[JU1CY-FRU1T]

Im actually ready for this exam. Just make sure you know everything in the syllabus. At least they give us all of the formulas. We might need to just re arrange them. Difference between nuclear fusion and fission. If you dont know the answer just make one up. I think plum pudding model will come up. :/

[21stcenturyphantom]

(Original post by JU1CY-FRU1T)
Im actually ready for this exam. Just make sure you know everything in the syllabus. At least they give us all of the formulas. We might need to just re arrange them. Difference between nuclear fusion and fission. If you dont know the answer just make one up. I think plum pudding model will come up. :/

Make sure you remember how to rearrange the transformer equation where you have Vp/Vs = Np/Ns etc.

[daniya12]

how did everyone find it?

[notleyhigh]

aqa has chose to screw us over again...

[pseudonymegg]

I thought it was ok, what did you get for the mass of the skateboard?

[Pinkjumpers]

I got 2.2kg!
A lot of my other class did too..
What about everyone else?

[pseudonymegg]

yerp me too

[pseudonymegg]

what did people get for the one which was linke, why do the boys move at different momentums?

[Superboy]

(Original post by pseudonymegg)
what did people get for the one which was linke, why do the boys move at different momentums?

Because they have different velocities; different direction.


This was posted from The Student Room's iPhone/iPad App

[07jonesy]

Grade boundaries?


This was posted from The Student Room's iPhone/iPad App

[morgh002]

(Original post by Pinkjumpers)
I got 2.2kg!
A lot of my other class did too..
What about everyone else?

why was it 2.2? Confused!

[pseudonymegg]

does anyone know when there's going to be an unofficial mark scheme?

[morgh002]

also someone write a potential mark scheme?/grade boundaries?

[pseudonymegg]

(Original post by morgh002)
why was it 2.2? Confused!

you had to work out the momentum of the boy first momentum = mass x velocity that came to 22 (i think) then because the momentum of the boy and skateboard were the same you could use 22kg m/s to work out the mass of the skateboard mass = momentum/velocity 22/10 (the board recoiled at 10m/s) so the mass was 2.2kg

[girlwithouthands]

(Original post by morgh002)
why was it 2.2? Confused!

See, the momentum was 22 kg m/s. You had to work that out from the boy's details. He had a mass of 44kg and a speed of 0.5, I think. And 44kg x 0.5m/s = 22 kg m/s.
Therefore, to solve for the skateboard:
22 kg m/s = X kg x 10 m/s.
X kg = 22 kg m/s / 10 m/s.
X = 2.2 kg!

Voila

[osama2]

what component did everyone get?

[pseudonymegg]

variable resistor

[osama2]

what did you put for the anomalous result like what caused it?

[Charlesgreenough]

random error^

[osama2]

(Original post by Charlesgreenough)
random error^

yeah i put that to phew!