Using Stokes’ Law provided in the lab manual, determine the viscosity (m) of the fluid using the average velocity of the three spheres. A common unit of viscosity is the Poise, or 1 g/cm.s. This page titled 14.2: Stokes’ Law is shared under a CC BY-NC-SA 4.0 license and was authored, remixed, and/or curated by Andrei Tokmakoff via source content that was edited to the style and standards of the LibreTexts platform. What is Stokes’ Law ? Stokes’ Law states that the drag force acting on a spherical object moving through a viscous fluid is directly proportional to the velocity of the object, the radius of the object, and the viscosity of the fluid. Stokes’ Law describes the force of friction that acts on spherical objects when they move through a viscous fluid. It’s like how a ball falls slower through honey than through water because honey is thicker. Stokes' law is a mathematical formula that describes the drag force preventing tiny, spherical particles from falling through a fluid medium.
