Physical quantities
Build the language of measurement and develop reliable order-of-magnitude intuition.
- 01What physical quantities represent
- 02Magnitude, numerical values and units
- 03Estimating physical quantities
- 04Order-of-magnitude reasoning
TOPIC 1 · AS LEVELPhysical quantities
Physical quantities
and units.
Build the measurement, uncertainty and vector habits used throughout Cambridge Physics.
YOUR LEARNING PATH
Four modules. One strong foundation.
Learn each idea, use the toolkit to build fluency, then test yourself with module and structured practice.
SI quantities and base units
Use SI base and derived units fluently and test equations using dimensional consistency.
- 01SI base quantities and units
- 02Derived quantities and derived units
- 03Expressing derived units using base units
- 04Homogeneity of physical equations
- 05Prefixes and standard form
Errors and uncertainties
Evaluate experimental measurements with the precision expected in CIE practical papers.
- 01Random and systematic errors
- 02Zero error and calibration
- 03Accuracy and precision
- 04Absolute and percentage uncertainty
- 05Combining uncertainties
- 06Recording and presenting measurements
Scalars and vectors
Represent, combine and resolve vectors in the situations used throughout mechanics.
- 01Scalar and vector quantities
- 02Representing vectors
- 03Vector addition and subtraction
- 04Resolving vectors into components
- 05Vector problems in two dimensions
Calculate, convert and visualise.
Practise prefixes, uncertainty propagation and vector resolution with instant feedback.
Open toolkit →CIE PRACTICE WORKSHOPThink like an examiner.
Work through multi-step questions using optional hints and complete solutions.
Start structured practice →