10-25notes
October 25, 2010
FRICTION DEPENDS ON...
1. The two surfaces involved?
YES!!!
2. The weight of the object?
Sort of... Really it's the Normal
Force that keeps the two surfaces in
contact.
3. Surface area?
No!!
10-25notes
October 25, 2010
1. The two surfaces involved?
surface
bumpiness
causes
friction)
And so do intermolecular
forces on a microscopic
level
10-25notes
October 25, 2010
2. The weight of the object?
10-25notes
October 25, 2010
3. Surface area?
more surface area
in contact
more pressure on the
surface area
RESULT: SAME FRICTION!!
10-25notes
October 25, 2010
AN EQUATION FOR FRICTION
FRICTION =
FACTOR THAT
REPRESENTS
X
THE SURFACES
NORMAL
FORCE