Two students carry identical backpacks from the ground floor to the third floor

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

Problem

Two students carry identical

12\,\text{kg}

backpacks from the ground floor to the third floor, gaining

9.0\,\text{m}

of vertical height. Student A takes

6\,\text{s}

; Student B takes

10\,\text{s}

. Which student produces the greater average power? Briefly explain your choice.