Three water pumps lift water to a storage tank as described below

PHYSICS · Subjective · A Level · Physics · Mechanics and materials · Mechanics and materials

Problem

Three water pumps lift water to a storage tank as described below. Take

g = 10\,\text{m/s}^2

. Pump P: lifts

50\,\text{kg}

of water through

10\,\text{m}

20\,\text{s}

Pump Q: lifts

40\,\text{kg}

of water through

15\,\text{m}

15\,\text{s}

Pump R: lifts

60\,\text{kg}

of water through

8\,\text{m}

12\,\text{s}

(a) Compute the power output of each pump. (b) Rank the pumps from most powerful to least powerful.