NCERT Exemplar X — task. Science CBSE, Class 9.

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The power of a motor pump is \(2\ kW\). How much water per minute the pump can raise to a height of \(10\ m\)? (Given g = 10 m s–2)

The formula to calculate the Work done (\(W\)) is,

\(W\ =\ m \times g\ +\ h\)
\(W\ =\ m \times g\)
\(W\ =\ m \times \frac{g}{h}\)
\(W\ =\ m \times g \times h\)

Power is calculated by:

\(Power\ =\ Work\ done \times Time\)
\(Power\ =\ \frac{Work\ done}{Time}\)

The pump can raise \(kg\) of \(water\ per\ minute\).

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