A cubical vessel of height 1m is full of water. What is the workdone in pumping water out of the vessel?


Height of the vessel, h= 1m

Height of water in the vessel = 1/2

Volume of water, V = h3 = 1 m3

Mass of water, m=ρV = 1000×1 = 1000  kg

Work done in pumping water out of the vessel = W =mg(height of water0

= 1000 x 10 x 1/2 = 5000J

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