Question

4. In most of the planes where wings are curved at the top and smoother at the bottom, the lift is
caused as the air pressure is lower

Answer 1

Explanation:

The top surface of the wing is curved (aerofoil shape). The air moving across the top of the wing goes faster than the air travelling under the bottom. Because it's moving faster, the air on top of the wing has less air pressure on the wing than the air below the wing.