Density of water is 1000 kg/m^2.
So the mass of water = volume of water.
Volume of water is = pi * r^2 * h
Since the water flows 20 meters per second, h = 20.
Volume = pi * 0.05^2 * 20 = 1/20 pi
So the mass = (1/20) pi * 1000 = 50 pi
Workdone = 1/2 * 50 pi * 20^2 = 31.4 kJ...
A pump taking water from a large reservoir, is used to spray a jet of water with speed 20 m/s and radius 0.05 m, from a nozzle level with the surface of the reservoir. Calculate the power of the pump.
Workdone = Force * distance
Power = Force * velocity
I have no idea