Science Trivia Question?????

[maverick2112]

Bernoulli's Principle.
An application of Bernoulli's principle is an air wing, where the shape gives the air plane its lift. Now if a military jet flies up-side-down the lift would be pointing downward, towards the Earth. Why does it not crash to the ground?

 

[marine]

thrust.

The plane is actually falling, but the tremendous amount of thrust it has going keeps it moving forward.

 

[Marco]

Correct me if I'm wrong....maybe I'm not thinking in terms of the same wing you may be thinking of....

...but isn't there lift created regardless whether the wing is upside down or right side up?...

 

[KMA]

Because the wing is still turning the air enough to overcome the drag.

Force = mass x acceleration-
Force = mass x change in velocity with time-
Velocity has both magnitude (speed) and direction-
Changing either the speed or direction of any flow generates a force-
Lift can be generated by many objects, including airplanes. Lift is what holds airplanes in the air, and most of the left is generated by the wings.

 

[THE KOD]

 

[Fat & Sassy]

 

[TossingSalads]

My boy KMA is wicked smart.

 

[MrChristo]

Marine is right, with the acceleration thing.

The faster (or lighter) a plane is capable of moving, the less curvature is required on the top of the wing (as shown in Scott's picture) to keep the plane in the air.
Military and stunt planes can fly upside down, but slow moving 'cilivian' planes and passenger planes can't.

Why doesn't a baseball fall to the ground as soon as it leaves a pitchers hand? Because of the acceleration (thrust) imparted on it by the pitcher.
It will start falling to the ground as it begins decelerating (almost immediately).
Planes don't decelerate though, because they have engines!
Hence....It keeps flying.

(I think!)