Question

A small water tank which holds 5000 litres of water is filled with a pump in 10 minutes. The tank is 30m above the ground.

Calculate the increase in gravitational potential energy of the water.

bobpursley
PE=mgh

technically, if the bottom of the tank is at 30 meteres, the water had to be pumped higher, and you should use h as the location of the center of gravity for the water.

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