Question

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

Answer 1

44.28MJ

Step-by-step 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