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# Edexcel A2 Physics Unit 5 'Physics from Creation to Collapse' watch

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1. What do yu think the A grade boundry would be?
2. I thought it was easy overall although a couple of the multiple choice were difficult and I realised after the exam I forgot to divide the total distance moved by the bridge by 2 to find amplitude.
3. (Original post by WindsorHL3)
I thought it was easy overall although a couple of the multiple choice were difficult and I realised after the exam I forgot to divide the total distance moved by the bridge by 2 to find amplitude.
I thin I too have made the same mistake.****
4. C'mon arnt you'll discussing the paper?
5. (Original post by Pegasus92)
I thin I too have made the same mistake.****
lol I was so annoyed at myself when my mate told me I made that mistake, when I came out I couldn't think of anything I got wrong and then he told me.
6. (Original post by Pegasus92)
What do yu think the A grade boundry would be?
About 60-65. It wasnt hard at all I think.
I did divide that total distance by 2 for the bridge's amplitude.

(Original post by Pegasus92)
How did you do the mouse thing?
Well, since it was placed vertically first
f = 1/T
T = 2п√(m/k)
F = ma = -kx
a = g = 9.81
m = 0.15
x = 0.2
Not really sure about the numbers.
It could be done a bit different way.. I did both.
7. I might have lost 15 marks in total or more.
About 60-65. It wasnt hard at all I think.
I did divide that total distance by 2 for the bridge's amplitude.

Well, since it was placed vertically first
f = 1/T
T = 2п√(m/k)
F = ma = -kx
a = g = 9.81
m = 0.15
x = 0.2
Not really sure about the numbers.
It could be done a bit different way.. I did both.
How many marks was that amplitude question?
9. Did everybody get an extra formulae list, as there was a mistake in the paper?
I guess yes, as the papers are supposed to be the same around the globe..
Did you spot the mistake in the formuale?
10. (Original post by Pegasus92)
How many marks was that amplitude question?
Oh, this was (I think the only one) 5 mark question..
Oh, this was (I think the only one) 5 mark question..
Do you remember the question, the parts concerning amplitude?
Did everybody get an extra formulae list, as there was a mistake in the paper?
I guess yes, as the papers are supposed to be the same around the globe..
Did you spot the mistake in the formuale?
yeah got it?
What was the mistake??
13. (Original post by Pegasus92)
yeah got it?
What was the mistake??
Hehe.. they put for G (gravitational constant) units Nm-2kg-2 instead of Nm2kg-2.

(Original post by Pegasus92)
Do you remember the question, the parts concerning amplitude?
11 or 18? Or multiple choice?
14. (Original post by Bronze92)
the axes are obviously wrong, right?
EDEXCEL -.-"
Yes - the axis labels are the wrong way round. The periodicity should be shown as being in time; the child cannot be in several places at once. If the labels are swapped to make them right, then maximum velocity is (amplitude)*(angular velocity) = Aω. A=1.5 metres and ω = 2π/period = 2π/3 radians per second, so max velocity is 1.5 * 2π/3 = π metres per second.
Hehe.. they put for G (gravitational constant) units Nm-2kg-2 instead of Nm2kg-2.

11 or 18? Or multiple choice?
18
16. - The mistake on the formula sheet was just an error for the units of 'G'

- Grade boundaries for physics (as far as I know) have never been 80% of a paper. 58 would seem fair.

- I forgot to divide that thingymajig by two to find the amplitude

- But the paper was sexy
17. (Original post by JayAyy)
- The mistake on the formula sheet was just an error for the units of 'G'

- Grade boundaries for physics (as far as I know) have never been 80% of a paper. 58 would seem fair.

- I forgot to divide that thingymajig by two to find the amplitude

- But the paper was sexy
Jay did find f in Q11?
18. (Original post by Pegasus92)
18
Yeah, I remember it.
19. (Original post by Pegasus92)
Jay did find f in Q11?
I got 1.11Hz
Yeah, I remember it.
My question is what was the Question?

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