What is the drag force exerted on a runner running at 7 min/mi pace (3.83 m/s) on a day with no wind? assume a coefficient of drag of 0.8, an air density of 1.204 kg/m3, and a frontal surface area of 1.0 m2.

7.06454224 Newtons

Explanation:

C = Drag coefficient = 0.8

ρ = Density of air = 1.204 kg/m³

A = Surface area = 1 m²

v = Velocity of wind = 7 min/mi = 3.83 m/s

The Drag force is given by

The drag force exerted on the runner is 7.06454224 Newtons

the skeletons of most mammals reach a certain size and then stop growing. however, many animals, including some mammals, keep growing throughout their lives. kangaroos, for example, just keep growing and growing until they die. also, the longer an animal lives the greater the chance it might catch some deadly disease.