Jet propulsion?is the?propulsion?of an object in one direction, produced by ejecting a?Jet?of?FLUID in the opposite direction. By?Newtons Third Law, the moving body is propelled in the opposite direction to the jet.?Reaction engines ?operating on the principle of jet propulsion include the?Jet engine ?used for?, aircraft propulsion pump-jet??used for?marine propulsion, and the?rocket engine?and?plasma thruster?used for?spacecraft propulsion. Biological systems include the propulsion mechanisms of certain?marine animals?such as?cephalopods,?sea hares,?arthropods, and?fish.
