Question

Water has to be lifted to a height of 30m from an underground sump at the rate of 10 liters/s. Consider that there are no losses in the system .Calculate the power required by the prime mover(5)

Answer 1

Answer:

Explanation Density of water=1kg/l

So 10 l water masses 10 kg

Now 10 kg water weighs 100N=Force

Workdone against gravity=mgh

=10×10×30=3000J

Since 1 litre of water transported per second,3000j work is done per second so

Power =w/t=3000J/sec=3000watt