The four forces of flight are lift, drag, thrust, and weight. They all work together to help an airplane fly. Lift is when the air temperature and pressure differs on different sides of the wing. That causes the plane to lift into the air and fly! The force pulling the plane backwards is called drag. We need to overcome this force to help the plane fly. That is why we have thrust. Thrust is when the airplane gets pushed forward by either a jet engine or a propeller. Weight is the force that is pulling the plane down to to the ground. This force helps a plane land on the runway. These are the four forces of flight.
