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GCSE Physics · key term
The force acting normally per unit area of a surface, measured in pascals (Pa).
Used by AQA, Edexcel and OCR
Specification 4.3.3.1, 4.3.3.2, 4.5.5.1.1 · Paper 1, Paper 2
Force acting normally on each unit area of a surface.
Revise: Particle motion in gasesThe force due to gas pressure acts at right angles to the container wall.
The normal force acting per unit area of a surface.
Specification 14.12, 14.16P, 14.17P, 14.18P, 15.8P, 15.9P, 15.10P, 15.11P, 15.12P, 15.13P, 15.15P · Paper 2
The force acting normally on each unit area of a surface.
Revise: Gas PressureThe particles are far too small to follow individually. Instead, the particle model connects their combined microscopic behaviour to a measurable macroscopic effect: gas pressure.
Force acting per unit area of a surface.
Force per unit area acting at right angles to a surface.
The force acting normally on each unit area of a surface, measured in pascals (Pa).
Force acting per unit area, measured in pascals (Pa).
The normal force acting per unit area of a surface.
The normal force acting on each unit area of a surface; it describes how concentrated the force is.
Force normal to a surface divided by the area over which that force acts.
Force acting normally per unit area, measured in pascals (Pa).
Force acting normally on each unit area of a surface, measured in pascals (Pa).
The force acting normally to a surface per unit area.
Specification P1.3a, P1.3c, P1.3d, P1.3f, P1.3g, P1.3j, P2.3n, P2.3o · Paper 1 (Foundation), Paper 3 (Higher)
Force acting normally per unit area of a surface, measured in pascals (Pa).
Revise: Particle motion and pressureGas pressure therefore acts in every direction rather than only downwards.
The force exerted normally on each unit area of a surface.
Force per unit area, measured in pascals (Pa).
Force acting normally on each square metre of a surface, measured in pascals (Pa).
The force exerted per unit area of a surface.
Force acting at right angles to a surface per unit area of that surface.
Paper 1, Paper 2
The force acting normally on each unit area of a surface.
Revise: Particle Motion and Gas PressureThe gas therefore exerts pressure in all directions, rather than pressure being simply a downward push caused by its weight.
The force acting perpendicular to a surface per unit area of that surface.
Force acting at right angles to a surface per unit area, measured in pascals (Pa).
For an explanation of increasing pressure, give the complete chain: higher temperature → greater average kinetic energy → faster molecular motion → more frequent and harder collisions with the walls → greater force on the walls → greater pressure.
After calculating, check the direction of change: compression should increase pressure, while expansion should decrease it.
Check the relationship in your answer: for the same force, a smaller area should produce a greater pressure.
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