No, the coefficient of kinetic friction (μk) or sliding friction is generally lower than or equal to the coefficient of static friction (μs). The coefficient of friction is a dimensionless quantity that represents the ratio of the force of friction between two surfaces to the force pressing them together.
The coefficient of static friction is the maximum value of friction that must be overcome to set an object in motion, whereas the coefficient of kinetic friction is the value of friction when the object is already in motion. The static friction coefficient is typically higher because it accounts for the additional force required to overcome the initial resistance and initiate motion.
In most cases, once an object is set in motion, the coefficient of kinetic friction comes into play, and it is generally lower than the coefficient of static friction. This is due to various factors, such as surface roughness, adhesion, and the formation of a lubricating layer between the surfaces in motion.
However, it's important to note that the coefficients of friction depend on the specific materials and surface conditions involved. In rare cases, there may be situations where the coefficient of kinetic friction exceeds the coefficient of static friction, but such cases are highly unusual and not representative of the general behavior of friction.