Question -
Answer -
Speed of wind on the upper surface of the wing, V1 =70 m/s
Speed of wind on the lower surface of the wing, V2 =63 m/s
Area of the wing, A = 2.5 m2
Density of air, ρ = 1.3 kg m–3
According to Bernoulli’s theorem, we have the relation:
Where,
P1 =Pressure on the upper surface of the wing
P2 =Pressure on the lower surface of the wing
The pressure difference between the upper and lower surfaces ofthe wing provides lift to the aeroplane.
Lift on the wing 
= 1512.87
= 1.51 × 103 N
Therefore, the lift on the wing of the aeroplane is 1.51 × 103 N.