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# EDEXCEL mechanics 3/ june 06 pm watch

1. (Original post by .A.)
Heh if you think this was harder than Jan 08 then we are all fine. Because grade boundary for that was like 55 i think.

Pressure? thats what you have to tell us.

.A.
There was nothing really tricky in the Jan 08 paper though. Fine the energy question required a bit of diagram manipulation but thats about it.

Hopefully the boundaries are low.
2. (Original post by .A.)
Heh I am really worried about SHM. Did you guys what did you get for the distance away from B.

.A.
it was 0.016m away from B is that what you got? because you had to take what you found out away from 0.12m
3. (Original post by kcfch)
it was 0.016m away from B is that what you got?
I got that.

As for grade boundaries, I thought it was much harder than January 2007 which was 56/75 for an A.
4. Can someone remind me what W was in shm so that I do the calculation now.

a=0.12. t=2

.A.
5. (Original post by .A.)
Can someone remind me what W was in shm so that I do the calculation now.

a=0.12. t=2

.A.
I think it was:
Which would have meant that T = 3 seconds, but I'm not sure.
6. Alright. 0.0161 (3.s.f) was the right answer.

.A.
7. (Original post by alex_hk90)
I think it was:
Which would have meant that T = 3 seconds, but I'm not sure.
I got that as well
Finally something I recognise!
8. Does anyone remeber the answer for question 1.
9. (Original post by .A.)
Does anyone remeber the answer for question 1.
the first part was a show that, which i got, but i tihnk my method was completely wrong. the second part was about ...oh yeah the velocity as it reaches the tube end right? yeah i did
gain in KE + gain in GPE = loss in EPE
then lots of number crunching i cant remember my final answer though
10. I knew exactly what to do on q3, but I panicked and didn't write it down.
11. Urf, I found this exam really hard. Granted, I tried this with nil revision since I had a crazy-hard exam before it, but it was still really difficult.

Didn't manage to do the last question, but I did reduce it to the integral I think (though think I forgot to root the 6). Doing FP2 so I should have been able to do it more.

It's also very annoying that in the last minute I realised I hadn't done a 6 mark question.

(Original post by .A.)
Alright. 0.0161 (3.s.f) was the right answer.

.A.
Hehe don't remember this, is this for the distance from B in that SHM question?
12. (Original post by alex_hk90)
That sounds familiar; if I remember correctly:

But I can't remember the working.

I'm SURE the question was find omega in terms of g and h....

Anyway, I got ....I think.

That was the biggest ***** of a paper that I have ever had the displeasure in taking. I hope the grade boundaries are really low.
13. (Original post by AlphaWulf)
Hehe don't remember this, is this for the distance from B in that SHM question?
Yes it was, the last part of the SHM question.
14. (Original post by IChem)
I'm SURE the question was find omega in terms of g and h....

Anyway, I got ....I think.

That was the biggest ***** of a paper that I have ever had the displeasure in taking. I hope the grade boundaries are really low.
ohyeah maybe it was g, in that case i got rt(2g/5h)
15. can somebody remind me of question 3 ?

Btw i recall an answer smthing like 4/15 rt15
did anyone else get smthing like that?
16. the paper was really hard...much harder than the other papers BY FAR ... i got like 90% in Jan08..but this paper...go knows....
17. *god
18. (Original post by IChem)
I'm SURE the question was find omega in terms of g and h....
It might have been; I can't remember it that well, only that there was a 2/5 involved.

(Original post by IChem)
That was the biggest ***** of a paper that I have ever had the displeasure in taking. I hope the grade boundaries are really low.
I agree, I think that 54/75 would not be unreasonable for an A.
19. I recall an answer of T=3mg
20. (Original post by Sepulamb)
I recall an answer of T=3mg
hmmm i remember a T=3/2 mg dont remember a 3mg though...do you remember which question?

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