2. Two mountains are at elevations of 850m and 750m above the valley between them. A ski run extends from the top of the higher peak to the top of the lower one, with a total length of 3.2km and an average slope of 30 degrees, a) A skier starts from rest on the higher peak. At what speed will be arrive at the top of the lower peak if he just coasts without using poles? b)How large a coefficient of friction would be tolerable without preventing him from reaching the lower peak? what i've done: 2a) (m)(9.8)(850) = (m)(9.8)(750) + (0.5)(m)([tex]vf^2[/tex]) [tex]vf^2[/tex] = 1960 [tex]vf[/tex] = 44.27 m/s b)I am stuck on this one. Thanks in advance for your help.