Question

A pump lifts water from a lake to a large tank 20m above the lake. How much work against gravity does the pump do as it transfers 5.0m^3 of water to the tank? One cubic meter of water has a mass of 1000kg.

Answer 1

How to solve this?

Answer 2

The mass of \(\Large 5.0 m^{3}\) of water is: \(\Large m=5.0\times 1000=5000\) \(Kg\)

The work = weight of the water X height of the center of mass. So,
\(\Large A=5000\times10\times20=1.0\times10^{6}\) \(J\)

Answer 3

@JungHyunRan thanks!

Answer 4

Welcome :)