M1: Is this question impossible, or is it just me?

mikesgt2

Question 5 from the Edexcel M1 specimin paper:

A truck of mass 3 tonnes moves on straight horizontal rails. It collides with truck B of mass 1 tonne, which is moving on the same rails. Immediately before the collision, the speed of A is 3 m/s and the trucks are moving towards each other. In the collision, the trucks couple to form a single body C, which continues to move on the rails.

(a) Find the speed and direction of C after the collision.

There are other parts to the question, but it seems to me that this question is impossible. The mark scheme seems to assume that the speed of B is 4 m/s, is there any way you can know this from the wording of the question?

on http://www.ajimal.com/download/alevel/specimanmechpage2.htm they used 4m/s for the speed of truck B

Reply 4

kikzen

14

tammypotato

on http://www.ajimal.com/download/alevel/specimanmechpage2.htm they used 4m/s for the speed of truck B

yeah but if you look at the paper it doesnt say that...

Reply 5

kikzen

yeah but if you look at the paper it doesnt say that...

i know lol i tried it n gt stuck for 2hrs on it lol

Reply 6

ThugzMansion7

9

the paper is correct.....the spec paper ive got DOES SAY B TRAVELS AT A speed of 4ms-1

go to mrhughes.net, edexcel may have altered the paper or summin cos i got the answer...no probs

Reply 7

holy macro, shit, how the hell did they screw that up?? MAN!! i dunno what to say, ive been trying the question since ever!!! :mad:

Reply 8

Pixelfairy #1

KOH

holy macro, shit, how the hell did they screw that up??

They're EdExcel. Need I say more? :rolleyes:

Reply 9

No you dont ma firend! i was woundering, if they screwed up in a question like that in an exam? what would happen?

Reply 10

Pixelfairy #1

KOH

No you dont ma firend! i was woundering, if they screwed up in a question like that in an exam? what would happen?

Absolutely nothing. They may give everyone the marks, or just miss the question out when marking it and alter the total marks. Happened in my Science modular (it was AQA admittedly) and they just missed the question out and marked the paper out of 88 instead of 90

Reply 11

Pixelfairy #1

Absolutely nothing. They may give everyone the marks, or just miss the question out when marking it and alter the total marks. Happened in my Science modular (it was AQA admittedly) and they just missed the question out and marked the paper out of 88 instead of 90

HMMMMMM

Reply 12

john !!

14

KOH

holy macro, shit, how the hell did they screw that up?? MAN!! i dunno what to say, ive been trying the question since ever!!! :mad:

It's only a specimen, so it isn't checked ten times (or so) like the proper ones are.

Reply 13

LS.

8

Pixelfairy #1

Absolutely nothing. They may give everyone the marks, or just miss the question out when marking it and alter the total marks. Happened in my Science modular (it was AQA admittedly) and they just missed the question out and marked the paper out of 88 instead of 90

They would? That's good to know. There are few mistakes on specimin papers (biology OCR), but then there were some on some real OCR chem papers too.

Reply 14

john !!

14

I remember the Edexcel maths paper last year for GCSE and there was a mistake - the graph paper was drawn wrong and one unit had only 4 divisions. They would probably miss that question out. Although I think that's unfair, as it's effectively giving everyone 100% on that part, better than last year or the next year. They should average their other marks and then give them the same for that question.

Reply 15

ma cousin is really anoying me on msn so i asked her to do that question ...should b funny

Reply 16

http://www.mrhughes.net/files/papers/M1/Jun02.pdf

on qu 6:
A man travels in a lift to the top of a tall office block. The lift starts from rest on the ground floor and moves vertically. It comes to rest again at the top floor, having moved a vertical distance of 27 m. The lift initially accelerates with a constant acceleration of 2 m s-1 until it reaches a speed of 3 m s−1. It then moves with a constant speed of 3 m s−1 for T seconds. Finally it decelerates with a constant deceleration for 2.5 s before coming to rest at the top floor.
it should be ms-2
lol

Reply 17

SasunD

10

tammypotato

http://www.mrhughes.net/files/papers/M1/Jun02.pdf

on qu 6:
A man travels in a lift to the top of a tall office block. The lift starts from rest on the ground floor and moves vertically. It comes to rest again at the top floor, having moved a vertical distance of 27 m. The lift initially accelerates with a constant acceleration of 2 m s-1 until it reaches a speed of 3 m s−1. It then moves with a constant speed of 3 m s−1 for T seconds. Finally it decelerates with a constant deceleration for 2.5 s before coming to rest at the top floor.
it should be ms-2
lol

well, it is not that funny. nobody would slip up on that error, you would be stupid to seeing as it does say acceleration before it.
but anyway, the examining boards make too many mistakes altogether.

Reply 18

SasunD

well, it is not that funny. nobody would slip up on that error, you would be stupid to seeing as it does say acceleration before it.
but anyway, the examining boards make too many mistakes altogether.

when i read it i was gona use 2 as the velocity so if i was in an exam i would have gt it wrong!

Reply 19