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

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If you got the wrong value for lambda in question 6 but did the next part correctly (with the wrong value of lambda ofc) how many marks would you lose?
Can someone please explain how you do q6 so frustrated lost all 13 marks on it
Original post by Student403
Highly doubt it given that most years it's just below 70


I recall one year it was 71. Did you think the paper was hard, easy or average? And compared to last year's which was 70 or 71.
Original post by zandneger
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


It was 800kg and sin theta=1/20 not 1/2.
Original post by target21859
I recall one year it was 71. Did you think the paper was hard, easy or average? And compared to last year's which was 70 or 71.


Last year's was 70

I thought it was alright
Original post by zandneger
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


The mass was 800kg and sintheta was 1/20
Original post by Student403
Last year's was 70

I thought it was alright


Yeah just hoping that error won't cost me the A*. I also left lambda as 30/7 and not to 3sf don't know if that'll cost me a mark though.
Original post by GreatBantz
If you got the wrong value for lambda in question 6 but did the next part correctly (with the wrong value of lambda ofc) how many marks would you lose?


75
Original post by target21859
Yeah just hoping that error won't cost me the A*. I also left lambda as 30/7 and not to 3sf don't know if that'll cost me a mark though.


Did it say you needed to put it to 3 sf?
Original post by Student403
Did it say you needed to put it to 3 sf?


You needed to use g right?
Original post by target21859
You needed to use g right?


Probably
Original post by Student403
Probably


So yeah you would need to give it to 2 or 3sr
Original post by target21859
So yeah you would need to give it to 2 or 3sr

It's a positive constant, not a measure of any dimension/unit
Ok so I've got 95 UMS in D2 from last year, and ~60 raw marks in both FP2 & M2.
Hoping an A* is still possible if I smash S2 ☺️ what do people think? x
Original post by Student403
The mass was 800kg and sintheta was 1/20


Wow we are so in sync
Original post by Lilylollydove7
Did anyone else get 1.22 as their distance for the centre of mass?


Yes, although unfortunately it’s wrong. I think you might have done the same thing as me and made a mistake working out the CoM of the triangle from the line AD.

I multiplied the height of the triangle ( 3√(2)/2 ) by ⅔ to end up with a seemingly nice √2. I should have multiplied it by ⅓.

Using that result, did you get 105º for the angle?
Original post by Johnny98
Wow we are so in sync


xD
Original post by paddy10663
Yes, although unfortunately it’s wrong. I think you might have done the same thing as me and made a mistake working out the CoM of the triangle from the line AD.

I multiplied the height of the triangle ( 3√(2)/2 ) by ⅔ to end up with a seemingly nice √2. I should have multiplied it by ⅓.

Using that result, did you get 105º for the angle?


Just saying I got root2 as being the triangle's CoM and ended up with the right answers are you sure you didn't go wrong somewhere else?

Edit ignore me didn't realise you meant from AD sorry
Original post by khaleesi98
Ok so I've got 95 UMS in D2 from last year, and ~60 raw marks in both FP2 & M2.
Hoping an A* is still possible if I smash S2 ☺️ what do people think? x


You need 3 A2 modules to average 90 (all those you have named count). D2 FP2 and M2 wouldn't get you an A* . You need to score quite high in S2 to get an A*
Original post by Student403
It's a positive constant, not a measure of any dimension/unit

Ah so 30/7 is right then? My friend told me I had to put it to 3sf.

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