1. Bernoulli's Principle: This principle states that as the speed of a fluid (like air) increases, the pressure it exerts decreases. In an airplane wing, the top surface is curved, forcing the air to travel a longer distance than the air flowing underneath. This creates a higher speed of air flow over the top of the wing, resulting in lower pressure compared to the bottom. This pressure difference creates an upward force, contributing to lift.
2. Newton's Third Law of Motion: This law states that for every action, there is an equal and opposite reaction. The airfoil shape of the wing deflects the air downwards as it passes over it. This downward deflection of air creates an upward force on the wing, according to Newton's Third Law. This force is another significant contributor to lift.
Therefore, the combination of Bernoulli's Principle (pressure difference due to different air speeds) and Newton's Third Law (reaction force from deflected air) together produce the lift force that allows an aircraft to fly.
