Scope
Names, symbols, definitions, and units for quantities of mechanics — mass, force, pressure, energy, power, momentum, and related quantities that describe the motion and equilibrium of physical bodies.
What You'll Find
1
Defines base quantity mass and its extensive network of derived mechanical quantities
2
Covers both Newtonian (classical) and relativistic momentum and energy
3
Distinguishes between weight (a force) and mass — a common source of confusion
4
Includes pressure, stress, viscosity, and surface tension alongside energy and power
Obtain the Standard
Published by the International Organization for Standardization (ISO). Edition 2019 (2nd). Developed by ISO/TC 12 — Quantities and units.
Browse Entries
54 quantities defined in Part 4