Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Relativistic velocity addition law derived from a machine gun analogy
  and time dilation only   We consider a scenario that involves a machine gun, the bullets it fires and
a moving target, considered from the rest frame of the machine gun and from the
rest frame of the target respectively. Involving the special relativity via its
two postulates and the time dilation formula we derive the relativistic
velocity addition law showing that it leads to the Lorentz transformations for
the space-time coordinates of the same event.

27
The categories of this paper are: comp-gas
18
The categories of this paper are: econ
24
The categories of this paper are: dg-ga
13
The categories of this paper are: quant-ph
11
The categories of this paper are: hep-lat
35
The categories of this paper are: mtrl-th
9
The categories of this paper are: nlin
8
The categories of this paper are: hep-ex
2
The categories of this paper are: math
5
The categories of this paper are: gr-qc
6
The categories of this paper are: astro-ph
4
The categories of this paper are: cond-mat
20
The categories of this paper are: acc-phys
31
The categories of this paper are: ao-sci
14
The categories of this paper are: math-ph
37
The categories of this paper are: supr-con