Physics (AS & A Level) · Oct / Nov 2023 · Paper 12 · Question 4

An aeroplane is moving at a constant speed in a straight line at an angle θ to the horizontal. Four forces act on the aeroplane: thrust force T, weight W, lift force L and resistive force R. Which two equations must be correct?

1. AL = W cos θ and T = R + W sin θ
2. BL = W sin θ and T = R + W cos θ
3. CL = W cos θ and T = R – W sin θ
4. DL = W sin θ and T = R – W cos θ

As printed in the paper