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I'm Batman...
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#1
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#1
Thought I should start off a thread just to see how everyone's revision is getting on, and to allow other people to share their knowledge and help each other out.

Please feel free to post your questions and queries if you wish...

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The H
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#2
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Mechanics isn't too bad, most of the past papers seem reasonable so hopefully the jan 2013 exam will go well
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abobop
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#3
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I'm struggling with projectiles any tips?

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The H
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#4
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(Original post by abobop)
I'm struggling with projectiles any tips?

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My teacher told me the only 2 equations you will need for projectiles are
s=ut+(at^2)/2
v=u+at
If that helps
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I'm Batman...
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(Original post by The H)
Mechanics isn't too bad, most of the past papers seem reasonable so hopefully the jan 2013 exam will go well
I've always found that all of the past papers basically follow the same lines with regards to the style/layout of questions, however whenever I go into my actual exam, completely new questions pop up. This is in all of my subjects... Do find that this is the case as well?
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The H
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(Original post by I'm Batman...)
I've always found that all of the past papers basically follow the same lines with regards to the style/layout of questions, however whenever I go into my actual exam, completely new questions pop up. This is in all of my subjects... Do find that this is the case as well?
Yeah, that's what AQA are like. Every time I have a maths or physics exam, they seem completely different to the previous ones. But it may be due to pressure of exam conditions
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I'm Batman...
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(Original post by The H)
Yeah, that's what AQA are like. Every time I have a maths or physics exam, they seem completely different to the previous ones. But it may be due to pressure of exam conditions
It could be down to pressure, but I always come out of my exams saying "What the hell was that?!"
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bugsuper
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#8
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I feel fairly confident. There's always one unusual question, but I also feel like we get an awful lot of time for this exam - does it take you guys 90 minutes to complete a past paper? I think having an extra 30 mins margin or so is really going to help.

Not looking forward to Mechanics and Core 3 on the same day, though. Three hour exam sesh that is 2/3rds of my Maths A-Level in a day
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The H
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(Original post by I'm Batman...)
It could be down to pressure, but I always come out of my exams saying "What the hell was that?!"
True, the jan 2012 core 1 and the june 2012 core 2 were really different to the others, seems likely they might do the same to core 3
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Cosmo.
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#10
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So how did everyone find it?
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ollyhal
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#11
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I found it generally okay however the river crossing question threw me a bit...
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danni.....:)
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#12
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Not too bad, although im not sure about question 6b where you had to find the resultant velocity of the boat. I found the answer to be 1.4, what did everyone else get?
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ollyhal
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#13
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I think I got around 3.2 :/ Most people were saying 5 but that would be too simple for 6 marks!
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danni.....:)
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#14
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What method did you use to get 3.2? To get 1.4 I used the cos formula (a squared=b squared + c squared -2bcCOSA) using a as 4, b as 3 and COS A as 180 - feta, and re-arranged to get c. It was a confusing question!! :confused:
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Boxed
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the answer for question 6b) had to be 1.4m/s as the boat wanted to achieve a resultant velocity in the direction as it did initially to get back (180degrees-53.1)
So you realize by drawing a triangle of velocities that the triangle is an isosceles and therefore can implement the cosine rule to find R. You eventually get a quadratic equation and when you solve youll find that R= 1.4 and -5

That means that R equalled 5 intially but on the way back it must be 1.4 to achieve the same direction
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Boxed
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#16
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remember it said SPEED was 4, NOT VELOCITY- so you cannot assume it will go 4m/s south on the way back.
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ollyhal
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#17
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Ah damn I used cosine but used 53.1
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bugsuper
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#18
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(Original post by Boxed)
the answer for question 6b) had to be 1.4m/s as the boat wanted to achieve a resultant velocity in the direction as it did initially to get back (180degrees-53.1)
So you realize by drawing a triangle of velocities that the triangle is an isosceles and therefore can implement the cosine rule to find R. You eventually get a quadratic equation and when you solve youll find that R= 1.4 and -5

That means that R equalled 5 intially but on the way back it must be 1.4 to achieve the same direction
This is what I got. I had a bit of confusion because I wasn't sure whether, when they said "The boat travels along the same line AB", they meant that this was the resultant velocity of the boat or that this was the way the boat was "pointed", so to speak.

Seemed to be a lot harder than most past papers! I was working right up until the end, which doesn't normally happen for M1
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Boxed
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#19
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they said they're making them more challenging so yeah. I didn't expect to use the cosine rule at all though! Strange
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J10
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#20
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what did everyone get for 7c (or whatever it was)
Asking about distance when north-west.
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