Sliding friction is when two objects are rubbing against each other. Putting a book flat on a desk and moving it around is an example of sliding friction. Factors affecting sliding friction include weight and surface roughness. However surface area does not affect affect sliding friction. It has been suggested that Frictional force be merged into this article or section. ...
Friction, force that opposes the motion of an object when the object is in contact with another object or surface.
Friction depends on this force because increasing the amount of force increases the amount of contact that the object has with the surface at the microscopic level.
In this equation, F is the force of friction, ยต is the coefficient of friction between the object and the surface, and N is the normal force.
With a sudden change in sliding velocity, the coefficient of slidingfriction exhibits an instantaneous change (an increase for an increase in velocity, and a decrease for a decrease in velocity).
Frictional velocity dependence is the change in steady-state slidingfriction coefficient with a change in sliding velocity.
This work is motivated by: (1) a lack of laboratory friction data for materials that accurately represent natural faults, and (2) the need to understand the effect of factors such as compaction state, the presence of clays, changes in clay mineralogy, and normal stress on frictional behavior.
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