An airplane (mass 1865 kg) starts out sitting on a runway at sea level, at rest. It then climbs to a cruising altitude of 2420 meters and a constant cruising speed of 96.5 m/s. Assuming no force from air resistance, what work did the engine have to do in order to let the plane reach that height and that speed

Question

Jack Russo

Physics

23 June, 17:21

An airplane (mass 1865 kg) starts out sitting on a runway at sea level, at rest. It then climbs to a cruising altitude of 2420 meters and a constant cruising speed of 96.5 m/s. Assuming no force from air resistance, what work did the engine have to do in order to let the plane reach that height and that speed

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Answers (1)

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Areli Kelly · Answer 1

44.28MJ

Explanation:

Work is said to be done if the force acting on an object causes the object to move through a distance.

Work done = Force * distance

Given mass of airplane = 1865kg

Force = mg = 1865*9.81

Force = 18295.65N

Distance covered = 2420metres.

Work done by the engine = 18295.65*2420

Work done by the engine = 44,275,473Joules

= 44.28MJ