> depending on tire pressure (etc.) I'd guess that it takes somewhere > between 100-200 lb of force (is that the right term?) to start a
Almost :-) The actual physical unit of force is the Newton [N=kg m/s^2], which is the force needed to accelerate an object of 1kg with 1 m/s^2, i.e.: The object's velocity changes by 1 m/s if you apply 1 Newton for 1 second. In practice, humans feel the _weight_ of objects as a force which is the product of its mass (lb or kg) and gravity (~9.81 m/s^2). Because gravity is, by and large, constant on our planet, this force and the mass are proportional. Hence one often uses mass (lb) to denote forces. The force corresponding to your 100-200lb would be about 500-1000N. The exact value varies from the poles to the equator :-) -Gerhard -- | voice: +43 (0)662 642934 *** web: http://www.cosy.sbg.ac.at/~gwesp/ | | If emailing to [EMAIL PROTECTED] doesn't work, please try [EMAIL PROTECTED] _______________________________________________ Flightgear-devel mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-devel
