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Science & Alternative Science / Re: Do rockets push off the air?
« on: December 07, 2023, 08:23:02 PM »
You put some rocket fuel inside a rocket and ignite the fuel to release a quantity of energy. The fuel is transformed from a solid (or liquid) to a very hot expanding gas. The gas is confined inside the rocket ignition chamber with only one way out. Pressure builds up and the very hot gas exits thru the engine’s nozzle that helps to accelerate the gas. The hot exiting gas’s mass will be equal to the mass of the fuel that was burned. Now you have the mass(M) in the equation. The hot gas exiting the rocket engine is traveling at a high speed so, since it was almost zero velocity at the start, has accelerated greatly while traveling through the nozzle. Now you have the (A) acceleration part. Since the force is equal to the mass times the acceleration, you have a force opposite the direction of the rockets exiting gas. There’s no air mentioned in the equation anywhere. All that is needed is an accelerating mass.
If anything, the surrounding air will only slow the rocket’s acceleration. Any force produced by the air pushing the rocket up will be balanced out by the force of the air pushing back on the nose of the rocket. If the surface of the earth was a vacuum the acceleration of the rocket would be greater, all things being equal.
If anything, the surrounding air will only slow the rocket’s acceleration. Any force produced by the air pushing the rocket up will be balanced out by the force of the air pushing back on the nose of the rocket. If the surface of the earth was a vacuum the acceleration of the rocket would be greater, all things being equal.