Then, by the principle of Archimedes, W = Vwo; or wo = W/V.
For the body alone the resultant of the components of momentum W V -cos andW V sin 0 is W V -sec. lb, acting along 00', and so is unaltered.
Equating the muzzle-energy and the work in foot-tons (2) E= w V 2 _XM.E.P.
