A sled is pulled at constant speed up a straight snow-covered incline long that rises…

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

Problem

50\,\text{kg}

sled is pulled at constant speed up a straight snow-covered incline

20\,\text{m}

long that rises

6.0\,\text{m}

vertically. The coefficient of kinetic friction between the sled and the snow is

0.10

. The trip takes

25\,\text{s}

. What is the average power that the winch cable must deliver? (a)

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

(b)

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

(c)

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

(d)

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