Question

A jet aircraft is traveling at 243 m/s in horizontal flight. The engine takes in air at a rate of 81.1 kg/s and burns fuel at a rate of 2.15 kg/s. The exhaust gases are ejected at 635 m/s relative to the aircraft. What is the kinetic energy of the aircraft?

A) 7.94 x 10^6 J
B) 1.48 x 10^7 J
C) 3.73 x 10^6 J
D) 8.17 x 10^7 J

Answer 1

The calculation of the aircraft's kinetic energy requires its mass, which is not provided in the question. Therefore, we cannot calculate the kinetic energy or select the correct option.

Step-by-step explanation:

The question relates to the calculation of the kinetic energy of an aircraft. To find the kinetic energy of the jet aircraft, we use the formula for kinetic energy, KE = ½ * m * v2, where 'm' is the mass of the aircraft and 'v' is the velocity of the aircraft.

However, we are not given the mass of the aircraft in the question, so we cannot calculate its kinetic energy directly. Instead, we are provided with details related to the engine's intake rate and exhaust velocity, which are not relevant for the kinetic energy calculation without the mass of the aircraft.

Due to the missing essential information (the mass of the aircraft), we are unable to provide the correct option among the choices given (A, B, C, D) for the kinetic energy of the aircraft.