As shown in the figure water flows with a velocity v at a de

As shown in the figure, water flows with a velocity v at a depth y in a channel of rectangular section which is closed by a sluice gate. The water floes smoothly down to a vertical shift. Calculate the rise of water level deltay just upstream of the sluice gate. A two dimensional diversion structure diverts the flow downward through a vertical slot with 1 ft opening with the aid of a sluice gate as shown in the figure. By the energy equation. By the momentum equation. Wich one is the correct answer? Why?

Solution

The water is flow in downward direction with the velocity, during flow of water in downward conditions the gravity is act as a major role.

The water have a Kinectic energy during flow, so it solve by energy equcation

K = 1/2 m v²

^{m = Mass of the object}

^{v =Velocity of the water}