A river of salty water is flowing with a velocity 2 ~m / s . If the density of the water is 1.2 ~g / cc , then the kinetic energy of each cubic metre of water is

Step-by-step solution

Given, velocity of river, (v)=2 ~m / s Density of water =1.2 ~g / cc Mass of each cubic metre m= 1.2 10⁻³ (10⁻² )^3 =1.2 10^3 ~kg aligned Kinetic energy & = 1 2 m v^2 & = 1 2 1.2 10^3 (2)^2 & =2.4 10^3 ~J =2.4 ~kJ aligned