Question

A jet engine works on the principle of

• A. Conservation of energy
• B. Conservation of momentum
• C. Conservation of mass
• D. Conservation of temperature

Answer 1

The correct option is B Conservation of momentum

A jet engine works on the principle of conservation of linear momentum.

In jet engines, a large volume of gases produced by the combustion of fuel is allowed to escape through a jet in the backward direction. Due to the very high speed or velocity, the backward rushing gases have a large momentum. They impart and equal and opposite momentum to the jet engine due to which the jet engine moves forward with a great speed.