http://www.ck12.org Chapter 6. Work and Energy
FIGURE 6.23
Illustrative Example 1
A jogger of mass 65.0 kg wishes to run up a hill of height 10 meters in 16 seconds (Figure6.24). What power must
the jogger produce?
Answer:If we assume only conservative forces, then the work the runner does running along the incline a distance
x, to a height of 10 m, is no different than the work he would do lifting his weight directly to a height of 10 m. In
other words, the work is independent of the path taken. The calculation below is done along the incline but the final
result is identical to lifting his weight a height of 10 m in a time of 16 s. SeeFigure6.24.