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# M1 24/05/12

1. (Original post by cazman34)
How about the acceleration of the particle moving down the slope? Tell me you got 1.06ms^-2 as well haha
1.05 m/s^2 so yeah, close enough

Edit: I rounded alpha here
2. For that last question were we ment to split the shapes into two or three? Bc I split it into 3. And has anyone got the paper??
3. What did everyone get as alpha?
4. I found the test today really quite nice, in comparison to all the other papers.

I got stuck on finding the tension AP (question 6) because I managed to skip over the part which said P had a weight, so ended up with the tension equal to 0. Realised my mistake in the end.

Other question I probably lost a mark on is the height the sky diver fell. I rushed it and got height is aprox. 817.3m or something similar to that. Anyone else get that?
5. (Original post by cazman34)
How about the acceleration of the particle moving down the slope? Tell me you got 1.06ms^-2 as well haha
I got that
6. (Original post by Astonix)
I found the test today really quite nice, in comparison to all the other papers.

I got stuck on finding the tension AP (question 6) because I managed to skip over the part which said P had a weight, so ended up with the tension equal to 0. Realised my mistake in the end.

Other question I probably lost a mark on is the height the sky diver fell. I rushed it and got height is aprox. 817.3m or something similar to that. Anyone else get that?
I got something around 817.3 too, probably exactly that :P
7. (Original post by priteshp)
For that last question were we ment to split the shapes into two or three? Bc I split it into 3. And has anyone got the paper??
I split it into 3. You were meant to I think. They drew dotted lines splitting it up into three, and I don't know a simple way of finding the area and CoM of an L-shape without splitting it into 2.
8. (Original post by cazman34)
What did everyone get as alpha?
If you're on about question 6, I got alpha as about 54 I think.
9. (Original post by cazman34)
I got something around 817.3 too, probably exactly that :P
807.5m if I remember rightly
10. (Original post by cazman34)
What did everyone get as alpha?
Which one? I remember alpha being 52.57 or something..

I thought the exam went really well
I'm glad that no trick questions were thrown out there; I was panicking like mad prior to the exam.

Does anyone remember what they got for v on question 7 - the hot air balloon question? I got 49, which for some reason doesn't seem right.
11. (Original post by Astonix)
I split it into 3. You were meant to I think. They drew dotted lines splitting it up into three, and I don't know a simple way of finding the area and CoM of an L-shape without splitting it into 2.
Pheww I can't remember my answer most probs got most of marks for that anyways.

12. (Original post by Perpetuallity)
807.5m if I remember rightly
Ah yes, I got that Really happy now!
13. (Original post by ConstantlyStressed)
Which one? I remember alpha being 52.57 or something..

I thought the exam went really well
I'm glad that no trick questions were thrown out there; I was panicking like mad prior to the exam.

Does anyone remember what they got for v on question 7 - the hot air balloon question? I got 49, which for some reason doesn't seem right.
Yep, that's what I got

v=u + at = 0 + 5(9.8) = 49m/s
14. (Original post by ConstantlyStressed)
Which one? I remember alpha being 52.57 or something..

I thought the exam went really well
I'm glad that no trick questions were thrown out there; I was panicking like mad prior to the exam.

Does anyone remember what they got for v on question 7 - the hot air balloon question? I got 49, which for some reason doesn't seem right.
That is right what's what I got
15. (Original post by Perpetuallity)
Yep, that's what I got

v=u + at = 0 + 5(9.8) = 49m/s
Yes...I feel so relieved...

Now I've got C4 to study for..blegh
16. Yeah, I seem to be getting what others are getting. Some numbers I remember: 807.m for the SUVATs question, 29000N and 60kg for 1. a and b respectively. 0.4m for the equilibrium question. Coefficient of Restitution = 0.36. I remember a 41.2N, and alpha equaling 57.? somewhere.

A nice paper overall, I think I've lost some marks at the end of Question 3 and 9, but I got the main marks anyway. Hopefully the A grade boundary is around 58~
17. So for that alpha question did ppl do tan-1 the number they gave for the angle???
18. (Original post by priteshp)
So for that alpha question did ppl do tan-1 the number they gave for the angle???
I used,

and as you (should) know, the cos^2 and sin^2 cancel to 1, so left with R, which I then plugged back in to previous equations to get alpha.

I checked it with the tan method in the exam too and came out with the same answer.
19. Anyone have an unofficial mark scheme?

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