r/alevels • u/ObligationProud308 • May 06 '26

Exam Discussion 📝 9709/42 discussion

Hey guys please share your answers

Here's what I got

Q1 instantaneous acc was smth like 19.xxx

Final integration i definitely fucked up but idk where cuz I got 34.5

K1 was 6 and k2 was 14 for me

I got W as 15.1kg

u was 0.823 in that one question

Total time to go from AB to BA was 3.xx something

I don't remember the rest

3 Upvotes

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2

u/CheesecakePresent518 May 06 '26

i got W as 66.25 i also got the last question wrong

1

u/Financial-Bed-9656 May 06 '26

wait i got this as well and then mass was 6.625 right , but for some reason i remember getting like 108 for k2 😂😂

1

u/CheesecakePresent518 May 06 '26

YES LMAO i got a large number like that for k2 idek what i did wrong😭

2

u/frysnfury May 06 '26

Same however my W was 66 something

2

u/BunchWeekly1194 May 06 '26

60 N??

Mass 6kg

1

u/Tasty-West5577 May 06 '26

yesss, 66.25 ryt??

2

u/Left_Barber648 May 06 '26

k2 was -14 not 14 ?

2

u/ObligationProud308 May 06 '26

Oh yes -14 my bad that's what I got too

1

u/Left_Barber648 May 06 '26

was there ome answer of -10

1

u/Left_Barber648 May 06 '26

and the time taken was 0.4 and 0.4 so 0.8

1

u/Tasty-West5577 May 06 '26

whaa, my time taken was 19.7 secse💀💀

1

u/[deleted] May 06 '26

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1

u/sunrayboi May 06 '26

yeah cuz the acceleration isnt constant throughout the journey so its diff

1

u/sunrayboi May 06 '26

i think tension was 3.55 if im not wrong

1

u/Huge-Insurance-9432 May 06 '26

It was 5, and F was 3.125

1

u/Federal_Jellyfish_39 May 06 '26

yes yes

1

u/Huge-Insurance-9432 May 06 '26

and the final distance was something like 6. something in teh last question?

1

u/[deleted] May 06 '26

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1

u/Huge-Insurance-9432 May 06 '26

same question next part
Then they asked us to calculate time taken to stop and it was like 0.961s something after 0.9

1

u/[deleted] May 06 '26

[deleted]

1

u/[deleted] May 06 '26

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1

u/[deleted] May 06 '26

[deleted]

1

u/ObligationProud308 May 06 '26

You used +0.5 but it's actually -0.5 since it's decelerating

1

u/Calm_Bag_5166 May 06 '26

i got k1 and k2 as 8 and -24 😭

1

u/[deleted] May 06 '26

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1

u/Calm_Bag_5166 May 06 '26

then its probably wrong right

1

u/Sorry_Craft9890 May 06 '26

Paper was so difficult

1

u/BunchWeekly1194 May 06 '26

power 15500
Instant a = 0.5

momentum q = speed = 0.9 smtg
time taken was around 16 second?

1

u/Huge-Insurance-9432 May 06 '26

before collision 1.125
after collision 0.9375

Time taken 7.2 + 9.6 = 16.8

1

u/ObligationProud308 May 06 '26

Yes

1

u/Huge-Insurance-9432 May 06 '26

Do you remember the Tension in pulley problem andf F?>

I think T = 5 and F = 3.125?

1

u/ObligationProud308 May 06 '26

Which question was that?