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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 $10\ m$? $(Given\ g=10\ m s^{-2})$.
Power of motor pump $P=2\ kW=2000\ W$
Height $h=10\ m$
Gravitational acceleration $g=10\ ms^{-2}$
Time $=1\ minute=60\ seconds$
Let $m$ be the mass of water raised per minute by motor pump.
$P=\frac{mgh}{t}$
Or $2000\ W=\frac{m\times 10\times 10}{60}$
Or $100m=60\times 2000$
Or $m=\frac{60\times2000}{100}$
Or $m=1200\ kg$
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