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didinyc
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Homework Statement
The major difference between a jet engine and a rocket engine is that a rocket carries its
own oxidizer, usually in the form of liquid oxygen (LOX). A jet takes in air from the
atmosphere as it moves, uses it to burn the fuel, and then ejects all the gases out the
back.
At a certain instant, a jet engine is moving 210 m/s. The engine takes in air at a rate of 74.2
kg/s, combines it with 3.20 kg/s of fuel, and ejects the products of combustion at constant
speed 502 m/s relative to the jet. Assuming 100% efficiency: find the numerical value of the
thrust of this engine.
HINT: For a rocket engine: Thrust rel= v(relative)* (dm/dt)
How must this expression be modified for a jet
engine?
The Attempt at a Solution
I tried to read the book to solve it but cannot start anything if i get an idea of how to start, I will try to solve it! Thanks for the help!