The coefficient of static friction is a value that represents the amount of force needed to overcome the frictional force between two surfaces in order to keep them from moving relative to each other.
The coefficient of static friction is determined experimentally by measuring the maximum force needed to move an object along a surface before it starts to slide. The ratio of this force to the normal force between the two surfaces gives the coefficient of static friction.
The coefficient of static friction is affected by factors such as the nature of the surfaces in contact, the roughness of the surfaces, and the amount of force pressing the surfaces together.
Static friction is the force that prevents two surfaces from moving relative to each other, while kinetic friction is the force that opposes the movement of two surfaces that are already in motion. The coefficient of static friction is typically higher than the coefficient of kinetic friction.
The coefficient of static friction can be reduced by using lubricants, polishing or smoothing the surfaces in contact, or reducing the amount of force pressing the surfaces together. It can also be reduced by increasing the surface area in contact between the two surfaces.