  The calculation of the energy required to raise a constituent block of the
Khufu pyramid and the knowledge of the mechanical energy that a worker in
charge of the lifting of the blocks can produce per working day allows an
estimate of the minimum number of workers. necessary for the establishment of a
base of the pyramid. It emerges that this number is limited to a maximum of
less than 2,000 workers over a working season, ie less than 200 present each
day simultaneously on the site. In addition, the calculation of the flow of
blocks leads to the ineluctable conclusion that the construction could only be
done in a massively parallel working mode, undermining the hypothesis very
often put forward of the use of ramps to convey the blocks to their final
destination.
