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# EDEXCEL MATHS M1 14 JUNE 2017 - Unofficial Mark Scheme watch

• View Poll Results: How many marks do you think you got?
0-10
34
1.73%
11-20
22
1.12%
21-30
25
1.27%
31-40
65
3.31%
41-50
122
6.22%
51-60
314
16.01%
61-70
807
41.15%
71-75
572
29.17%

1. 1)p = 5/2
q=-3/2

2a) speed of p after collision: 2u
b) Direction HAS been reversed
c) impulse = 12mu

3) x = 2.3 (2sf)
Uniform plank = (i) Center of mass is at the center of plank (i.e. weight acts
directly at center of plank)
(ii) Mass is evenly distributed across the plank or plank is rigid and does not bend or buckle

4) mew = 0.47

5) thrust in rod = 6

6) acceleration of cyclist = 0.8
time when reached midpoint of AB = 2.8 seconds

7) bearing: 103
p = (position vector)+t(velocity)
q = same as above but with respective position and velocity vectors
show QP was the given vector
t = 0 of t= 0.32 when ships are 10km apart

8) motion of A: T - 2m(mew)g = 2ma
motion of B: mg-T=ma
b) show acceleration is g/3 (1-2(mew))
c) speed when b hits floor: sqrt(2g/3(1-2(mew))h)
d) d = 4/3h
e) if mew = 1/2, A would not slide along the table and the system would remain in rest

2. what did u get for u , was it 0.49
3. (Original post by eliteoppresser)
what did u get for u , was it 0.49
do you mean mew for the question with the inclined plane?

I got 0.43
4. 1) p= 5/2 and q=-3/2
2) 2u
b) direction reversed
c12um Ns
3) x=34/15 and 2.27
b) weight acts through centre
rod comment
4) 0.473
5) 6N
6) 0.8 ms-2
b) 2.81
7) 103
b) position vectors you know dat ****
c) proof duh
d) t=0 and t=0.32 hours
8) equations of motion
b) proof
c) root2/3)xgh(1-2mu)
d) 4/3h
e) no accel. Does not move

Professor Samraj Chahal, Professor Rohan Gulsin and lemuel crentsil, son of Godfrey
5. I got 0.87 or something for mew
6. Got 0.47 for mew?
7. I got 0.47 😕
8. Omg I failed 😔 But there's still c4 and c3 to do good in so its not all over!
9. mew = 0.473??
10. (Original post by ChloexCharlotte)
Got 0.47 for mew?
same here
11. (Original post by Amina.S16)
Omg I failed 😔 But there's still c4 and c3 to do good in so its not all over!
I feel like I messed up too. You'll be fine. Don't worry about it too much
12. on Q 3 what is the 2.27 for ?
13. I got 1/3d= h or the other way around :/
14. For part 8E I believe mew was 1/3 as it said that in the question? Correct me if I'm wrong..
15. (Original post by jo3ywils0n)
mew = 0.473??
I'm so sorry; I mixed up the 7 an 3 on the mark scheme

You're right, I got 0.47 as well. Sorry!
16. (Original post by Branztjsn)
For part 8E I believe mew was 1/3 as it said that in the question? Correct me if I'm wrong..
The question asked what would happen if mew = 1/2
17. (Original post by dididid)
on Q 3 what is the 2.27 for ?
x=2.27m for the moments question
18. Guess who is going to resist m1 next year 🙋🙋🙋
19. (Original post by ChloexCharlotte)
Got 0.47 for mew?
I'm so sorry; I mixed up the 7 an 3 on the mark scheme

You're right, I got 0.47 as well. Sorry!
20. (Original post by Lemuelc14)
x=2.27m for the moments question
I rounded to 2sf

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