1.31P Centre of gravity
The weight of a body acts vertically downward through its centre of gravity, sometimes called its centre of mass in diagrams.
- Syllabus
- 2024
- Objective
- 1.31
- Level
- —
Exam analysis
Chance of appearing14%of analysed past papers
Latest appearanceJan 2023
Most common paperPaper2PR
Typical marks1
Common command terms
- State
- Draw
Scoring notes
- Common mistake
- Drawing the weight arrow from a random point instead of from the centre of gravity.
Recent exam appearances
Jan 2023Paper2P [null] · TZ05(b)(i)[ 2 ]1.31P Centre of gravity
Jan 2021Paper2PR [null] · TZ02(a)(i)[ 1 ]1.31P Centre of gravity
May 2020Paper2PR [null] · TZ03(a)(i)[ 1 ]1.31P Centre of gravity
Jan 2020Paper2PR [null] · TZ02(a)[ 1 ]1.31P Centre of gravity
June 2019Paper2P [null] · TZ08(a)[ 1 ]1.31P Centre of gravity
Practice this objective
Coverage 2019–2023 · Updated 16 Jul 2026
1.31P Centre of gravity
Know that the weight of a body acts through its centre of gravity
Concept essentials
- Centre of gravity is the point where an object’s weight acts.
- Centre of mass is accepted as an equivalent name in these questions.
- A weight arrow should point vertically downward.
- When a centre of gravity is marked, the weight force starts from that point.