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    How do the forces in the a jet engine work?
    I don't understand how the jet engine exerts a force?
    And how the jet engine's force causes the exhaust gases to accelerate backwards?

    A turbofan jet engine (the type used in most modern airliners) uses a fan to suck the cold atmospheric air into the engine. Behind that fan, a compressor increases the air pressure, and the aircraft's fuel is injected into the combustion chamber. Here, the fuel mixes with the highly pressurised air, burning to give off hot exhaust gases, which rush through turbine blades (these are connected to the main fan and compressor). A tapered exhaust 'chute' accelerates the exhaust gases, and since these are now travelling faster than the plane, following Newton's Third Law (for every action, there is an equal and opposite reaction), the plane is moved forwards.

    Hope that answers your questions!

    At a basic level, it works due to Newton's 3rd Law. The force of the exhaust gases pushing out of the rear of the engine generates thrust that propels the aircraft forward. For more detail, see here:

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