The force on an object is equal to its mass times its acceleration or equivalently to its rate of change of momentum.Isaac Newton did not propose a theory of flight but he did provide Newton's Laws of Motion the physical laws which can be used to explain aerodynamic lift. ![]() This is where Newton's Laws come to the rescue. Nor does it explain how aircraft and other structures with flat plate wings or even kites and paper aeroplanes can fly or remain airborne. Unfortunately Bernoulli's Principle does not explain how an aeroplane can fly upside down. The consequence of this is that the air above the wing has a lower pressure than the air below below the wing and this pressure difference creates the lift. This is known as Bernoulli's PrincipleĪccording to Bernoulli's Principle, the air passing over the top of an aerofoil or wing must travel further and hence faster that air the travelling the shorter distance under the wing in the same period but the energy associated with the air must remain the constant at all times.
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