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What is the reaction force of a flying bird?

A:

Quick Answer

The reaction force of a flying bird is the upward lift by air it experiences when flapping its wings, according to The Physics Classroom. The reaction force by air is in line with Newton���s third law of motion, which states that every action invokes an equal and opposite reaction.

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Full Answer

A flying bird applies downward pressure on air when it flaps its wings. The air responds in kind by exerting force in the opposite direction, giving the bird a lift that is almost perpendicular to the wing surface. It is this force that prevents the bird from falling from the sky.

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