Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The physics of a walking robot   The physics of walking is explored, using a toy as a concrete example and a
'toy' model applied to it. Besides the Newton's second law, the problem is also
discussed from the thermodynamical perspective. Once the steady state (constant
velocity) is achieved, we show that the internal energy of the toy is
dissipated as heat in the surroundings.

8
The categories of this paper are: hep-ex
31
The categories of this paper are: ao-sci
14
The categories of this paper are: math-ph
6
The categories of this paper are: astro-ph
2
The categories of this paper are: math
30
The categories of this paper are: q-alg
0
The categories of this paper are: hep-ph
21
The categories of this paper are: adap-org
19
The categories of this paper are: eess
15
The categories of this paper are: nucl-ex
37
The categories of this paper are: supr-con
32
The categories of this paper are: atom-ph
20
The categories of this paper are: acc-phys
18
The categories of this paper are: econ
26
The categories of this paper are: bayes-an
33
The categories of this paper are: plasm-ph