Question

On a day with no wind, a fountain in Switzerland propels 30 000 kg of water per minute to a height of 140 m.
Calculate the power used in raising the water.





power =.............................................. [4]

Answer 1

Answer:

work done =potential energy of water

so,

pe=mgh

pe = 140×30,000×9.8

pe=41,160,000j

now power =work done/time taken

work done=41,160,000j

time =1 minute=60s

power=41160000j/60s

power=686,000watts

this means power of fountain is 686000watts