Question

A pump delivers 1000 l of water at a height of 15m in 120 sec calculate power and work

Answer 1

Work = mgh
= Vdgh
= 1000 L × 1 kg/L × 9.8 m/s² × 15 m
= 147000 joules
= 147 kilojoules

Power = Work / Time
= 147 kilojoules / 120 s
= 1.225 kilowatts