1 The flow is steady and incompressible. 2 The plate is vertical and the jet is normal to plate. 3 The pressure
on both sides of the plate is atmospheric pressure (and thus its effect cancels out). 4 Fiction during motion is negligible. 5
There is no acceleration of the plate. 6 The water splashes off the sides of the plate in a plane normal to the jet. 6 Jet flow is
nearly uniform and thus the effect of the momentum-flux correction factor is negligible, β ≅ 1.