You throw a ball straight down from an apartment balcony to the ground below. the ball has an initial velocity of 5.10 m/s, directed downward, and it hits the ground 1.92 s after it is released. find the height of the balcony.

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.