A jet engine exerts a force on the air by expelling it backward. This system is an excellent demonstration of Newton's third law of motion. Imagine an average commercial jet engine has a thrust of 200 kN and the mass flow rate of air through the engine is 100 kg/s. Assuming steady-state operation, calculate the velocity of the exhaust gases exiting the engine.
Using the principle of conservation of momentum, determine the exit velocity of the exhaust gases if the thrust produced by the engine is associated solely with this momentum flux.