P3

5. (5 points) If you run the cone experiment with very tiny cones, in a very viscous fluid such as cold glycerin, you find that the big cone (with twice the radius) falls twice as fast as the small cone. With that information, estimate the drag force F in terms of the fluid density p, the object's speed v, the radius r, and the fluid's kinematic viscosity v (dimensions of length squared per time). This is known as Stokes' drag