This equation can be solved for velocity v to obtain the following:
v=สแครูท
Equation 9-13 shows that the velocity of water at the base of the dam depends on the height (h) of the dam and on gravity (g). Since gravity is constant at about 32 ft/sec2 or 9.8 m/sec2 in the earth's surface, the velocity depends only on the height h and not on the mass of the flowing fluid. This is an important property in the study of fluid flow. The following example will illustrate this property.