Mathematics A-Level

dimensional consistency

What dimensional consistency means in Mathematics A-Level, as defined for WJEC.

Definition of dimensional consistency

Check what you remember

Read the wording for your board, then hide it and explain dimensional consistency in your own words. Rough notes are fine. This is a self-check, with no mark or grade.

Reference: WJEC

Vital across equations in mechanics problems, since substituting unstandardised units without prior conversion to SI base units introduces fatal calculation errors.

WJEC · Quantities and units in mechanics (AS Unit 2: Applied Mathematics A)

Topics that use dimensional consistency

Quantities and units in mechanics (AS Unit 2: Applied Mathematics A) (WJEC A-Level)

Related terms

Using dimensional consistency in the exam

Check the command word and mark scheme for your exact question. After comparing your explanation with the reference, use the term in an answer on the linked topic. This practice does not predict an exam mark.

Practise Mathematics questions

Create a free account to answer exam-style questions on this topic and get feedback on your answers.

Start free

A week of Premium from your first lesson · Then the free plan continues · No card, no charge

All Mathematics A-Level terms