A spherical pearl with a density of 2.000 × 10³ kg/m³ and a radius of 200.0 millimetres is falling through a liquid shampoo that has a density of 1.400 × 10³ kg/m³ and a viscosity of 0.6000 Pa·s.
(i) What is the terminal speed of the pearl?
(ii) What is the viscous drag force on the pearl at this speed?