A skier descends a vertical drop of in

PHYSICS · Single correct · A Level · Physics · Mechanics and materials · Mechanics and materials

Problem

70\,\text{kg}

skier descends a vertical drop of

180\,\text{m}

1.8\,\text{min}

, reaching the bottom with negligible change in speed. What is the skier’s average power output due to gravity during the descent? (a)

6.9\times10^{4}\,\text{W}

(b)

6.9\times10^{2}\,\text{W}

(c)

1.1\times10^{3}\,\text{W}

(d)

1.1\times10^{4}\,\text{W}