Tutorial $5-$ Unsteady flow

Q$1.$ Valve at location $"2"$ is suddenly opened. The water head $H$ accelerates the flow. As a result,

the velocity in the pipe increases and the accelerating head is reduced by friction and minor losses.

Derive a relationship for to show how the flow approaches a steady state, based on the given

quantities, $H,$ loss coefficient $k($which include the friction and minor losses$),$ length $L,$ the final

velocity in the pipe $V_0.$