To compare the results of this very general graphical method with those given by analysis, as expressed by [Equations (7)] and [(8)], let
be taken vertical or coinciding with
, regard the thrust on
as horizontal, and neglect any cohesion on the vertical planes,
, etc. Then it is found, for the given constants, that the graphical method gives exactly the thrust (560 lb.) obtained from [Equation (7)]. This result was foreseen.
It is likewise interesting to know, if the thrust on