SI Units
- There are a seemingly endless number of units in Physics
- These can all be reduced to six base units from which every other unit can be derived
- These seven units are referred to as the SI Base Units; this is the only system of measurement that is officially used in almost every country around the world
SI Base Quantities Table
- These base units are then used to derive other common units
- These units have special names, for example:
- Newtons, N [kg m / s2]
- Joules, J [N m]
- Pascals, Pa [kg / m s2]
Common Units Table
Exam Tip
Sometimes marks in an exam question are given for the unit, so make sure you remember which is the correct one for the quantity in your answer eg. If the answer is a force, it must have the units of Newtons (N)
