A jet engine works on the principle of: i. Conservation of linear momentum ii. Conservation of kinetic energy iii. Conservation of angular momentum iv. Conservation of inertia Explain.

A jet engine works on the principle of conservation of?

1. Linear momentum
2. Angular momentum
3. Energy
4. Mass

The correct option is i. Linear momentum

Explanation:

The conservation of linear momentum states that the body in motion will retain its total momentum unless an external force is applied to it. The mathematical form is:

Initial momentum = Final momentum

P_i = P_f

In a jet engine, a large volume of gas is produced through the combustion of fuel which gets escaped from the back side of the jet. A large momentum is gained by this gas since it has a high velocity. Therefore, there is an equal and opposite momentum. Thus, the jet moves in the forward direction with high speed.