The four forces of flight are the main reason why planes fly and how they are able to glide through the air majestically. Each force of flight helps to guide the airplane to its destination by helping it withstand gravity and pressure. Lift is one of the four forces, lift is an upward force that is created by the movement of air above and below an airplane wing. Lift helps balance out the weight of the plane for it to be able to withstand gravity. Lift's air flows faster above the wing and slower below the wing, which creates a difference in pressure that keeps the airplane flying. A second force is weight, which is pressure or gravity that pulls the airplane back to earth. Weight helps the plane control itself, such as going up or going down
