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    Re: Navigating Around Hills and Dips in the Ocean
    From: Jared Sherman
    Date: 2003 Aug 16, 22:29 -0400

    Michael-
     
    Yes, in that the "potential energy" stored in the traveler increases as it 
    climbs and decreases as it comes back down.
    
    No, in that it takes energy consumption to RAISE the traveler UP the hill, and 
    that energy is simply lost as the traveler comes back down to the lower 
    energy potential at the end of the trip.
    
    That's why walking UP a mountain is so much harder and slower than simply 
    walking in a straight line. The "coming down" part never compensates for the 
    energy spent going up, in practical terms.
    
    
    

       
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