An 80-kg person stands at rest on a scale while pulling vertically downwards on a rope that is above them. use g = 9.80 m/s2. with what magnitude force must the tension in the rope by pulling on the person so that the scale reads 500 n?

The drag force, fd, imposed by the surrounding air on a vehicle moving with velocity v is given by fd = cdaρv 2/2 where cd is a constant called the drag coefficient, a is the projected frontal area of the vehicle, and ρ is the air density. an automobile is moving at v = 80 kilometers per hour with cd = 0.28, a = 2.3 m2, and ρ = 1.2 kg/m3.