The 4 Forces of Flight

By Paige Paquin

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1. Lift

Lift is the force that holds an airplane in the air. With airplanes, the wings create most of the lift, that the plane itself uses. It is a partial vacuum created above the airplane's wing, causing the wing to be lifted upward.
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2. Weight

Weight is the force caused by gravity. For instance, its weight is equal to a portion of the lift force and to a portion of the thrust force.
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3. Thrust

Thrust is the force that moves an aircraft in the direction of the motion. It is created by a propeller, jet engine, or rocket. Air is pulled in and then pushed out in opposite direction.
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4. Drag

Drag is the force that acs opposite to the direction of motion. It tends to slow an object. Drag is caused by friction and difference in air pressure.
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