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Homework Help: The rocket

  1. Oct 21, 2004 #1
    The jet engine of an airplane takes in 100 kg of air per second, which is burned with 4.2 kg of fuel per second. The burned gases leave the plane at a speed of 550 m/s (relative to the plane). If the plane is traveling 270 m/s.

    (a) Determine the thrust due to ejected fuel.
    This is just 4.2*550

    (b) Determine the thrust due to accelerated air passing through the engine.

    (c) Determine the power (hp) delivered.
  2. jcsd
  3. Oct 21, 2004 #2


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    (b) The air comes in at 270 m/s and comes out at 550 m/s. You know the mass of the air, so you can calculate the thrust.
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