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Infinite mass

  1. Jul 12, 2010 #1
    when approaching C the mass of your craft increases. If the mass of your fuel increases also wouldnt that mean the faster you go the more fuel youll have?
  2. jcsd
  3. Jul 12, 2010 #2

    Observers inside the spacecraft will not observe any relativistic mass increase of the craft or its fuel.
  4. Jul 12, 2010 #3


    Staff: Mentor

    No, relativistic mass is the same as total energy. Since some of the fuel's total energy goes into the exhaust the total energy of the fuel must decrease, not increase.
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