Not exactly. It is more like a property that expresses the RELATIONSHIP between two different materials. For example, wood on wood can have one coefficient of friction, wood on glass another, and wood on concrete yet another, so this isn't something that can be attributed to a single material (in this case wood).
With what material? Coefficient of friction is for two materials.
You need two different materials to determine the coefficient of friction. Without another material you cannot know what the coefficient of friction is.
-- The friction force changes, and is directly proportional to the normal force. -- The coefficient of friction doesn't change. It is the proportionality constant in the first statement.
The amount of friction force that acts upon a body of mass depends on two factors: the property of the object and the normal force acting on the body. "Coefficient of friction" refers to the property of the material; in other words, the higher the coefficient of friction, larger the friction force is. The force of friction can be represented by this equation: FF = µFN. µ in this case represents the coefficient of friction. It can best be described as the numerical value that equates to the property of the object we are dealing with. µ does not have units; this reinforces the idea that it is just a numerical value that represents how "rough" or "smooth" the surface of an object is. Simply, the coefficient of friction is a way to describe, symbolically and numerically, how hard it is to move an object along a surface that the object is in contact with.
As the coefficient of friction is not function of the area or not related to the area of the contact surface so the coefficient of friction remains constant on the increase of the contact area. The coefficient of friction depends upon the material of the friction surfaces only.
With what material? Coefficient of friction is for two materials.
You need two different materials to determine the coefficient of friction. Without another material you cannot know what the coefficient of friction is.
-- The friction force changes, and is directly proportional to the normal force. -- The coefficient of friction doesn't change. It is the proportionality constant in the first statement.
It depends on the material.
The amount of friction force that acts upon a body of mass depends on two factors: the property of the object and the normal force acting on the body. "Coefficient of friction" refers to the property of the material; in other words, the higher the coefficient of friction, larger the friction force is. The force of friction can be represented by this equation: FF = µFN. µ in this case represents the coefficient of friction. It can best be described as the numerical value that equates to the property of the object we are dealing with. µ does not have units; this reinforces the idea that it is just a numerical value that represents how "rough" or "smooth" the surface of an object is. Simply, the coefficient of friction is a way to describe, symbolically and numerically, how hard it is to move an object along a surface that the object is in contact with.
You need to know both material involved in the friction to find the coefficient
As the coefficient of friction is not function of the area or not related to the area of the contact surface so the coefficient of friction remains constant on the increase of the contact area. The coefficient of friction depends upon the material of the friction surfaces only.
As the coefficient of friction is not function of the area or not related to the area of the contact surface so the coefficient of friction remains constant on the increase of the contact area. The coefficient of friction depends upon the material of the friction surfaces only.
The ratio of resistance force to effort force is a mechanical advantage.
Wood, or any other material, could be used to introduce static friction to a system. The choice of material(s) depends on how much static friction the system requires. Each material has its unique coefficient of friction.
coefficient of friction
No: this is a common misconception Friction= Normal force* Coefficient of friction where Normal force= Mass* Acceleration due to gravity* Cos(angle of surface) and the coefficient of friction is an intrinsic property of the surface Therefore, only the mass of the object and the surface composition affect friction