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why does gravity don't acts on a flying airplane or bird
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why does gravity don't acts on a flying airplane or bird
**Gravity and the Force of Lift**

When it comes to the phenomenon of flying, there are two key forces at play: gravity and lift. Gravity is the force that pulls objects towards the center of the Earth, while lift is the force that acts in the opposite direction, allowing objects to overcome gravity and stay airborne.

**The Role of Lift**

Lift is generated by the wings of an airplane or the specialized feathers of a bird. As the airplane moves forward, the shape of its wings creates a pressure difference between the upper and lower surfaces. This pressure difference generates an upward force called lift, which counters the downward pull of gravity. Similarly, birds have wings that are specifically adapted for flight, and the motion of their wings through the air generates lift.

**Equal and Opposite Forces**

According to Newton's Third Law of Motion, for every action, there is an equal and opposite reaction. In the case of flying objects, the force of lift created by the wings or feathers is the action, and the reaction is the force of gravity. These two forces are essentially balanced, allowing the airplane or bird to maintain a stable flight.

**Achieving Equilibrium**

In order for an airplane or bird to achieve equilibrium in flight, the force of lift must be equal to and opposite in direction to the force of gravity. This balance is crucial for staying airborne. If the force of lift becomes smaller than the force of gravity, the object will descend, while if lift becomes greater than gravity, the object will ascend.

**Aircraft Design and Control**

Airplane design plays a significant role in flight. Engineers carefully design the shape and size of the wings to optimize lift generation. Additionally, the control surfaces, such as ailerons and elevators, allow pilots to manipulate the lift and control the aircraft's altitude and direction. By adjusting these control surfaces, pilots can change the lift force to counteract gravity and maintain flight.

**Conclusion**

In conclusion, flying objects like airplanes and birds are able to defy gravity by utilizing the force of lift. Through the shape and motion of their wings, they generate lift that counteracts the pull of gravity. This equilibrium between lift and gravity allows them to maintain stable flight and soar through the skies.
Community Answer
why does gravity don't acts on a flying airplane or bird
Gravity acts on flying airplane and bird, but it is reduced because of their streamlined shape (broader in the middle and tapering at both ends). Also, gravity is not enough to oppose the force applied by the airplane or bird. In other sense, their equilibrium is dynamic, i.e., no external force is capable of influencing their activity, and they are in uniform motion.
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