer for me, unless there are also good mech questions.

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4. (Original post by Insight314)
Do we have the time before the II exam to improve in geometry and vector questions significantly? It seems like flooding the pure with those types of questions would be an easy miss of an offer for me, unless there are also good mech questions.

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Not much time, can if you like but the good news is that if lots of vectors/geometry comes up they know people like those questions less and grade boundaries would be accordingly low.

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5. (Original post by IrrationalRoot)
Yeah I usually write ", which is true, so result follows."
What if you can't use <=> and the left statements are less general .
That's when I use <= .
Actually I want to ask is it wrong to claim P=>Q when P,Q are equivalent ?
It's kind of tricky because P implies Q so it's true but these symbols refer to what P and Q are to each other and since they are equivalent P=>Q is wrong . Idk if that makes sense, just answer.
6. [QUOTE=Zacken;65717025]I think you should always justify the features of your sketch unless it's obvious that the question wants very little detail or it's very hard to determine the features and you can't see the question asking that. So for the most part, always justify and sketch/label features like asymptotes/stationary values/intercept-values.
/QUOTE]

Okay, thanks for that. And my plan for the STEP is to spend 5/10 minutes looking and deciding the order of the questions that I am going to do. So I will start with the easy ones and then when I get stuck, I will spend 5/10 minutes to try to solve the problem but if I cannot really solve it, then I will move on. And if there is not a lot of time left at the end and I still haven't attempted 6 questions. I wonder if it's better to start new question and gain the first few easy marks or go back to try to complete more full solutions. (This is problem that I usually encountered when doing mocks, I took too much time thinking which choice is better).

Do you think the plan is fine?
7. Btw last year I asked for rough paper and they didn't give me , they said it is not permitted .
Not the first time British council is wrong .
8. (Original post by jjsnyder)
Not much time, can if you like but the good news is that if lots of vectors/geometry comes up they know people like those questions less and grade boundaries would be accordingly low.

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Do you think I should just practice mech questions then? In case pure is infested with geometry/vectors I would then be a bit more confident with mech. I feel like it is currently much more important to have confidence in doing a particular type of STEP question than to try to improve problem-solving abilities for the few days we have left. And I also think doing mech questions would make me a bit more confident with them, since I am already pretty good with mech, but if I start doing geometry/vectors now when I haven't done any for the half-year I've been doing STEP, then it would be more difficult to gain confidence in attempting them.

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9. (Original post by Insight314)
Do you think I should just practice mech questions then? In case pure is infested with geometry/vectors I would then be a bit more confident with mech. I feel like it is currently much more important to have confidence in doing a particular type of STEP question than to try to improve problem-solving abilities for the few days we have left. And I also think doing mech questions would make me a bit more confident with them, since I am already pretty good with mech, but if I start doing geometry/vectors now when I haven't done any for the half-year I've been doing STEP, then it would be more difficult to gain confidence in attempting them.

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Join the dark side and do stats! I'd probably do mech if you literally haven't done any vectors questions, but OTOH once you do two or three vectors questions you've got a good chance of getting 1/2 marks on any vectors question that comes up, since they pretty much all start "A and B have position vectors a and b, and are not co-linear with O. P lies on the line AB, and the ratio of the length of AP to PB is (1 -λ):λ".
10. (Original post by Geraer100)
Do you think the plan is fine?
The main thing is whether or not it works for you, if it does, then yes.

(Original post by Vesniep)
What if you can't use <=> and the left statements are less general .
That's when I use <= .
Actually I want to ask is it wrong to claim P=>Q when P,Q are equivalent ?
It's kind of tricky because P implies Q so it's true but these symbols refer to what P and Q are to each other and since they are equivalent P=>Q is wrong . Idk if that makes sense, just answer.
It's not wrong. If two things are equivalent, then they imply each other.

So P => Q is a true statement.
11. (Original post by sweeneyrod)
Join the dark side and do stats! I'd probably do mech if you literally haven't done any vectors questions, but OTOH once you do two or three vectors questions you've got a good chance of getting 1/2 marks on any vectors question that comes up, since they pretty much all start "A and B have position vectors a and b, and are not co-linear with O. P lies on the line AB, and the ratio of the length of AP to PB is (1 -λ):λ".
All right, thanks!

I might take a look at vector questions but I prefer to just fully immerse myself with mechanics, since I find those questions very interesting.

Oh, and I wouldn't even be able to join the dark side (stats) since I haven't done any statistic modules, haha. I did M1-M5 which is why I am saying I should immerse myself with mechanics.

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12. (Original post by jjsnyder)
Only reason I can think of that I would ask for spare unmarked paper is when I am proving a condition one way, but I want to start in reverse, so I do the reverse calculations on a rough sheet then put them the right way on the actual answer booklet (and that way the examiner doesn't think bad of you). Can we do this in the exam?

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Write it out then just colour it black tbh.
You will have more then enough space most likely.

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13. (Original post by Vesniep)
What if you can't use <=> and the left statements are less general .
That's when I use <= .
Actually I want to ask is it wrong to claim P=>Q when P,Q are equivalent ?
It's kind of tricky because P implies Q so it's true but these symbols refer to what P and Q are to each other and since they are equivalent P=>Q is wrong . Idk if that makes sense, just answer.
The half truth is still truth, even if it is not the whole truth..
Just because P => Q does not describe the full relationship between P and Q, i.e. it ignores the fact that Q => P, does not mean it is in and of itself wrong to write
14. (Original post by Zacken)
The main thing is whether or not it works for you, if it does, then yes.
Yeah, I guess I will stick with this plan
15. (Original post by Insight314)
Do you think I should just practice mech questions then? In case pure is infested with geometry/vectors I would then be a bit more confident with mech. I feel like it is currently much more important to have confidence in doing a particular type of STEP question than to try to improve problem-solving abilities for the few days we have left. And I also think doing mech questions would make me a bit more confident with them, since I am already pretty good with mech, but if I start doing geometry/vectors now when I haven't done any for the half-year I've been doing STEP, then it would be more difficult to gain confidence in attempting them.

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Physics maths, top tips for vectors:
1: obviously knowing equations of lines.
2: if asked to prove PQR are collinear which comes up nearly every year prove p-q=t(q-r) hence parallel line segments proving they are collinear.
3: p.p=|p|^2 does wonders.
4: reflections, drop a perpendicular and do dot products.
That is pretty much it and sometimes similar triangles.
It won't take that long to sort this stuff out! Go for it id say. Trust me it doesn't get harder then that you will get atleast partials.

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16. (Original post by physicsmaths)
Physics maths, top tips for vectors:
1: obviously knowing equations of lines.
2: if asked to prove PQR are collinear which comes up nearly every year prove p-q=t(q-r) hence parallel line segments proving they are collinear.
3: p.p=|p|^2 does wonders.
4: reflections, drop a perpendicular and do dot products.
That is pretty much it and sometimes similar triangles.
It won't take that long to sort this stuff out! Go for it id say. Trust me it doesn't get harder then that you will get atleast partials.

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17. (Original post by Geraer100)
Reflections of C to C' in line L so we draw perpendicular to line L which is collinear with points C and C'(trivially since the angles add to 180/parallel) then we know these two vectors are identical.
See II 2011'for this in practice .

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18. (Original post by physicsmaths)
Physics maths, top tips for vectors:
1: obviously knowing equations of lines.
2: if asked to prove PQR are collinear which comes up nearly every year prove p-q=t(q-r) hence parallel line segments proving they are collinear.
3: p.p=|p|^2 does wonders.
4: reflections, drop a perpendicular and do dot products.
That is pretty much it and sometimes similar triangles.
It won't take that long to sort this stuff out! Go for it id say. Trust me it doesn't get harder then that you will get atleast partials.

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I see, okay definitely trying out vector questions then. Gonna screenshot those tips, do you have any for geometry? With my practice, should I do STEP I vectors or STEP II vectors? I don't have the time so I feel like it is best to do a few STEP II vector questions since they are more difficult.

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19. (Original post by physicsmaths)
Reflections of C to C' in line L so we draw perpendicular to line L which is collinear with points C and C'(trivially since the angles add to 180/parallel) then we know these two vectors are identical.
See II 2011'for this in practice .

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Okay really thanks for your explanation Yeah I will have a look at that question tomorrow!Good night
20. (Original post by Insight314)
I see, okay definitely trying out vector questions then. Gonna screenshot those tips, do you have any for geometry? With my practice, should I do STEP I vectors or STEP II vectors? I don't have the time so I feel like it is best to do a few STEP II vector questions since they are more difficult.

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Geometry is just diagrams and gcse circle theorems which I'm sure you are familiar with. You can easily get 5-6 problems in before the exam which is enough to get the ideas of vectors. You might not get a full but around. 15 marks are just comparing coefficients in equations which is very straight forward!

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