The basic physics is valid and the other loses are not particularly
relevant.
When the tire climbs onto a tile (or uncompressed portion of roadway),
work is done to combat gravity. That work comes from the car's motor.
When the tile descends (or roadway compresses) energy is produced, this
time coming from gravity. Only this time, the energy doesn't go back
into the car's motor. It goes into the piezo and then becomes electrical
energy.
So, yes, to produce piezo energy, it will come from the car. Again, the
principal question is whether the piezo roadbed will have <= the
"squishiness" of a traditional roadbed.
Peri
------ Original Message ------
From: "via EV" <ev@lists.evdl.org>
To: "Rush Dougherty" <r...@ironandwood.org>
Cc: "Electric Vehicle Discussion List" <ev@lists.evdl.org>
Sent: 27-Aug-16 2:47:12 AM
Subject: Re: [EVDL] Piezo-power> 10mi of freeway could charge all the
EVs in Burbank-CA(?)
Force = mass * acceleration due to gravity
Work = force * distance
So the work required to raise and object a specified distance is the
same amount of work retrieved when that object is returned to its
original location. If the object remains in the raised position, it
contains potential energy.
Potential losses might be due to wind resistance, friction, rolling
resistance etc. But the losses are not due to gravity. And, as Cor
implied, these external losses are what prevent perpetual motion.
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