In downhill speed skiing a skier is retarded by both the air drag force on the body and

Chapter 6, Problem 40

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In downhill speed skiing a skier is retarded by both the air drag force on the body and the kinetic frictional force on the skis. (a) Suppose the slope angle is u 40.0, the snow is dry snow with a coefficient of kinetic friction mk 0.0400, the mass of the skier and equipment is m 85.0 kg, the cross-sectional area of the (tucked) skier is A 1.30 m2, the drag coefficient is C 0.150, and the air density is 1.20 kg/m3 . (a) What is the terminal speed? (b) If a skier can vary C by a slight amount dC by adjusting, say, the hand positions, what is the corresponding variation in the terminal speed? Modu