The power of a motor pump in your neighbour's house is $20 W$ . How much water can be pumped per minute to raise the height to $10 m$ ?

Take $g = 10 m s^{- 1} .$

6 kg

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20 kg

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12 kg

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24 kg

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Solution

The correct option is C
12 kg

Given power = 20 W, height =10 m.

Work done = mgh
and, $power = \frac{Work done}{Time taken}$
$S o, 20 = \frac{m \times 10 \times 10}{60}$
$Therefore, mass = 12 kg$

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The power of a motor pump in your neighbour's house is 20 W. How much water can be pumped per minute to raise the height to 10 m ? Take g=10 ms−1.

The correct option is C 12 kg Given power = 20 W, height =10 m. Work done = mgh and, power=Work doneTime taken So,20=m×10×1060 Therefore, mass = 12 kg

The power of a motor pump in your neighbour's house is $20 W$ . How much water can be pumped per minute to raise the height to $10 m$ ?

Take $g = 10 m s^{- 1} .$

The correct option is C
12 kg

Given power = 20 W, height =10 m.

Work done = mgh
and, $power = \frac{Work done}{Time taken}$
$S o, 20 = \frac{m \times 10 \times 10}{60}$
$Therefore, mass = 12 kg$