Module
Physical quantities and measurement
Begin with measurable quantities, units and how we express a measurement.
Before describing motion or comparing forces, we need a common way to express what we measure. This module accompanies the first segment in classical mechanics: physical quantities and measurement.
Start with the note on quantities and units below. It introduces how a numerical value and a unit work together, and how changing units leaves the physical quantity unchanged.
Continue with dimensions and dimensional analysis to check how quantities fit together in an equation. Notes on measurement uncertainty and estimation will follow.