A 70.0 kg skier with an initial speed of 11.0 m/s coasts up a 2.50 m high rise a
ID: 2138346 • Letter: A
Question
A 70.0 kg skier with an initial speed of 11.0 m/s coasts up a 2.50 m high rise as shown in Figure 6.23. Find his final speed at the top, given that the coefficient of friction between her skis and the snow is 0.0800. (Hint: Find the distance traveled up the incline assuming a straight-line path as shown in the figure.)
m/s
Explanation / Answer
(.5)mvi^2 - mgh - (u)(m)(g) (cos(x)(h))/(sin(x))= (.5)mvf^2
1/2*70*11^2 - 70*9.8*2.5 - 0.08*70*9.8*cos35*2.5/sin35 = 1/2*70*v^2
final speed = 8.15 m/s