What is sliding friction?

friction is a force that resists the movement of one surface above the other. When one surface moves to the other, friction is "kinetic" - sliding friction. On the other hand, if the surfaces do not move - or are at rest - due to each other, friction is static. For static fiction, If the Total Applied Force On An Object is "f" and the resistive Force from Friction is "F," Then there there Sliding Friction, and the Mathematical Expression Becomes F = μ _{k × F, Where μ k is a coefficient of kinetic or sliding friction. This is due to the large scattering in phenomena that contribute to friction. These include surface interactions resulting from "adhesion", "plowing" and "adeformation of the sperity." Adhesion refers to a component of sliding friction, which results from the electrostatic attraction of atoms. The forces of adhesive nature between two surfaces can be weak - as in the case of the coated Teflon®or an oiled surface}

Two most intact surfaces have imperfections-a surface or hardness of the surface-called asperity. They can at least briefly connect them. There are two mechanisms that still allow such surfaces to move in relation to each other, experience sliding friction without stopping. One of them is a plastic deformation, and the obstruction is temporarily pushed aside. The other is plowing, which is a place where one surface contains plows from the imperfection of the other surface, as well as the plow of the farmer kicking dirt under his Blade, allowing movement.

As soon as the two surfaces overcome the power of static friction at rest, they are connected to the sliding friction. This remains the case as long as the surfaces are in contact and the strength remains large enough to continue in action. For most of the real world applications, the strength of static friction is more than the strength of the static friction just before moving. BHowever, YLO found that if surface imperfections are carefully minimized, the level of force to start sliding friction should be achieved approximately as the level that is needed to maintain it.

There are other forces at work that can be considered resembling sliding friction in some senses. For example, the magnetic field is able to produce what can be considered a kind of "friction" in Dynamo. The result is a small magnetic braking component. This is usually categorized as a "magnetic damping" rather than as a sliding friction.