1.4.25 - Stokes’ law and viscosity

A be able to use the equation for viscous drag (Stokes’ Law), F = 6πηrv. b understand that this equation applies only to small spherical objects moving at low speeds with laminar flow (or in the absence of turbulent flow) and that viscosity is temperature dependent.

Use - stokes’ law and viscosity to connect the rule to the data and decision in the question.

This matters because - stokes’ law and viscosity determines what can be inferred or chosen; begin with the stated conditions and keep the conclusion tied to the evidence.

Example: apply - stokes’ law and viscosity to one small, clearly defined case, show the key step or comparison, and explain the result in words.

Boundary: - Stokes’ law and viscosity is not a universal recommendation. Check the syllabus scope, assumptions, units and the limits of the evidence before generalising.