Question

The air that flows over the top part of an airplane's wing moves faster than the air that flows across the bottom. This faster moving air causes the wing to rise.
Which of the following principles or laws helps explain why the wing rises?

Boyle
Bernoulli
Pascal
Charles

Answer 1

As an airplane moves through the air, its wings cause changes in the speed and pressure of the air moving past them. These changes result in the upward force called lift.

The Bernoulli principle states that an increase in the speed of a fluid occurs simultaneously with a decrease in the pressure exerted by the fluid.

A wing is shaped and tilted so the air moving over it moves faster than the air moving under it. As air speeds up, its pressure goes down. So the faster-moving air above exerts less pressure on the wing than the slower-moving air below. The result is an upward push on the wing—lift!