A pump is used to pump water to a height of 9.0m at a rate of 2.4 kg s^-1.What is the minimum power of pump

Question

eric_d · Answer

a)if the speed at which water enters and leaves the pump is negligible?

eric_d · Answer

b) if the speed at which water enters and leaves the pump is negligible ,but the speed at which it leaves the pump is 6.0 ms^-1?

eric_d · Answer

@Abhisar

abhisar · Answer

$\color{blue}{\text{Originally Posted by}}$ @eric_d
b) if the speed at which water enters and leaves the pump is negligible ,but the speed at which it leaves the pump is 6.0 ms^-1?
$\color{blue}{\text{End of Quote}}$


What does this line means ?

eric_d · Answer

Idk. if the speed at which water enters and leaves the pump is negligible means..?

abhisar · Answer

No it says speed at which water eneters and leaves the pump is negligible and then again says speed at which it leaves the pump is 6 m/s

eric_d · Answer

I don't know

eric_d · Answer

The given answer is a)212W, b)255W
I think, v must find a) first

abhisar · Answer

$\color{blue}{\text{Originally Posted by}}$ @eric_d
a)if the speed at which water enters and leaves the pump is negligible?
$\color{blue}{\text{End of Quote}}$

is it difference between the speed at which water enters and leaves the pump is negligible ?

eric_d · Answer

I don't know

anonymous · Answer

so simple,
Power in the Pump= mass per second * height * gravitational acceleration
P= 2.4 * 9 * 10
P = 216W