Fill ups:
Describe rocket propulsion.
The propulsion of rockets is based on the and
The action and reaction forces are alwaysin magnitude andin direction.
The linear momentum of a system remainsas long asacts on it.
When fuel burns inside the rocket, hot gases are ejected atthrough the nozzle, producing a.
As the rocket’s mass continuouslyduring flight and no net external force acts on the system, its velocity progressivelyuntil it can even reach escape velocity.
To achieve very high speeds such as orbital or escape velocity, the rocket’s mass other than fuel must be asas possible.