A light blue arrow labeled Drag appears at the tail and pulls the airplane backward. On-screen text reads, “Drag is an aerodynamic force that acts against the movement of an aircraft.” A second blue arrow labeled Thrust appears at the nose of the airplane and pulls it forward. On-screen text reads, “Thrust is the force that moves an aircraft through the air.” The arrows and on-screen text disappear.
A light blue arrow labeled Gravity appears below the airplane and pulls the airplane downward. On-screen text reads, “The weight of the plane is a force caused by the earth’s gravity.” A second blue arrow labeled Lift appears above the airplane and pulls it upward. On-screen text reads, “The wing of a plane creates a downward force on the air, which in turn creates an upward force on the wing. This is called lift.”