Aeroplanes fly by a combination of power from the engines and lift provided by the wings. These are shaped in such a way that air flowing along the upper surface takes a longer path than the air flowing along the lower surface. As a result when an aircraft moves forward, the air flowing above the wings moves faster than the air flowing below the wing, creating a low pressure above the wing according to Bernoulli’s law. This difference in pressure below and above the wings causes lift. As the speed of the aircraft on the runway increases, the lift also increases, eventually overcoming the downward force of gravity. The aircraft also uses the thrust created by its engine to climb and after reaching a certain height cruises along in a horizontal direction.
