Question

1- The power of a motor is 2kW. How much water per minute the pump can raise to a height of 10m?(g=10m/s)
2- What is the work done in order to increase the velocity of a car from 18 km/h to 90km/h, if the mass of the car is 2000 kg?

Answer 1

P=2000 W

h= 10m

g = 10 m/s

t= 60s

W= mgh

P = W/t

2000=m*10*10/60

m=1200 g

Amount of water pumped per minuter is 1200 g

I am sure this is how we do it just do calculations cause I might have made calculation mistake

Answer 2

I think that this solution will be very helpful for u