## Total Energy of a Liquid | Pressure, Kinetic, Potential Energy – Hydrodynamics

We are giving a detailed and clear sheet on all Physics Notes that are very useful to understand the Basic Physics Concepts.

**Energy of a Liquid**

A liquid in motion possess three types of energy

(i) **Pressure Energy**

**Pressure energy per unit mass**

= \(\frac{p}{\rho}\)

where, p = pressure of the liquid

and ρ = density of the liquid.

Pressure energy per unit volume = p

**Pressure Energy SI Unit
**SI unit of pressure energy is Joule(J).

(ii) **Kinetic Energy**

Kinetic energy per unit mass

= \(\frac{1}{2}\) v²

Kinetic energy per unit volume

= \(\frac{1}{2}\) ρv²

**Kinetic Energy Units:
**The SI unit of kinetic energy is Joule

The CGS unit of kinetic energy is erg.

(iii) **Potential Energy**

Potential energy per unit mass =gh

Potential energy per unit volume = ρgh

**Potential Energy Unit:
**The SI unit of kinetic energy is Joule.

**Hydrodynamics:**

In physics, hydrodynamics of fluid dynamics explains the mechanism of fluid such as flow of liquids and gases. It has a wide range of applications such as evaluating forces and momentum on aircraft, prediction of weather, etc.