A 70.0 kg skier with an initial speed of 11.0 m/s coasts up a 2.50 m high rise 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

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.)

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

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