On Wed, 28 May 2003, Randall Clague wrote:
> BTW, the allowable kinetic energy for a fragment is 11 ft-lbs. I
> haven't converted that into joules, because I don't know how. To me,
> a foot-pound is a unit of torque. Anyone want to take a shot at it?
Easy, it's the same story, just rotated ninety degrees.
Really. :-)
A foot-pound of torque is a pound of force applied at a radius of a foot
(that is, the force is at right angles to the distance).
A foot-pound of energy is a pound of force applied over a distance of a
foot (that is, the force is in line with the distance).
A foot-pound -- formally, a foot pound-force -- is 1.355818 joules.
(Double check: it's about 5N over a distance of about 0.3m => ~~1.5 J.)
Henry Spencer
[EMAIL PROTECTED]
_______________________________________________
ERPS-list mailing list
[EMAIL PROTECTED]
http://lists.erps.org/mailman/listinfo/erps-list
