Physics A-Level
Closed system
What Closed system means in Physics A-Level, as defined for AQA.
Definitions of Closed system
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Reference: AQA
One in which no energy enters or leaves, so the sum of all energy stores is constant.
A system on which no resultant external force acts, so total momentum is conserved.
Topics that use Closed system
- Conservation of energy (AQA A-Level)
- Momentum (AQA A-Level)
Related terms
- Algebraic modelling of collisions
- Area under a force–time graph
- Coalescence and explosions
- Conservation of linear momentum
- Consistency of units and signs
- Dissipated or wasted energy
- Elastic versus inelastic collisions
- Explosions as momentum-conserving separations
Using Closed system in the exam
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