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# AQA A2 Mathematics MM2B Mechanics 2 - Monday 22nd June 2015 [Exam Discussion Thread] watch

1. (Original post by Tiwa)
Thanks so much! But I don't understand where the angle 70 comes from...
Basically, the angle is 70 because there's 20 degrees between the frictional force and the horizontal. The frictional force and "Rc" are perpendicular, meaning the sum of these angles is 110 degrees.

This means that, because the angles around the horizontal must sum to 180, then the angle between "Rc" and the horizontal must be 70 degrees.

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2. (Original post by CD223)
Basically, the angle is 70 because there's 20 degrees between the frictional force and the horizontal. The frictional force and "Rc" are perpendicular, meaning the sum of these angles is 110 degrees.

This means that, because the angles around the horizontal must sum to 180, then the angle between "Rc" and the horizontal must be 70 degrees.

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That makes perfect sense! Thank you so much!
3. (Original post by Tiwa)
That makes perfect sense! Thank you so much!
No worries! Happy to help! Feel free to post any other questions you get stuck with as it'll definitely help me and I'm sure others too

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4. (Original post by CD223)
No worries! Happy to help! Feel free to post any other questions you get stuck with as it'll definitely help me and I'm sure others too

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I will! I think it helped me that I drew a triangle between the forces Rc and the frictional force to get the angle 70!
5. (Original post by Tiwa)
I will! I think it helped me that I drew a triangle between the forces Rc and the frictional force to get the angle 70!
Drawing diagrams makes workings 100x easier in M2 haha.
6. (Original post by CD223)
Drawing diagrams makes workings 100x easier in M2 haha.
Definitely!
7. (Original post by Tiwa)
Definitely!
Do you use many video resources at all?
8. (Original post by CD223)
Do you use many video resources at all?
Not too often. However, I used them today and they were pretty useful. Btw, do you recommend using the Solomon papers for C3? Cause some of the C4 topics come up in those Solomon papers..
9. (Original post by Tiwa)
Not too often. However, I used them today and they were pretty useful. Btw, do you recommend using the Solomon papers for C3? Cause some of the C4 topics come up in those Solomon papers..
What resources do you use? I tend to use Jack Brown on YouTube. You?

Yeah Solomon papers are useful
10. (Original post by CD223)
What resources do you use? I tend to use Jack Brown on YouTube. You?

Yeah Solomon papers are useful
I was just watching videos by a man called Stu Gregory?
11. (Original post by Tiwa)
I was just watching videos by a man called Stu Gregory?
Oh I've not heard of him! Is he good?

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12. (Original post by CD223)
Oh I've not heard of him! Is he good?

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He's alright I guess. Although his voice is so boring to listen to.
13. (Original post by Tiwa)
He's alright I guess. Although his voice is so boring to listen to.
Oh no :L Jack Brown is good. My college do videos too but they're private so I've had issues sharing them on here ::

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14. (Original post by CD223)
Oh no :L Jack Brown is good. My college do videos too but they're private so I've had issues sharing them on here ::

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Ah I understand!
15. (Original post by Tiwa)
Ah I understand!
I've tried to upload power points to the first post of the thread. Do you think they look good?

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16. (Original post by CD223)
I've tried to upload power points to the first post of the thread. Do you think they look good?

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Yep! Thank you so much!
17. (Original post by Tiwa)
Yep! Thank you so much!
That's okay! Hope they're helpful. I thought they looked good.

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18. Has anyone done M2 June 2014?

I have a mock on it on Friday and wondered about its difficulty.

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19. (Original post by CD223)
Has anyone done M2 June 2014?

I have a mock on it on Friday and wondered about its difficulty.

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I haven't done it but I looked a the grade boundaries and they were generally high ish. 62 for an A and 68 for an A* I believe?
20. (Original post by Tiwa)
I haven't done it but I looked a the grade boundaries and they were generally high ish. 62 for an A and 68 for an A* I believe?
Oh thanks for the info! I'll see how hard it is tomorrow and post how hard I found it on here

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