Find Solution to Ship Fuel Problem: 1.0 X 10^5 N Drag

[laydico]

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.

 

[Hootenanny]

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

HINT: Thik about the definition of work done.

Regards,
~H

 

[laydico]

i figured it out