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[Roy Morgan <k1lky AT earthlink.net>]

On May 18, 2008, at 5:05 PM, Lynda wrote:

> O.K., all you mechanically/electrical engineering type/inclined  
> folks.  How
> come they can't use the wheels of a vehicle to generate electricity to
> replace the electricity used?

No doubt later messages have explained, but:

You can't get something for nothing.

You CAN put energy back into the system while you are braking, and at  
least some rail motors do this.  It works because:
-there is enough money to make it work,
-and there are a LOT of cars on the same electric line at the same  
time to use the electricity put back in.

Roy



Roy Morgan
k1lky AT earthlink.net
Lovettsville, VA 20180