A non-viscous liquid of constant density `1000 kg//m^(3)` flows in a streamline notion along a tube of variable cross-section. The tube is kept inclined in the vertical plane as shown in the figure. The area of cross-section of the tube at two points `P` and `Q` at heights of 2m and 5m are respectively `4xx10^(3)m^(2)` and `8xx10^(-3)m^(2)`. The velocity of the liquid at point P is `1m//s`. Find the work done per unit volume by the pressure and the gravity forces as the fluid flows from point P to Q. Take `g=9.8m//s^(2)`.

Answer

`+29625J//m^(3),-30000J//m^(3)`