4m^3 of water is to be pumped to a height of 20 m and forced into a reservoir at a pressure of 2*10^5 Nm^2. The work done by the motor is(external pressure =10^5 Nm^2)
4m^3 of water is to be pumped to a height of 20 m and forced into a reservoir at a pressure of 2*10^5 Nm^2. The work done by the motor is(external pressure =10^5 Nm^2)
Answers (1)
Work done = change in gravitational potential energy + change in pressure energy
Work done = mgh + V∆p=Vdgh+ V∆p; where d is density of water