Mathematics A-Level
sign convention
What sign convention means in Mathematics A-Level, as defined for WJEC.
Definition of sign convention
Check what you remember
Read the wording for your board, then hide it and explain sign convention in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: WJEC
A consistent choice of positive direction, for example upwards positive so that a = −g = −9.8 m s⁻², applied when using constant acceleration equations.
Topics that use sign convention
- Forces and Newton’s laws (AS Unit 2: Applied Mathematics A) (WJEC A-Level)
Related terms
- action-reaction pairs
- force
- free fall
- gravitational acceleration g
- inextensible string
- mass and acceleration
- Newton's first law
- Newton's second law
Using sign convention 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.
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