The forces acting on the 28,000 lb airplane are the thrust T and drag D. which are paralle...

The forces acting on the 28,000 lb airplane are the thrust T and drag D. which are parallel to the airplane’s path; the lift L, which is perpendicular to the path; and the weight W The airplane climbs from an altitude of 3000 ft to an altitude of 10,000 ft. During the climb, the magnitude of its velocity decreases from 800 ft/s to 600 ft/s.

(a) What work is done on the airplane by its lift during the climb?

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(b) What work is done by the thrust and drag combined?