Stokes' law

Stokes' law describes how the friction (drag force) acts on small, spherical objects moving through a viscous fluid, like oil or water. It states that this force depends on the object's size, the fluid's viscosity, and the speed of the object. Specifically, the force increases with the sphere's radius, the fluid's viscosity, and the velocity. This law helps us understand phenomena like sediment settling in water or how tiny particles move in liquids. It's accurate for small, slow-moving objects where the flow around them is smooth and steady.