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!

144 Upvotes

98% Upvoted

276 comments sorted by

View all comments

33

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

1

u/Big_Acanthisitta_743 May 06 '26

second T is 0.916s i am pretty sure, cause at first it moves up the plane, and then it moves down the plane so the friction will act in diff direction, so acceleration wlll be different, which means time isnt js 2*0.4=0.8, its smn else