Question

please solution

important question
​

Answer 1

Answer:

1200 kg

Question: How much water(in kg) a pump at 2kW can raise in one minute to a height of 10 m.       (g = 10)

Explanation:

             In the given question:

 Power = 2kW = 2000 W

 Time = 1 min   = 60 s

 Height(h)        = 10m

                   g   = 10 m/s²

Using, P = Work/time

          P = (Force * displacement)/time

          P = (ma * h)/t

          P = (mgh)/t

Substituting the given values :

⇒ 2000 = (m * 10 * 10)/(60)

⇒ 2000 = (m * 100)/60

⇒ 1200 = m

    Hence the mass of the water is 1200 kg.

Answer 2

Given Data :-

☞ Power(P) = 2kW = 2(1000) = 2000 W

☞ Time (t) = 1 min = 60 s

☞ Height (h) = 10 m

☞ Acceleration due to Gravity (g) = 10m/s²

To find :-

➔ Mass of Water (m) in kg

Solution :-

as , Power = Work done * time

-----------

P = Wt

----------

Work done = mgh

⇒ 10*10* m = 100 m

--------------------------------------

so , from P = Wt

⇒ 2000 = 100m/60s

⇒ 2000 * 60 = 100 * m

⇒ 20 * 60 = m

⇒ m = 1200 kg

___________________________________

• Mass of Water (m) = 1200 kg