SORU: cümleler sırasıyla okunduğunda anlam bütünlüğünü bozan cümleyi bulunuz
(I) Weight, lift, thrust, and drag are the four primary sources acting upon an airplane. (II) Since the 1950s, aircraft technology has developed at an amazing speed, making especially great advances in thrust. (III) Weight, which is the force caused by gravity, is also the force that offsets lift, which is the upward force on the plane, because it acts in the opposite direction. (IV) Thrust, which is provided by a propeller or a jet engine, or a combination of the two, is the force that pushes the airplane forward in the air. (V) The fourth force, drag, is created by the friction that the airplane produces when moving through the air.