Edexcel M2 - 28/01/11

Did anyone get work done in Q4 as 3450J ????

I did work done = frictional force * distance

I use that to find velocity which I got as 10.2 and also I found out velocity another way by first finding acceleration and both answers were the same



Anyone remember distance which particle travel up and angle slope make with horizontal??????

YAY!!!

I messed up C4 so badly and I think i've got 100 in M2 and S2 lol.

Is the A* in Further Maths dependent on an A* in maths or are they completely independent?

It was to do with pulling something up a rough plane. Part a was to work out the work done I think and part b was to find the speed it reach when released. Do you remember which was the 5 mark part? I think I made a silly mistake on b. thanks

Work done against resistances = Work done to over come friction (that was the only resistance) x distance travelled.

Time for something to be 45 degrees below the horizontal means it's 135 degrees below the normal. tan 135 is -1, so the j vector divided by the i vector (t o a) would equal -1. As a result, I got time to be 40/49 seconds or 0.816 seconds and the velocity of it would be 3i - 3j so the speed would be 3 root 2. Did anyone else get that?

Work done against resistances = Work done to over come friction (that was the only resistance) x distance travelled.

I got 3450 or something like that and the speed going back down the hill to be 10.2.

It was being pulled up an inclined plane. Its weight would be a force down the plane, and thus opposes upward motion.

Sorry to be a pain and ask the same question again, but does anyone remember the marks for each question? I remember 1a) 3 marks 1b) 3 marks and 7) 10 marks but can't remember the rest! If none of the others the marks for question 4a and b would be helpful because I think I may have got part of this wrong and can then work out my rough mark. Thanks

4a) 6marks and 4b) was 5marks. 8b) 7marks. the CofM one (cant remember question number) part a) was 7marks and b) 3marks

I think I did very well on that test. For the centre of mass question, I got centre of mass being (11,11) and angle between AB and vertical when hung from A to be 24 degrees to the nearest degree.

Time for something to be 45 degrees below the horizontal means it's 135 degrees below the normal. tan 135 is -1, so the j vector divided by the i vector (t o a) would equal -1. As a result, I got time to be 40/49 seconds or 0.816 seconds and the velocity of it would be 3i - 3j so the speed would be 3 root 2. Did anyone else get that?

Work done against resistances = Work done to over come friction (that was the only resistance) x distance travelled.

I got 3450 or something like that and the speed going back down the hill to be 10.2.

For the question with the plank resting on the peg and we had to calculate mu, I got mu to be 0.517 or something close to that.

Oh yeh, and for the final question, did anyone get the velocity of P after colliding with another ball to be 2/9 ms^-1 towards the wall and so there'll be another collision between P and the wall?

Everything you've said I agree with, except I don't think you included the component of weight in part a?

Oh and I got 0.514 for mu.

yeh I probably got 0.514 just can't remember.

weight in what question?

Yeah, that's why i used -3 instead of 3 and i got the time to be 0.816.
No idea if that's right.

What percentage is needed to get an A*? I know in other exams, like C3 and C4, you need 90% or higher. Is it the same with M2? Or are the grade boundaries slightly lower?

You do not get A* on any individual modules.
There are only criteria placed on certain individual modules that must be met in order to obtain an overall A* grade in the A-level qualification.

Does anyone have the details and values for question7, the coefficient 10 marker, I wanna try and work it out again cos I got 0.60 :/