Question

5. Solve the following examples.
Q. An electric pump has 2 kW power
How much water will the pump lift
every minute to a height of 10 m?​

Answer 1

Given:-

• Power of electric pump, P = 2 Kw = 2000 W

• Height,h = 10 m

• Acceleration due to gravity,g = 9.8 m/s²

• Time taken,t = 1 minutes = 60 seconds

To be calculated:-

How much water will the pump lift every minute to a height of 10 m?

Formula used:-

• Work done = m × g × h

• P = W/t

Solution:

Firstly,

P = Work done/Time taken

We know that, work done = m × g × h

P = m × g × h / t

★ Substituting the values in the above formula,we get;

⇒ 2000 = m × 9.8 × 10 / 60

⇒ 2000 × 60 = m × 98/10 × 10

⇒ 120000 = m × 98

⇒ m × 98 = 120000

⇒ m = 120000/98

⇒ 1,224.48 kg

Thus,the electric pump lift every minutes 1224.48 kg of water .