physics problem what is the measurment of power output?

Question

A pump is required to lift a mass of 850 of water per minute from a well of depth 15.0 and eject it with a speed of 18.6 .
How much work is done per minute in lifting the water?
Take the free fall acceleration to be = 9.80 .
1.25×105 J
Correct



Part B
How much in giving the water the kinetic energy it has when ejected?
1.47×105 J
Correct



Part C
What must be the power output of the pump?
Take the free fall acceleration to be = 9.80 .

Answer 1

Assuming you mean 850 kg, 15 mm and 18.6 m/s

W1 = (850 kg)(9.8 m/s^2)(15 m) = 1.2495 J

W2 = ((850 kg)*(18.6 m/s)^2)/2 = 1.47033J

P = (W1 + W2) J/min)( 1 min/(60 sec) = 4.533 KW