Which of the following statements about the force of static friction between two surfaces is false?
a. It takes on any value between zero and the maximum possible force of static friction, fs,max = μs N.
b. It depends on the area of contact between the surfaces.
c. It is only present between two surfaces that aren’t moving with respect to each other.
d. It is parallel to the surface of contact, and in the direction that opposes relative motion.