Question

A fire engine must lift 30 kg of water a vertical distance of 20 m each second. What is the amount of power needed for the water pump for this fire hose?

Is the answer 5880W? If yes, why so?

Answer 1

potential energy per second = m g h = work done per second = power
= 30 * 9.81 * 20
5886 Joules/second or Watts
=