Friction

[Dan Squire]

     Don wrote:

>     Also, the reduced contact area between the knuckle and the rep.
>     lever/jack top caused by the smaller knuckle will reduce the knuckle
>     to whippen friction.

This notion that friction is related to the contact surface
area is a common mistake.
Friction is independent of the contact surface area.

Dan Squire
U of H