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# Edexcel AS/A2 Mathematics M1 - 8th June 2016 - Official Thread watch

1. Sometimes get questions with an extra variable....you answer in terms of that variable but it doesnt say 'answer in terms of h'...anyone know how to identify these?

I sometimes end up frantically trying to find a second equation only to find the answer was in terms of the other variable!
2. IAL M1 THREAD FOR DISCUSSION http://www.thestudentroom.co.uk/show....php?t=4149785
3. These are all the questions and parts I remember and how I did them. Please let me know If I made any errors and please add to this list because I dont remember some of the questions!

Question 1
Not sure what it was exactly but I remember finding it easy overall

Question 2
Related to the momentum of to masses before and after collision. We had to find the impulse and the mass of one of the two moving objects. I totally skipped this one.

Question 3
The two bricks falling.
So we knew that A weighed 9kg and that B weighed 1.5 kg.
A started from rest so initial velocity was 0 and its final velocity was 7m/s. The acceleration was 9.8 and using these three values we could calculate the fallen height required in the first part.
In the second part I modeled A and B together as one particle of mass 10.5 kg. This gave a downward force of 10.5g. I also used the fact that the two bricks finally came to rest so the final velocity was 0m/s and I made the assumption that there was no resistive force such that all off brick A's downward velocity as transferred to Brick B meaning that the initial velocity was 7m/s. We also knew that the bricks travelled a distance of 12cm or 0.12m. using this data i applied the formula v^2=u^2 +2as to calculate the upward acceleration or the deceleration applied to the bricks as a whole. Then using this acceleration I found the upward resistive force applied by the ground on the bricks by resolving the system in an upward direction.

Question 4
This one was about Vectors. seemed Easy but I hadn't studied this ;-;

Question 5
Diver and Springboard.
For part (a) (i) I did:
50 x 4 - 30 x 2
For Part (a)(ii) I did
50 x 3.4 - 30 x 1.4

For part (b) I used
4x - 30x2 = 5000N (I now realise I shoul have subtracted The normal reaction at C from this as well)

Question 6
The two Cars A and B.
I found T=7
So I started by using the fact that Car A had travelled (1/2 x 3,5 x 14)m in the first 3.5 seconds and then 14m each second thereafter. I then drew up a table of values of distance that A had traveled for each second after that point. I also used the formula s=ut +1/2at^2 to find an equation of motion for B becasue we knew it started from rest and had a constant acceleration of 3m/s^2. The formula simplified to s=1.5t^2. Using this answer I then calculated the distances B travelled for different values of time. At T=7 both A and B had travelled 73.5 m and so that was the point that B passed A.
I found the distance travelled by B to be= 73.5m
Drawing the graphs for this question was pretty easy.

Question 7
The two particles over a pulley and a string.
We knew that the mass of the particle on the left was 4kg and that the system was in static equilibrium.
Using this knowledge I first found the normal reaction of the particle on the left by resolving perpendicular to the slope and using R - 4gcos(a) = 0
Then using my answer I found the F(max) by using the coefficient of friction they had provided us.
From there I resolved in the direction of the tension to find the value of the tension for the particle on the left side.
I then argued that since the particle is in static equilibrium that the tension on both sides of the pulley would be the same.
Then by resolving in the direction of the tension for the particle on the right I was able to find the mass of the particle on the right which I found to be
m= 2KG!

I did the other parts too but I want to know what you guys got for it

Well thats all I remember.
4. What was the reaction force at C ? And yeah I got T=7
5. (Original post by Elaria)
what was T ?
15.68
6. (Original post by SpoodleDoodle)
These are all the questions and parts I remember and how I did them. Please let me know If I made any errors and please add to this list because I dont remember some of the questions!

Question 1
Not sure what it was exactly but I remember finding it easy overall

Question 2
Related to the momentum of to masses before and after collision. We had to find the impulse and the mass of one of the two moving objects. I totally skipped this one.

Question 3
The two bricks falling.
So we knew that A weighed 9kg and that B weighed 1.5 kg.
A started from rest so initial velocity was 0 and its final velocity was 7m/s. The acceleration was 9.8 and using these three values we could calculate the fallen height required in the first part.
In the second part I modeled A and B together as one particle of mass 10.5 kg. This gave a downward force of 10.5g. I also used the fact that the two bricks finally came to rest so the final velocity was 0m/s and I made the assumption that there was no resistive force such that all off brick A's downward velocity as transferred to Brick B meaning that the initial velocity was 7m/s. We also knew that the bricks travelled a distance of 12cm or 0.12m. using this data i applied the formula v^2=u^2 +2as to calculate the upward acceleration or the deceleration applied to the bricks as a whole. Then using this acceleration I found the upward resistive force applied by the ground on the bricks by resolving the system in an upward direction.

Question 4
This one was about Vectors. seemed Easy but I hadn't studied this ;-;

Question 5
Diver and Springboard.
For part (a) (i) I did:
50 x 4 - 30 x 2
For Part (a)(ii) I did
50 x 3.4 - 30 x 1.4

For part (b) I used
4x - 30x2 = 5000N (I now realise I shoul have subtracted The normal reaction at C from this as well)

Question 6
The two Cars A and B.
I found T=7
So I started by using the fact that Car A had travelled (1/2 x 3,5 x 14)m in the first 3.5 seconds and then 14m each second thereafter. I then drew up a table of values of distance that A had traveled for each second after that point. I also used the formula s=ut +1/2at^2 to find an equation of motion for B becasue we knew it started from rest and had a constant acceleration of 3m/s^2. The formula simplified to s=1.5t^2. Using this answer I then calculated the distances B travelled for different values of time. At T=7 both A and B had travelled 73.5 m and so that was the point that B passed A.
I found the distance travelled by B to be= 73.5m
Drawing the graphs for this question was pretty easy.

Question 7
The two particles over a pulley and a string.
We knew that the mass of the particle on the left was 4kg and that the system was in static equilibrium.
Using this knowledge I first found the normal reaction of the particle on the left by resolving perpendicular to the slope and using R - 4gcos(a) = 0
Then using my answer I found the F(max) by using the coefficient of friction they had provided us.
From there I resolved in the direction of the tension to find the value of the tension for the particle on the left side.
I then argued that since the particle is in static equilibrium that the tension on both sides of the pulley would be the same.
Then by resolving in the direction of the tension for the particle on the right I was able to find the mass of the particle on the right which I found to be
m= 2KG!

I did the other parts too but I want to know what you guys got for it

Well thats all I remember.
(Original post by Steph.shakes)
What was the reaction force at C ? And yeah I got T=7
(Original post by saitama kun)
15.68
Guys this is the GCE M1 Thread, the IAL M1 Thread is at http://www.thestudentroom.co.uk/show....php?t=4149785
7. (Original post by wenogk)
Guys this is the GCE M1 Thread, the IAL M1 Thread is at http://www.thestudentroom.co.uk/show....php?t=4149785
We have hijacked it now sorry

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8. (Original post by wenogk)
Guys this is the GCE M1 Thread, the IAL M1 Thread is at http://www.thestudentroom.co.uk/show....php?t=4149785
Thanks, lets get rollin' to the discussions shall we?
9. There goes my maths A level

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10. (Original post by Thomith)
There goes my maths A level

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11. What did everyone get for d and M? For the moments question

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12. (Original post by amelienine)
What did everyone get for d and M? For the moments question

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I got d=1.2 m and M = 42 kg
13. That impulse question 😡
14. Here's what I remember:

Question 1: Getting speed = 13m/s for the last part
Question 2: that whole triangle thing idek what that was but i found R using F = ma
Question 3: Impulse?? I got 3 Ns
Question 4: Coefficient of friction was 0.7 something
Last Question: Force on the pulley was 2Tcos(45)
Don't remember anymore questions, maybe some of the answers if anyone asks
15. Posted from TSR Mobile
I got rekt by the resultant force question. 7 marks gone
16. this is how I found F2
17. Anyone agree or disagree with these answers?
Vectors
1a) 104 degrees
C) 640i+640j

Pan on cable
2a) 20.6N
B) 15.5N

Particle into a wall
3) 1.4Ns

Speed-time graph
8.75s

Moments
M=42
D=1.2

Slope question
Coefficient = 0.73

Vectors (again)
F2= 2.5i+2.5j
Speed=13

Connected Particles
T=11.76
Resultant force = 16.6 bearing 45 degrees

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18. What did everyone get for the force F2 on the vector question?
19. (Original post by theviki)
I got d=1.2 m and M = 42 kg
I got 0.8 and 48... :/

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20. (Original post by Mia66)
What did everyone get for the force F2 on the vector question?
I got root5 over 2, how the hell were you supposed to do that question?? 😂

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