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Homework Help: Help with a solution

  1. Apr 18, 2006 #1
    I need help finding the solution to this problem...

    Suppose that the waterf exerts an average frictional drag of 1.0 X 10^5 N on a nuclear-powered ship. How far can the ship travel per kilogram of fuel if the fuel consists of enriched uranium containing 1.7% of the fissionable isotope 235U and the ship's engine has an efficieny of 20% (assume 208 MeV is released per fission event.)

    I know the answer is 2.9 X 10^3 km (1800 miles) I just don't know how to get to it.
  2. jcsd
  3. Apr 18, 2006 #2


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    Staff Emeritus
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    One is suppose to show one's work before asking for assistance.

    HINT: Thik about the definition of work done.

  4. Apr 18, 2006 #3
    i figured it out
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