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 θ = 40.0°, the snow is dry snow with a coefficient of kinetic friction µ k = 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 m 2 , the drag coefficient is C = 0.150, and the air density is 1.20 kg/m 3 , (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?
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 θ = 40.0°, the snow is dry snow with a coefficient of kinetic friction µ k = 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 m 2 , the drag coefficient is C = 0.150, and the air density is 1.20 kg/m 3 , (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?
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 θ = 40.0°, the snow is dry snow with a coefficient of kinetic friction µk = 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?
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?
Calculate the ratio of the drag force on a jet flying at 999 km/h at an altitude of 8.10 km to the drag force on a prop-driven transport flying at half that speed and altitude. The density of air is 0.490 kg/m3 at 8.10 km and 0.725 kg/m3 at 4.05 km. Assume that the airplanes have the same effective cross-sectional area and drag coefficient C.
Angle of the slope is 40 degree
The coefficient of kinetic friction is 0.04
the mass of the skier is 85kg
the cross-sectional area of the tucked skier is 1.3m^2
the air density is 1.2kg/m^3
the drag coefficient is 0.15
What is the terminal speed of the skier as he goes down the hill?
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