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(B) The coefficient of static friction,denoted by $\mu_s$,is a dimensionless constant that characterizes the interaction between two surfaces in conta

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It depends on the nature of the materials and the roughness of the surfaces in contact.

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(B) The coefficient of static friction,denoted by $\mu_s$,is a dimensionless constant that characterizes the interaction between two surfaces in contact. It is determined by the nature of the materials (e.g.,wood on wood,rubber on concrete) and the degree of roughness or smoothness of the surfaces. Since $\mu_s$ is independent of the normal force $(N)$ and the apparent area of contact,it is strictly a property of the materials and their surface conditions. Therefore,it is considered a material-specific property rather than a variable dependent on external forces or motion.

Why is the coefficient of static friction considered a property of the surfaces in contact?

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