Why higher exhaust velocity results in higher thrust of rocket motor?

Question

According to Bernoulli principle the faster gas moves, the
lower is its pressure acting on the surface of rocket nozzle.
The force of thrust is equal to pressure x nozzle area.

Answer 1

Pressure has nothing to do with this.

Conservation of momentum does.

You're throwing the same mass of gas backward, so the momentum you gain is directly proportional to the velocity of exhaust.

Answer 2

Bernoulli's principle is a secondary effect and is orthogonal to the direction of flow. The pressure that matters here is the pressure inside the combustion chamber that pushes the exhaust out. The nozzle is mainly there to assure an efficient flow. If you want to consider the exhaust velocity, do so in terms of conservation of momentum - the rearward momentum imparted to the exhaust must be balanced by the increase in the forward momentum of the rocket.

Answer 3

this question and the suited answer are decrease than attack by NASA and all the government/Media/tutorial liars. of direction rocket thrust pushes against the ambience to bypass, in basic terms as vehicle wheels push against the floor, boat propellers push against the water, helicopter rotors push against the ambience, jet engines push against the ambience and so do rocket engines create THRUST to push against the ambience. don't be fooled by NASA's magical rockets which they declare do no longer prefer an environment for the thrust to have interplay with. once you're nevertheless fooled by the Moon walk lies then you've an excellent style of becoming as much as do.

Answer 4

To get up to that velocity, you had to exert a force on the gas. That reaction force propels you forward. You are overthinking the problem. Remember, Bernoulli's principle is a consequence of energy conservation, and assumes that no work is being done on the fluid--probably not the case here.

Answer 5

mv = MV so the higher the exhaust velocity (v) the more thrust momentum transferred to the rocket.

Doug

Answer 6

The higher the ejection speed, the more thrust. ~