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P2 unofficial markscheme 2016 aqa

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Original post by TheAnon121
The acceleration was definitely not 22m/s^2. It was 12 m/s^2 as you had to work out the resultant force by doing 1850 - 740, giving you 1010.

1010/84 = 12 m/s^2


OMG!! That's what I got too! I thought I was crazy or something - you've given me hope!!:biggrin::biggrin:
Reply 61
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efaz_3
2
what box did you tick for the terminal battery pack in P2.
Reply 62
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efaz_3
2
Original post by SunnysideSea
OMG!! That's what I got too! I thought I was crazy or something - you've given me hope!!:biggrin::biggrin:


thats what i got
Original post by efaz_3
what box did you tick for the terminal battery pack in P2.

The first one, I think.

How did you find the exam(s)?
Reply 64
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MMM12
8
Original post by joshchamp125
People said it was a hard exam so they might lower the boundaries. About 44/60?

Lol i didnt even get 10 marks nevermind 44
Original post by Nagromicous
I got 52W

He weighed 65kg, did 12 per minute and lifted himself 0.4m every time.
e=mgh
For a single repetition you do 65 x 10 x 0.4 which is 260J per repetition
He did this 12 times which gives a total of 3120J.
It took him a minute which has 60 seconds so he uses 3120J in 60 seconds.
3120J/60s = 52J/s = 52 Watts
same
Reply 66
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efaz_3
2
Original post by Banana00
The first one, I think.

How did you find the exam(s)?
it was ok it wasnt too deep
Original post by Nagromicous
I don't think the acceleration was 22m/s^2

I get what you did; you did the thrust of the jetpack divided by the mass of the person + the jetpack, being 1850/84 which equals 22, but I think this is wrong.
I'm pretty sure, because they're accelerating upwards the resultant force will be the thrust of the pack minus the weight of the pilot and the jetpack which gives you 1010N.
1010/84 = 12m/s^2,
which is what I got.

Could be wrong though. But if you still think yours is right, please tell me why.


Yeah I got that too
Reply 68
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Miz9
1
Original post by ScrewTheExams
Also I wrote live wire and crossed it out and wrote earth wire :/

That's exactly what I did! Hated that paper so much
Reply 69
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Astiano
1
Should the jetpack question (calculation of acceleration) not have an answer of 12 m/s2? My reasoning is that before you divide by mass, you should take into account the force acting downwards (weight) and subtract it from the thrust force. That will be (1850 - 840) / 84
Reply 70
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Astiano
1
Original post by emily_jones
Yeah I got that too


Glad I'm not the only one here... My entire year barring like 3 people got that answer...
Original post by Astiano
Should the jetpack question (calculation of acceleration) not have an answer of 12 m/s2? My reasoning is that before you divide by mass, you should take into account the force acting downwards (weight) and subtract it from the thrust force. That will be (1850 - 840) / 84


that's what i did , hopefully it's right, idek if i got more than 15 marks lol rip
I got Abraham Lincoln for some reason on question 1
Reply 73
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Storm512
Is there no calculations on the alpha and beta decay
is there only this amount of questions seems a bit small compared to others (b2 and c2)
Hey the acceleration is not 22ms^-2 cuz u need to minus the weight.
hi yk for the 6 mark question did they give you a table

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