Doc, I believe the intuition you have described here is the reason that
DaVinci was also so amazed to discover that it wasn't true.

More surface area does not add any friction, as the constant force in
your example is distributed amongst that much more area. (in this case,
lessening it, the force, that is.)

Now, what hasn't been pointed out is that these rules (friction
correlating not to area, but simply to the force) only apply to non
deforming surfaces.

Surfaces that deform are another ballgame when contemplating friction.

Matthew Groves Springfield, MO

On Aug 6, 2012, at 4:07 PM, "John Holladay"
<docholladay0820@g...> wrote:

> If you have two objects of identical size and weight, then the one
> with greater surface contact has to have more friction, therefore
> meaning more resistance to sliding. It may be minute, but there would
> have to be some additional resistance.
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