Which of the following statements about friction is NOT correct?
-
A.
The force of kinetic friction is less than the force of static friction -
B.
The force of kinetic friction between two surfaces is independent of the areas in contact provided the normal reaction is unchanged -
C.
The force of rolling friction between two surfaces is less than the force of sliding friction -
D.
The angle of friction is the angle between the normal reaction and the force of friction -
E.
Friction may be reduced by lubriction