An airplane of mass 1.50 3 104 kg is in level flight, initiallymoving at 60.0 m/s. The
Chapter 8, Problem 74(choose chapter or problem)
An airplane of mass 1.50 3 104 kg is in level flight, initiallymoving at 60.0 m/s. The resistive force exertedby air on the airplane has a magnitude of 4.0 3 104 N.By Newtons third law, if the engines exert a force onthe exhaust gases to expel them out of the back of theengine, the exhaust gases exert a force on the enginesin the direction of the airplanes travel. This force iscalled thrust, and the value of the thrust in this situationis 7.50 3 104 N. (a) Is the work done by the exhaustgases on the airplane during some time interval equalto the change in the airplanes kinetic energy? Explain.(b) Find the speed of the airplane after it has traveled5.0 3 102 m.
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