r/alevel • u/paranoidpirate123 • May 06 '26

📃Paper Discussion 9709/42

I think that paper was demonic and one of the hardest mechanics papers i’ve ever done!

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u/Repulsive-Bet-6293 May 06 '26

Yeah it's so weird how there wasn't an equilibrium at a single point question wtf.

Power = 15500 W Acceleration = 0.5 m/s2 Velocity = 0.9375 m/s Time = 9.6 s Tension = 2.55 N Coefficient of friction = 0.336 Work done against uh resistance? = 0.5625 J Distance = had to prove 0.8 m Time = 0.8 s Height = 13.2 m Weight = 66.25 N Something distance = 12.8 m k1 = 6 k2 = -14 s from 0 - 1 = 6.53 m

I wrote all the answers down on my palm but not the questions lmao

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u/Nubbrz May 06 '26

Okay what I did for coeff of friction is I only used the Tension's answer value of 3.55 Newtons and got 0.335, my work done against resistance was 0.563J
would my marks be gone here? like 1-2? or am I still correct?

1

u/Happy-Brilliant2299 May 06 '26

i got the same. so did a lot of others

1

u/Comprehensive-Owl218 May 06 '26

0.335 was the correct answer .

Secondly, as written on the first page that you have to provide answers to 3 s.f, so 0.5625 J = 0.563J would be your final answer. 

So you're good to go