Image »Kinetic (Sliding) Friction on an Inclined Plane« download
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Kinetic friction force \( \boldsymbol{F}_{\text k} \) acts when two surfaces slide past each other. It results from the friction between the two surfaces and depends on the material properties as well as the normal force. The kinetic friction force acts against the direction of motion and influences the speed and equilibrium of a moving object.
The sliding friction force is proportional to the normal force \( \boldsymbol{F}_{\text N} \), where the proportionality constant is the kinetic friction coefficient \( \class{blue}{\mu_{\text k}} \).
