Edexcel M3 15th May Post- Exam (UK Spec) Watch

supalape
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#1
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I know there’s not many people who did it (resits only) but if you did how did you find it?
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Hetshah
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#2
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That was the hardest paper I’d done, I didn’t even finish ffs
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supalape
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(Original post by Hetshah)
That was the hardest paper I’d done, I didn’t even finish ffs
Sorry to hear that :/ Here are some answers I got:


2. distance from surface of earth = 9R/11
3. speed when string slack = 4.2, distance when at rest 1.7m (if I vaguely remember)
5. COM = 2, 56 degrees for the angle and 1.89 for K (pretty sure I’m wrong about these)
6. V = (3gr/4)^1/2 for the vertical circle question
7. K = 1/3 for the last SHM question

If anyone got the same or has more answers please share!
Last edited by supalape; 5 days ago
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Hetshah
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I don’t even remember them but I did get at 1/3 for 7.
5) com I also got 2 but a different angle but I’m sure I’m wrong
2) I possibly got the same can’t even remember
1) I got 98/3 I think (allow me I think it’s wrong) 😂😭
6 I think I got the same answer.

(Original post by supalape)
Sorry to hear that :/ Here are some answers I got:


2. distance from surface of earth = 9R/11
3. speed when string slack = 4.2, distance when at rest 1.7m (if I vaguely remember)
5. COM = 2, 56 degrees for the angle and 1.89 for K (pretty sure I’m wrong about these)
6. V = (3gr/4)^1/2 for the vertical circle question
7. K = 1/3 for the last SHM question

If anyone got the same or has more answers please share!
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supalape
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(Original post by Hetshah)
I don’t even remember them but I did get at 1/3 for 7.
5) com I also got 2 but a different angle but I’m sure I’m wrong
2) I possibly got the same can’t even remember
1) I got 98/3 I think (allow me I think it’s wrong) 😂😭
6 I think I got the same answer.
At least we got some the same then lol. As long as the grade boundaries aren’t disgusting like FP2 last year, I think it’ll be fine
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ilazakristudent
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Where I differed to you:
1.H was 9/8, I wrote 9. I thought I aced this Exam ffs.
2.Earth distance 20R/11
3.same
4. What was this again ?
5.Angle is Defo 72 degrees, k I forgot
6. Same
7. It is 1/3, I wrote 1/6 forgot that the ball travels in the -0.4 -> 0.4 area twice. ffs
Last edited by ilazakristudent; 4 days ago
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supalape
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(Original post by ilazakristudent)
Where I differed to you:
1.This was another calculate k question i think
2.Earth distance 20R/11
3.same
4. What was this again ?
5.Angle is Defo 72 degrees, k I forgot
6. Same
7. It is 1/3, I wrote 1/6 forgot that the ball travels in the -0.4 -> 0.4 area twice.
For q2, I think you forgot to subtract the radius of the earth. The question asked for the distance from the surface not the centre, as i got 20/11 then subtracted R to get 9/11.

Q4 was the horizontal circular motion with a string and reaction force
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ilazakristudent
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First question H was 9/8, i dont know how i got 9, probably coz i didnt sleep at all the night of the exam

And question 4 asked you to prove that it was 2pi*root(3a/2g)
(Original post by supalape)
For q2, I think you forgot to subtract the radius of the earth. The question asked for the distance from the surface not the centre, as i got 20/11 then subtracted R to get 9/11.

Q4 was the horizontal circular motion with a string and reaction force
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ilazakristudent
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So thats -4 marks for Q1, -3 for Q7, -1 for Q2, -8 marks total 67/75, bye bye A* potentially even A
(Original post by ilazakristudent)
First question H was 9/8, i dont know how i got 9, probably coz i didnt sleep at all the night of the exam

And question 4 asked you to prove that it was 2pi*root(3a/2g)
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supalape
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(Original post by ilazakristudent)
First question H was 9/8, i dont know how i got 9, probably coz i didnt sleep at all the night of the exam

And question 4 asked you to prove that it was 2pi*root(3a/2g)
I definitely remember a 9/8 somewhere in the first question!

Yeah the proof on q4b was so reassuring for part a, was worried I was doing it wrong the whole time
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supalape
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(Original post by ilazakristudent)
So thats -4 marks for Q1, -3 for Q7, -1 for Q2, -8 marks total 67/75, bye bye A* potentially even A
Me too, potentially lost 7 marks because I screwed up Q5 b and c :/ really hoping that the grade boundaries will be generous (doubt it though)
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ilazakristudent
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Only thing I can do now to save my self is get full UMS on FP2 and M2
(Original post by supalape)
Me too, potentially lost 7 marks because I screwed up Q5 b and c :/ really hoping that the grade boundaries will be generous (doubt it though)
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TheBigBrick
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#13
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I got:
1- 9h/8
2- 9R/11
3- 4.2m/s and 1.7m
4-I got the “show that” part b so I assume it was all okay
5- I got x=2, the angle as 72, and then k=0.890?
6- I think the velocity at p was root(3gr) / 2
7- I must have messed up majorly because I didn’t get 1/3

What did people get for the earlier parts of Q7?
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supalape
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(Original post by TheBigBrick)
I got:
1- 9h/8
2- 9R/11
3- 4.2m/s and 1.7m
4-I got the “show that” part b so I assume it was all okay
5- I got x=2, the angle as 72, and then k=0.890?
6- I think the velocity at p was root(3gr) / 2
7- I must have messed up majorly because I didn’t get 1/3

What did people get for the earlier parts of Q7?
I cant remember much but I remember my value of W being (50)^1/2 and my amplitude being 0.8m
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TheBigBrick
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I got those values too, that’s a relief at least
I think I got 2.35 for AC and 1.65 for BC, do these seem familiar?
(Original post by supalape)
I cant remember much but I remember my value of W being (50)^1/2 and my amplitude being 0.8m
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supalape
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(Original post by TheBigBrick)
I got those values too, that’s a relief at least
I think I got 2.35 for AC and 1.65 for BC, do these seem familiar?
They deffo look familiar, I remember my extension in BC was 0.45
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ilazakristudent
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#17
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I got all same as you,

apart from Q1, but I got that one wrong stupid arithmetic mistake,Q2 i forgot to take away earth radius. How many marks was Q1 worth????
(Original post by TheBigBrick)
I got:
1- 9h/8
2- 9R/11
3- 4.2m/s and 1.7m
4-I got the “show that” part b so I assume it was all okay
5- I got x=2, the angle as 72, and then k=0.890?
6- I think the velocity at p was root(3gr) / 2
7- I must have messed up majorly because I didn’t get 1/3

What did people get for the earlier parts of Q7?
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supalape
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(Original post by ilazakristudent)
I got all same as you,

apart from Q1, but I got that one wrong stupid arithmetic mistake,Q2 i forgot to take away earth radius. How many marks was Q1 worth????
Q1 was 4 marks. What do we think about grade boundaries then? Honestly while it wasn’t too bad, I still think 2017 and 2018 were easier
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ilazakristudent
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What was k in this question again??? Not the value but its role in the dynamic.
(Original post by TheBigBrick)
I got:
1- 9h/8
2- 9R/11
3- 4.2m/s and 1.7m
4-I got the “show that” part b so I assume it was all okay
5- I got x=2, the angle as 72, and then k=0.890?
6- I think the velocity at p was root(3gr) / 2
7- I must have messed up majorly because I didn’t get 1/3

What did people get for the earlier parts of Q7?
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supalape
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#20
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#20
(Original post by ilazakristudent)
What was k in this question again??? Not the value but its role in the dynamic.
it was the multiple of the mass of the particle attached to the object when it was suspended
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