Edexcel AS/A2 Mathematics M2 - 17th June 2016 - Official Thread

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Would you get any marks for doing moments about B and finding R in terms of F? I got the right answer for F but didn't substitute it back into R afterwards.

Reply 541

CharpCharlie

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Question 7

Original post by Siddhart1998

58 for A

Dont get cheeky beta

Reply 543

DesignPredator

I have been cursed by question 1 in FP2 and now M2!

So annoying looked at a past paper mark scheme and said M0A0A0 for wrong limits.

Reply 544

MFMCSP

Original post by RuariJp

How many marks was the question when you had to find e and say is the collided again ?

the second last one was 3 marks then the colliding or not was 2 marks, think i lost them marks for stupid mistakes

Reply 545

zandneger

Original post by Siddhart1998

Is it 2.56 or 1.8????
Cuz it seems to be split.

2.56

Did the question again from memory.

Reply 546

zandneger

Original post by target21859

How many marks would you lose for finding R in terms of F? I got F right but I forgot to sub F into R. Was the question worth 6 marks?

Not sure how many you'd lose but you had to take moments about A to get P in terms of d,g and theta, which is what is asked for

Reply 547

shuu00

Original post by Tomgotthefunk

My answers are :
1. a) acceleration = 4
b) distance = 23/3 (but I was silly and integrated between 3 and 4 so this is wrong)
2. a) R= 80g
P= 500g
b) Distance = 53.1 m
3. c= 10/3
4. a) Distance of centre of mass = 0.830 m
b) Angle made = 114 degrees
5. a) Reaction= (5g/4)(1-d(cos^2(theta)))
Frictional force= (5g/4)d(sin(theta))(cos(theta))
b) d= 169/66
6. a) lambda = 30/7
b) velocity = sqrt(109) = 10.44
c) direction of travel: 73.3 degrees below the horizontal
7. a) velocity of A after collision = 21/10
velocity of B after collision = 3/20
b) e = 1/14
c) No collision (I put that B was moving slower than A but apparently they were moving at the same speed)
don't necessarily trust these though!!! I'm just some guy who did the exam, not qualified in any way!! feel free to correct/mock me :smile:

YASSSSSSSS

Thanks for this! Looks like I didn't do too bad despite finishing M2 last week hahaha :biggrin:

I also got the speed of A and B to be the same for 7c :smile:

(edited 7 years ago)

Reply 548

shuu00

Original post by zandneger

2.56

Did the question again from memory.

That's what I got too :smile:

Reply 549

shuu00

Does anyone know how many marks question 1 and question 6 were?

Reply 550

Maetras

Original post by zandneger

Not sure how many you'd lose but you had to take moments about A to get P in terms of d,g and theta, which is what is asked for

No you had to find R and F in terms of d,g and theta. They didn't ask you to take moments about A I'm pretty sure. I took moments about B correctly.

Reply 551

Seytonic

Original post by CharpCharlie

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Question 7

I got the same, can someone confirm this is correct?

Reply 552

Maetras

Did question 5 ask to take moments about A?

Reply 553

zandneger

Original post by Dex30

what actually was question 2 again cos i got 2P = 4900 nd therefore P as 2450?
3P=12.5R+12.5(800gsintheta)
- P=12.5R

The mass of the cyclist was 80kg not 800kg

This is it, however the second equation was P = 12.5R - 12.5(80gsintheta) because the cyclist was moving down the hill.

So you get

3P = 12.5R + 12.5(40g)
P = 12.5R - 12.5(40g)
2P = 25(40g) = 1000g
P = 500g = 4900N

Same

Original post by somevirtualguy

Can't believe I messed up 1b!!!

How many marks would I get for correctly integrating v to find x in terms of t, and working out x when t=3

No trolls plz

Edit: Also how many marks lost for saying d=169/66 (rounds to 2.56) rather than giving to 3sf?

Bump

Reply 556

Pyslocke

Anyone think this enough for an A*? M2: 75/75. M3: 68/75. FP2: 66/75?

Reply 557

somevirtualguy

Original post by Pyslocke

Anyone think this enough for an A*? M2: 75/75. M3: 68/75. FP2: 66/75?

I'd say yes, FP2 likely to be around 67/68 for an A*, M3 probably about 69/70 because a lot found it easy, so that 100UMS should give you a decent shout

Reply 558

johnthedog

Original post by RThornton

My answers:
1).
a). q=-8, p=2, r=11
b). 11/3m

2).
P=4900w
R=784N
b). d=53.1m

3).
c=10/3

4).
x=0.83m below
angle= 114 degrees

5).
d= 2.56m

6). lambda= 30/7 (4.29)
speed= 10.4m
angle= 73.6 degrees to the vector i (horizontal)

7). A= 3u/20 (left)
B= 21u/10 (right)
e=1/14
no collision as B after wall moves at the same speed as A, hence never meet