Three identical elevators each lift a load through a height of

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

Problem

Three identical elevators each lift a

400\,\text{kg}

load through a height of

18\,\text{m}

. Elevator X completes the lift in

15\,\text{s}

, Elevator Y in

20\,\text{s}

, and Elevator Z in

25\,\text{s}

. Rank the elevators from greatest to least average power output and state the average power for Elevator X.