Question

Explain why while flying birds apply downward force on the air by their wings.​

Answer 1

hi mate here is your answer...

If a bird is just gliding (or "soaring"), that is, not flapping its wings, it flies in pretty much the same way that an airplane flies. The wings push air down, so by Newton's third law the air must push them up. Partly, the push comes from the angle the wings are held at and partly from the curvature of the wings.

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Answer 2

While flying birds apply downward force on air by their wings because Newtons third law states that for every action there is equal and opposite reaction.

By applying force on air they get a upthrust by air and which prevents them from falling on ground