Question

In a dam generating hydro electric power, water falls at a rate of 1000 kg s-1 from a height of 100 m. (a) Calculate the initial potential energy of the water.(b) Assuming that 60% of the energy of the falling water is converted to electrical energy, calculate the power generated (g=9.8 m s-2)Can u show how to do it?

Answer 1

given,

mass of water =1000kg

height =100m

gravity =9.8m s-2

thus ,

initial potential energy of water =>

U =mgh

U =1000×9.8×100

U =980000J

Answer 2

Answer:

a)P.E =mgh

1000×9.8×100

=980000 J

is the answer