Force may be thought of as a push or pull in a specific direction.
Weight is a force that is always directed towards the center of the earth.
Thrust is the force provided by the engines and moves an airplane through the air. Drag is the resistance force provided by the air as the airplane moves through the air. Several components work together to produce aircraft lift, most of which is generated by the wings of the plane. Netforce is lift minus the weight of the plane. Alter the altitude of the given airfoil.