the coefficient of static friction between two surfaces depends upon
Friction For surfaces at rest relative to each other   μ = μ  s    {\displaystyle \mu =\mu _{\mathrm {s} }\,} , where   μ  s    {\displaystyle \mu _{\mathrm {s} }\,}  is the coefficient of static friction. This is usually larger than its kinetic counterpart. The coefficient of static friction exhibited by a pair of contacting surfaces depends upon the combined effects of material deformation characteristics and surface roughness, both of which have their origins in the chemical bonding between atoms in each of the bulk materials and between the material surfaces and any adsorbed material. The fractality of surfaces, a parameter describing the scaling behavior of surface asperities, is known to play an important role in determining the magnitude of the static friction.[1]
Surface Pro 2 The Surface Pro 2 is a Surface-series 2-in-1 detachable produced by Microsoft. Unveiled at an event in New York City on September 23, 2013 and released on October 22, 2013, it succeeds the Surface Pro released in February 2013. While maintaining a design similar to the original design of its predecessor, the Surface Pro 2 has improved hardware specifications compared to it, such as a next generation Haswell Intel Core processor and an increased number of storage options, improved versions of the kickstand and cover accessories.[6]