Imagine that you enter in a 10 km running race on an out and back flat course. Your average running velocity is 4.17 m/s.. Determine what the drag force would be acting against your motion if the drag coefficient is 0.8, your frontal area is 1.0 m^2, and your density is 1 kg/m^3

8.836N

Now consider what would happen with a constant wind of 1 m/s blowing as a headwind in the first half (first 5000m) and a tailwind in the last half of the race (last 5000m). What would the drag force be in the first half of the race? What would the drag force be in the second half of the race?