Chapter 6, Problem 84P

Calculate the velocity a spherical rain drop would achieve falling from 5.00 km (a) in the absence of air drag (b) with air drag. Take the size across of the drop to be 4 mm, the density to be $1.00\times {10}^{\text{3}}{\text{ kg/m}}^{\text{3}}$ , and the surface area to be $\pi r^2$ .