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Why Do Airplanes Fly?

Why Do Airplanes Fly?

Written by: Sergio Suárez Benítez
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 Understanding How Airplanes Fly

The Four Fundamental Forces

When an aircraft is flying straight and level, it is subject to four primary forces: lift, gravity, thrust, and drag.

These forces interact to maintain equilibrium: Lift counters gravity, while thrust counters drag.
  • Thrust: This force propels the airplane forward through the air and is generated by a propeller or jet engine.
  • Drag: The resistance of air that acts to slow the airplane's forward motion.
  • Gravity: The natural force that pulls all objects toward the Earth.
  • Lift: An upward force generated by the airflow above and below the wings. Air moves faster over the wing's upper surface and slower beneath it, creating a pressure difference that enables the airplane to remain airborne.
Sergio Suárez Benítez Physics Science
Episodes
  • Why Do Airplanes Fly?

    Why Do Airplanes Fly?
    May 4 2024
    How Wings Generate Lift?

    The design of airplane wings is engineered to accelerate air flow over the wing's surface. As air speeds up, its pressure decreases.

    Consequently, the pressure above the wing becomes lower than the pressure below the wing.

    This difference in pressure generates an upward force on the wing, which lifts the airplane into the air.
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    3 mins
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