To improve health and train physically, some people choose to run in a pool of water rather than outside or on a treadmill in air. Typical values for the density of air and water are 1.29 kg/m and 1.00 x 10 kg/m , respectively. Consider a runner who is moving at 3.38 m/s in air. (a) Estimate the cross-sectional area of the person running. 0.6207 x mz Assuming the drag coefficient for the human body is approximately 1.00, determine the resulting drag force on the person while running in air. (Use your estimate.) 4.574 N (b) Again, using your estimate of the cross-sectional area and the same drag coefficient, determine the resulting drag force on the person running at the same speed in water. 3545.563 IN (c) Does the speed in part (b) seem achievable while running in water? Explain your answer.Banked curves are designed so that the radial component of the normal force on the car rounding the curve provides the centripetal force required to execute uniform circular motion and safely negotiate the curve. A car rounds a banked curve with banking angle @ = 25.80 and radius of curvature 135 m. (a) If the coefficient of static friction between the car's tires and the road is us = 0.316, what is the range of speeds for which the car can safely negotiate the turn without slipping? 20.457 Vlow =L X Your response differs from the correct answer by more than 10%. Double check your calculations. m/s Vhigh = 35.33 m/s