The falling stream of water becomes narrower , as the velocity of f stream of water increases and therefore its area of cross-s decreases .
Energy of a Liquid A liquid in motion possess three types of energy
( i ) Pressure Energy
Pressure energy per unit mass = p / ρ where , p = pressure of the liquid and p = density of the liquid . Pressure energy per unit volume = p
( ii ) Kinetic Energy Kinetic energy per unit mass = ( 1 / 2v 2 ) Kinetic energy per unit volume = 1 / 2ρv 2
( iii ) Potential Energy
Potential energy per unit mass = gh
Potential energy per unit volume = ρgh Bernoulli ’ s Theorem
If an ideal liquid is flowing in streamlined flow then total energy , i . e ., sum of pressure energy , kinetic energy and potential energy per unit volume of the liquid remains constant at every cross-section of the tube .