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# The Edexcel M1 (16/05/12 - AM) Revision Thread Tweet

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1. Re: The Edexcel M1 (16/05/12 - AM) Revision Thread
(Original post by arnab)
what does it mean when in a vector question, it says, due north-west or south-west or south-east?

can some one pleassseeeeee go through these stuff with me about vector?
A member posted this earlier:

(Original post by oli_G)
If it is parallel to i the j component will equal to zero

If it is parallel to j the i component will equal to zero

If it is travelling NE (ie it is parallel to the vector i + j) the i component will equal the j component

If it is travelling SE (ie it is parallel to the vector i - j) the i component will equal minus the j component

If it is travelling NW (ie it is parallel to the vector -i + j) minus the i component will equal the j component

If it is travelling SW (ie it is parallel to the vector -i - j) minus the i component will equal minus the j component

Hope this helps
2. Re: The Edexcel M1 (16/05/12 - AM) Revision Thread
How is everyone feeling about tomorrow?

I'm really bad at those tension on a pulley questions where you have to find the height/time of a particle after the rope becomes slack. Argh hoping sooo much that dosent come up! I'll love it if a lot of moments and momentum comes up, and easy kinematics questions please, and I don't mind resolving forces on an inclined plane. Just hoping that the vectors and connected particles questions they ask are doable!! Oh, and hoping for no 7 mark kinematics question, cos theyre normally quite hard

Oh god, tomorrow is going to be tough
3. Re: The Edexcel M1 (16/05/12 - AM) Revision Thread
(Original post by Mystic Creature)
How is everyone feeling about tomorrow?

I'm really bad at those tension on a pulley questions where you have to find the height/time of a particle after the rope becomes slack. Argh hoping sooo much that dosent come up! I'll love it if a lot of moments and momentum comes up, and easy kinematics questions please, and I don't mind resolving forces on an inclined plane. Just hoping that the vectors and connected particles questions they ask are doable!! Oh, and hoping for no 7 mark kinematics question, cos theyre normally quite hard

Oh god, tomorrow is going to be tough
I cant give you a tip on vectors but for the tension pully questions where the string breaks just break the information into two parts and you find a by putting it into the tension equations (on ones with an inclined plane, the tension =0 because the string has broke) and once you've got a use suvat to find v. Then use suvat again to find what ever you need and use your v from the other question as u hope it helps
4. Re: The Edexcel M1 (16/05/12 - AM) Revision Thread
(Original post by JordanS94)
I cant give you a tip on vectors but for the tension pully questions where the string breaks just break the information into two parts and you find a by putting it into the tension equations (on ones with an inclined plane, the tension =0 because the string has broke) and once you've got a use suvat to find v. Then use suvat again to find what ever you need and use your v from the other question as u hope it helps
Yep thanks man, ill try remembering that

Good Luck Everyone!
5. Re: The Edexcel M1 (16/05/12 - AM) Revision Thread
in the jan 2012 paper, q8c, how do you know you need to look at the time in moves up the plane before coming to rest and not when it moves down the plane and comes to rest?
6. Re: The Edexcel M1 (16/05/12 - AM) Revision Thread
(Original post by Cleoleo)
in the jan 2012 paper, q8c, how do you know you need to look at the time in moves up the plane before coming to rest and not when it moves down the plane and comes to rest?
We need to find the distance between the instant when the force is removed and the
instant when it comes to rest.

The particle is travelling up, so when the force is removed it will continue to travel up until it speeds gets to zero(which means it is at rest).
7. Re: The Edexcel M1 (16/05/12 - AM) Revision Thread
(Original post by aymaanx)
(Original post by anjelofernando)
Attachment 148287

ive attached my working in the above post hope it helps
8. Re: The Edexcel M1 (16/05/12 - AM) Revision Thread
guys quick question got my exam in 90mins
on a smooth inclined plane when the string or whatever pulls the particle up the slope what will be the deceleration (downward acceleration) of the particle will it be 9.8m/s^2
and for a rough inclined plane under the same circumstances will the acceleration be found using F=ma where F is the opposing force?
9. Re: The Edexcel M1 (16/05/12 - AM) Revision Thread
(Original post by 99llewellyn99)
guys quick question got my exam in 90mins
on a smooth inclined plane when the string or whatever pulls the particle up the slope what will be the deceleration (downward acceleration) of the particle will it be 9.8m/s^2
and for a rough inclined plane under the same circumstances will the acceleration be found using F=ma where F is the opposing force?
Thats a good question.... in physics I have learnt that it is 9.8 m/s^2,
But havn't come across one in physics yet
10. Re: The Edexcel M1 (16/05/12 - AM) Revision Thread
(Original post by oli_G)
Right for part (a)

You know the man is NE of the point with position vector . This means his horizontal and vertical displacement from this point is equal. We also know he is km East of the mast. So his position vector is km

(b)

The distance of the man from the origin is
Moving at a speed of they will reach him in 2 hours.

(c)

If SE of radio mask he will have a position vector of km.

Thanks
11. Re: The Edexcel M1 (16/05/12 - AM) Revision Thread
(Original post by 99llewellyn99)
guys quick question got my exam in 90mins
on a smooth inclined plane when the string or whatever pulls the particle up the slope what will be the deceleration (downward acceleration) of the particle will it be 9.8m/s^2
and for a rough inclined plane under the same circumstances will the acceleration be found using F=ma where F is the opposing force?

it depends if it is moving upward,
(the upward forces acting on the particle)-(downward forces acting on the particle) = ma

and
vise versa
12. Re: The Edexcel M1 (16/05/12 - AM) Revision Thread
Good luck guys !
13. Re: The Edexcel M1 (16/05/12 - AM) Revision Thread
Good Luck Guys =D Hope for a good paper and hopefully collisions come up in a vector question. Hasn't come up since 09 i think :/
14. M1
Do i lose marks for not writing the direction i am resolving in in my working out ?
15. Re: M1
often the direction can be indicated with a pair of arrows:

up down for vertical resolving

left right for horizontal resolving.

always try and make the marker's life easier.
16. Re: M1
can your answers be in vector form even if the mark scheme answers are in i j notation
17. Re: The Edexcel M1 (16/05/12 - AM) Revision Thread
whens mark scheme gonna be up?
18. Re: The Edexcel M1 (16/05/12 - AM) Revision Thread
this is probably gonna have the highest curve ever.. maybe 68 for an A
19. Re: The Edexcel M1 (16/05/12 - AM) Revision Thread
20. Re: Edexcel revision for Mechanics (M1) 16/05/12
(Original post by brittanna)
And I would also recommend doing question 5 in solomon paper K, its one of the weirder ones that you wouldn't really learn about, you just have to be able to igure it out for yourself.
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