A pump is required to lift a mass of 850 of water per minute from a well of depth 14.8 and eject it with a speed of 17.7 .
Part A
How much work is done per minute in lifting the water?
Part B
How much in giving the water the kinetic energy it has when ejected?
Part C
What must be the power output of the pump?
3 answers
Your numbers require dimensions.
Thulu
work to lift = m g h = 850 * 9.81 * 14.8 =123409.8 J/min
work for Ke = (1/2)(850)(17.7)^2 =133148.25J/min
C) add those and divide by 60 to get Joules/second or Watts
=(123409.8+133148.25)/60=4276 J/sec or W
work for Ke = (1/2)(850)(17.7)^2 =133148.25J/min
C) add those and divide by 60 to get Joules/second or Watts
=(123409.8+133148.25)/60=4276 J/sec or W
2 answers