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Homework Help: Rocket Propulsion Gas Injection

  1. Apr 4, 2009 #1
    Please help, book gives no examples relatively close to this.

    A rocket is fired in deep space, where gravity is negligible.

    If the rocket has an initial mass of 6000 kg and ejects gas at a relative velocity of magnitude 2000 m/s , how much gas must it eject in the first second to have an initial acceleration of 25.0 m/s^2?
  2. jcsd
  3. Apr 4, 2009 #2


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    Homework Helper

    Welcome to PF!

    Hi ada0289! Welcome to PF! :smile:
    Hint: use conservation of momentum :wink:

    What do you get? :smile:
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