2007-11-07 13:59:26 · 6 answers · asked by Anonymous in Science & Mathematics ➔ Physics
Air resistance.
2007-11-07 14:05:19 · answer #1 · answered by Yahoo! 5 · 0⤊ 0⤋
Air Resistance- Just like an air plane a bird has wings to create air resistance. Each time a bird flaps its wings it pushes in the opposite direction of gravity useing the air around it.
2007-11-07 22:10:39 · answer #2 · answered by katie72 1 · 0⤊ 0⤋
Firstly they become air borne by flapping their wings which pushes the air underneath down and they get an equal but opposite reaction which forces them up. Once in flight they can spread their wings like the wings of an aeroplane this creates an pressure diff between the air just underneath their wings and the air just above their wing. So the air from underneath rushes up and lifts the bird (aeroplane use the same principle) but they do have to flap their wings at regular intervals just like an aeroplane needs a huge jet engine.
2007-11-07 23:05:28 · answer #3 · answered by E=MCPUNK 3 · 0⤊ 0⤋
birds overcome gravity by exerting force when they flap their wings. this flapping causes air from underneath to be forced down at pressure which causes an upward force to the opposite direction( you know the 3rd law of motion stuff) But this action will only be a short time because the bird also be tired and so it will be pulled back by the force of the earths gravity
2007-11-07 22:24:00 · answer #4 · answered by Nestor G. F 1 · 0⤊ 0⤋
uses it's wings to fly
2007-11-07 22:06:20 · answer #5 · answered by tom4bucs 7 · 0⤊ 0⤋
It can't, it is designed to fly, but it's not using antigravity.
2007-11-07 22:07:34 · answer #6 · answered by Mark G 7 · 1⤊ 0⤋