🚀 go-pugleaf

r norman wrote:
> On 28 Apr 2006 08:59:09 -0700, "neo" <AbheJet@gmail.com> wrote:
>
> >Suppose there is human statue of cement in standing position. We human
> >being can remain in standing position. But why can't this statue remain
> >standing even if it is exact like our body?
>
> Of course a human statue can stand.  There are many examples around
> the world!
>
> You probably mean "why can't a human statue not firmly attached
> stand?"  It can, statically.  However any small horizontal force, like
> the wind, will tend to topple it.  We react by contracting muscles to
> shift our balance for small forces and by moving the position of our
> feet for larger forces.  When the forces get strong enough, we fall
> over.  Statues have a very difficult time responding to outside
> disturbances so either their feet are firmly fixed to the ground or
> they fall over much more easily than we do.
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thats right
ut why dont you ask a structural  engineer ????  (:-)

theoretically a human statue can stans still for vertical forcess
the truble as you said is while
horisontal forces are added  fo rinstans a wind force.

the only demand that it will say stable fo rvertical forces is that

the resultant vertical force will fall at the 'grain of the base '
it is something like   1/6   the smallest width of the base  (in our
case foot )
depends on the geometry of the base )
 2 there is a big difference between a solid statue and a live  human
body
th ehuman body is not a solid block   it has its jionts that are
fastened by muscules
tendond' etc
so if the uman body is in movement or something acts on it horizontally

there is a super sophistcated nerval - muscle  authomatic device
in our brain that counter acts aginst fall
btw  there is a new two wheel vehecle  (i forgot its name )
who works on similar princlples authomatically by a computer controll.

the main basic trick of that  humand standing and walking is  by a
quick
change of the location of the center of gravity of ghe body

fo rinstance if you tend to fall say to the right side
your body  say withthe  hand streched quickly to the left side are
compensating
the unstable position .

anothe btw
 a bycicle riding  is as well of that 'family of mechanism'
ie a constant correction of position by the steering rod

ATB
Y.Porat
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