A skier with a mass of 80 kg starts from rest at the top of a slope and skis down from an elevation of 110 m (▶ Figure 5.23). The speed of the skier at the bottom of the slope is 20 m/s. (a) Show that the system is nonconservative. (b) How much work is done by the neoconservative force of friction?
THINKING IT THROUGH. (a) If the system is nonconservative, then Eo ≠ E,
(actually here E

Transcribed Image Text:

-20 m/s 110 m FIGURE 5.23 Work done by a nonconservative force See Example 5.14 for description.