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2 December, 16:51

water is pumped from a stream at the rate of 90kg every 30s and sprayed into a farm at a velocity of 15m/s. Calculate the power of the pump.

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  1. 2 December, 17:21
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    340 W

    Explanation:

    Power = change in energy / change in time

    P = ΔKE / Δt

    P = ½ mv² / Δt

    P = ½ (90 kg) (15 m/s) ² / (30 s)

    P = 337.5 W

    Rounded to 2 significant figures, the power is 340 W.
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