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?
Rotational Equilibrium And Rotational Dynamics
In physics, the state of balance between the forces and the dynamics of motion is called the equilibrium state. The balance between various forces acting on a system in a rotational motion is called rotational equilibrium or rotational dynamics.
Equilibrium of Forces
The tension created on one body during push or pull is known as force.
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?
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