Very nice!!
Peter
Brian Ellis
<b_ellis@PROTO To: [log in to unmask]
NIQUE.COM> cc: (bcc: DUNCAN Peter/Asst Prin Engr/ST
Sent by: Aero/ST Group)
TechNet Subject: Re: [TN] Question for the physics
<[log in to unmask] "gurus"
RG>
10/11/01 02:07
PM
Please respond
to "TechNet
E-Mail Forum."
Ken
I'm damned sure that the black orange box may fall with an acceleration
of 1 g, up to when air resistance starts to slow it down, but if it
lands on a concrete road, it will decelerate at a very high value of g,
depending on the give in the concrete and the box itself. It's all a
matter of kinetic energy which is dissipated quasi-instantaneously. The
g-value would be lower if it landed on somebody's head, because the
latter being squashed down to the mid-torso would allow the acquired
energy from the free fall to be better dissipated. No mental energy
would be dissipated in such a case as the skull contents would be heated
to dissociation of the grey matter molecules into other carbon and
hydrogen combinations.
Brian
Ken Patel wrote:
>
> All,
> If G force is the gravitation force acting on the object then why many
times an object is
> being designed to take so may G forces. What I have heard that voice
recorder of the plane
> that went down in Pennsylvania can take on 700G force! So, if the free
fall is 1 G then why
> design 700 times safer. So, height above the ground does matter. May be I
got to take a look
> at the physic's book unless someone explain in layman's term.
>
> re,
> Ken Patel
>
> Timothy Reeves wrote:
>
> > No Jason,
> > I am not a guru, but that's OK. They are not interconvertible. One is a
> > measure of force, the other acceleration (actually a dimensionless
> > multiplier of the standard gravitational acceleration, g, 9.8 m/s^2).
If you
> > have an object in mind of a known mass, you could find the force
exerted on
> > it given the acceleration ("G's") by F = m a.
> >
> > Example: 100 gram object subjected to 5 G's ---------> F = 0.1 kg * 5 *
9.8
> > m/s^2 = 4.9 Newtons or 0.5 kilogram force or 1.1 lb-force.
> >
> > Tim Reeves
> >
> > -----Original Message-----
> > From: Jason Gregory [mailto:[log in to unmask]]
> > Sent: Tuesday, October 09, 2001 9:01 AM
> > Subject: Question for the physics "gurus"
> >
> > How do you convert pound/kilogram to G-force? Is this convertable?
Since
> > G-force is somewhat time derived and pound/kilogram is force derived?
> > Any help is appreciated.
> >
> > Jason Gregory
> > Software Specialist - NPI Group
> > SCI Systems/Plant 2
> > 13000 S. Memorial Pkwy.
> > Huntsville, AL. 35803
> > (256) 882-4107 x3728
> > [log in to unmask]
> >
> >
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