+33661 Work is a form of energy transfer. The energy transferred to the water by the pump is used, first, to raise the water to the surface (potential energy) and then any remaining energy that has been transferred appears as kinetic energy as the water shoots out (presumably from a hose) at the top.
Not sure if this answers your question!
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+33661 (a) Work per minute = Potential energy per minute = mgh
Work each minute = 800*9.8*14 J = 109760 J
(b) Work per minute = kinetic energy per minute
Work each minute = (1/2)*800*182 J = 129600 J
(c) Power = rate of doing work = (109760 + 129600)/60 ≈ 3989 W (because 1 W = 1 J/s)
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+1832 for b , why you put work = kinetic energy
It must be The difference between the kinetic energy
can you illustrate it for me ~ ?
+33661 Work is a form of energy transfer. The energy transferred to the water by the pump is used, first, to raise the water to the surface (potential energy) and then any remaining energy that has been transferred appears as kinetic energy as the water shoots out (presumably from a hose) at the top.
Not sure if this answers your question!
.
