Yigit Turgut wrote:
> If you assume the start point is at sea level then you
> should be right with your numbers 4 - 5 km's.

OK, let's take this at face value.  Let's say the car weighed about 1 ton,
which is light for a car.  That's 2000 pounds, or about 9000 Newtons.  If
you take a 9000N car on a trip and it ends up 5000m higher at the end, 45MJ
had to have been expended somewhere somehow.  This has nothing to do with
how curvey or not the path was, how long it took, or what exactly propelled
the car.  This is simply looking at resulting potential energy alone.

Now let's look at a car battery.  Let's be generous and say it is rated for
100 A-h, which means it can put out 100A at 12V for 3600 seconds.  That's
4.3MJ, or less than 1/10 of the absolute minimum it would take to move the
car up 5000m.  4 such batteries simply can't do that, and that's assuming
the entire energy of the battery can be converted to potential energy of th=
e
car.  In reality there will be wind resistance (you said average speed was
about 80km/h =3D 50 miles/h, so wind resistance is a factor), other sources=
 of
friction, and of course inefficiency in converting the battery energy to
motion.

Clearly something is wrong somewhere.

--=20
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