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Four Forces That Keep Air To Airplanes

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Four Forces That Keep Air To Airplanes
Four forces keep an airplane in the sky. They are lift, weight, thrust and drag. Lift pushes the airplane up. The way air moves around the wings gives the airplane lift. The shape of the wings helps with lift, too. Weight is the force that pulls the airplane toward Earth. Airplanes are built so that their weight is spread from front to back. This keeps the airplane balanced. Thrust is the force that moves the airplane forward. Engines give thrust to airplanes. Sometimes an engine turns a propeller.
Sometimes it is a jet engine. It doesn't matter as long as air keeps going over the wings. Drag slows the airplane. You can feel drag when you walk against a strong wind. Airplanes are designed to let air pass around them with less drag. An

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