Question

What is the power of a pump if it pulls 200kg water from a 20m deep well in 30 seconds?

Answer 1

power = work done/time

work done =mgh
=200 × 9.8 × 20
=39200J

power=39200/30
1306.66 watt

Answer 2

Given :

Mass of water , m = 200 kg .

Height , h = 20 m .

Time taken , t = 30 s .

To Find :

The power of pump .

Solution :

Energy required to pull the water :

$E=mgh\\\\E=200\times 10\times 20\\\\E=4\times 10^4\ J$

Now , power is given by :

$P=\dfrac{E}{t}\\\\P=\dfrac{4\times 10^4}{30}\\\\P=1333.3\ W$

Learn More :

Power and energy

https://brainly.in/question/12838398