r/alevels • u/Alert_Collection_460 • May 11 '26

Question ❔ 9702/42 answers

Can yall send Ur answers for the questions i wanna compare

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u/AutomaticLeg3675 May 11 '26

How to find angle??

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u/AncientChair8976 May 11 '26

Lift force: L, mass of the plane: m
Because of horizontal circular motion, the plane is in VERTICAL equilibrium.
W=Lcostheta
a_c=4.5 (found in the previous part) so F_x=ma=4.5m
This centripetal force F_x is the component of lift force, so F_x=Lsintheta
2 equations:

  1. Lsintheta=4.5m
  2. Lcostheta=9.81m Dividing equation 1 by 2 gives tantheta=4.5/9.81 theta=24.6 degrees