The 4 Forces of Flight

Lift,Drag,Thrust,Weight

Lift

Lift is the force which pushes the plane up.

Lift is made by the airfoil shape of the wing.

Weight

Weight is the force of gravity, it pulls the plane towards the ground.
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Thrust

Thrust is the force made by the engines, that push the plane.

Drag

Drag is the force that pulls the plane backward, it is made by the friction of the plane with the air
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