An 80,000-kg airliner is flying at 900 km/h at a height of 8.00 km.What is its total energy (kinetic + potential)if the total was 0 when the airliner was at rest on the ground?

Question

Quizplus · Accepted Answer

The total energy of the airliner can be calculated as the sum of its kinetic and potential energy.

Kinetic energy = 1/2 * m * v^2 = 1/2 * 80000 kg * (250 m/s)^2 = 2,500,000,000 J

Potential energy = m * g * h = 80000 kg * 9.81 m/s^2 * 8000 m = 6,278,400,000 J

Total energy = Kinetic energy + Potential energy = 8,778,400,000 J

Converting J to MJ: 8,778,400,000 J = 8,778.4 MJ

Therefore, the best choice is C with a total energy of 8770 MJ.

An 80,000-Kg Airliner Is Flying at 900 Km/h at a Height