Question

Please help me with this

Answer 1

Volume of water = 50 L = 50 × 10-3 m3

Density of water = 1000 kgm-3

Mass of water = Volume of water × density of water

= 50 × 10-3 × 1000 = 50kg

Work done in raising 50kg water to a height of 25m against the force of gravity is:

W = mg × h = mgh

Power P = work done/time taken = mgh/t = 50 x 10 x 25J/5s 2500