Arsey's M2 Edexcel revision and resources thread

Okay and when rods are stuck on a wall (hinges) does it matter which direction my X and Y force goes? Like in the equations and diagrams, will I still get right answer regardless? There was one question where this rod was about to slip from this hinge question. It had a mass at the very end so I assumed that the bit near the wall will try to slide up but it was going to slide down? I don't understand how

Have you tried the june 2010 paper? I found that so easy. Almost got full marks. I keep doing good in some papers and bad in others. I have always got over or around 55 but I need to get solid 60s

Does anyone know why the boundaries for jun 11 and jan 12 were extremely high? I haven't attempted them but assuming they are really easy?

Pretty nervous for this paper as M1 was my worst module last year. Hope it's gonna be okay.

Thanks for all the revision materials Arsey! You're the best


Posted from TSR Mobile

Yeah the maths will work itself out, say if you put Y upwards and it's actually downwards, through resolving vertically upwards you would get a negative value, thus telling you it's actually in the other direction and vice versa

Yep they were almost C2 difficulty

nice. I tried the same thing with the last impulse question. Getting it the wrong way around. But it gave me a negative value which meant that the direction of motion is now reversed and because I had arrows on my diagram, it helped me understand which way it will go. In impulse questions with restitution, where you don't know final velocities of either... same thing applies right? It doesn't matter which way they are going? But if they are going the same way, I have to do sub values in so that the final velocities show that they don't collide?

i.e. if I have A and B colliding and their final speeds are X and Y respectively. I draw the final velocities in --> way Y has to be bigger than X so that it doesn't collide again. And if for some reason X actually reverses after collision, I would get negative answer?

Yeah the that's the principle behind the whole of collisions. E.g a ball A hits B, B then rebounds off a wall.

If Final velocity of A comes out of negative then it is going in reverse, B obviously changes direction hitting the wall and if it's moving faster than A it will catch up and collide again, all about visualising moving balls and understanding the topic really, the maths isn't too difficult

I have a quick question. Sometimes, I don't follow the method the mark scheme has. And because I use rounded answers (3sf ones) I get different values from mark scheme. Not by a lot. For instance instead of 8.49, I got 8.47

Sometimes they round to 2 sf (idk why) but I round to 3 all the time if I can. And sometimes you are expected to use a formula in a given context but you can get the same answer a different way. How many marks will I lose if I don't follow the mark scheme exactly? It doesn't provide any alternate solutions. I am assuming for the 1 dp difference answers, I will still get full mark?

Normally they round to 2sf when using g as the value we us is 9.8 which is also to 2sf

so if mine is to 3 do I lose final mark?

Im not sure, but I don't think you would as I give all my answers to 3sf too and have been told to do so

Could anyone shed some light on question 4 on the June 2009 paper. It's the first ever M2 question I really can't get my head around.

Does anyone know what freely hinged means in the context of M2. I think that's where the problem lies in this question for me.


Posted from TSR Mobile

Hinged just means there is a reaction in two directions. Upward and horizontal acting at point A or wherever the wall is connected to the rod. Questions like that you usually obtain magnitude of tension or whatever thrust etc by taking moments, then resolving horizontally and vertically, finally if it asks for the magnitude, just use pythagoras.