An airplane of mass 1.60 ✕ 104 kg is moving at 66.0 m/s. the pilot then increases the engine's thrust to 7.70 ✕ 104 n. the resistive force exerted by air on the airplane has a magnitude of 5.00 ✕ 104 n. (a) is the work done by the engine on the airplane equal to the change of the airplane's kinetic energy after it travels through some distance through the air? yes no correct: your answer is correct. is the mechanical energy conserved? explain your answer. energy is not conserved because there is friction. (b) find the speed of the airplane after it has traveled 5.00 ✕ 102 m. assume that the airplane is in level flight throughout the motion.
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