what is sliding friction class 8

Sliding friction is a type of friction that occurs when two objects slide against each other. It is also known as kinetic friction and is defined as the force that is needed to keep a surface sliding along another surface. The force that acts in the opposite direction where a body wants to slide is called sliding friction. Sliding friction depends on two variables: the material or the thing and the weight and size of the object. Any variation in the surface area in contact does not change the sliding friction. In most materials, sliding friction is much less than static friction. Some examples of sliding friction include sliding of the block across the floor, two cards sliding against each other in a deck, and rubbing both hands together to create heat. The factors affecting sliding friction include the surface deformation of objects, the roughness or smoothness of the surface of the objects, and the original speed of either object.