Question

Water falls from a height of 60 m at the rate of 15 kg/ s to operate a turbine . The losses due to frictional forces are 10% of energy. How much power is generated by the turbine ? (g = 10 m / s${}^2$ )

Answer 1

Given,

$h=60m$

$\frac{m}{t}=15kg/s$

$g=10m/s^2$

Loss due to friction force is $10$%, only $90$% input is used to generate power,

$P=gh\frac{m}{t}\times \frac{90}{100}$

$P=10\times 60\times 15\times 0.9$

$P=8.1kW$