Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Dependence of kinetic friction on velocity: Master equation approach   We investigate the velocity dependence of kinetic friction with a model which
makes minimal assumptions on the actual mechanism of friction so that it can be
applied at many scales provided the system involves multi-contact friction.
Using a recently developed master equation approach we investigate the
influence of two concurrent processes. First, at a nonzero temperature thermal
fluctuations allow an activated breaking of contacts which are still below the
threshold. As a result, the friction force monotonically increases with
velocity. Second, the aging of contacts leads to a decrease of the friction
force with velocity. Aging effects include two aspects: the delay in contact
formation and aging of a contact itself, i.e., the change of its
characteristics with the duration of stationary contact. All these processes
are considered simultaneously with the master equation approach, giving a
complete dependence of the kinetic friction force on the driving velocity and
system temperature, provided the interface parameters are known.

33
The categories of this paper are: plasm-ph
7
The categories of this paper are: hep-th
12
The categories of this paper are: nucl-th
5
The categories of this paper are: gr-qc
36
The categories of this paper are: cmp-lg
2
The categories of this paper are: math
30
The categories of this paper are: q-alg
26
The categories of this paper are: bayes-an
6
The categories of this paper are: astro-ph
23
The categories of this paper are: solv-int
1
The categories of this paper are: cs
37
The categories of this paper are: supr-con
34
The categories of this paper are: chem-ph
9
The categories of this paper are: nlin
32
The categories of this paper are: atom-ph
18
The categories of this paper are: econ