Physics GCSE
random motion
What random motion means in Physics GCSE, as defined for AQA.
Definitions of random motion
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Reference: AQA
Molecules move continuously in every direction, with no preferred direction and a wide spread of speeds, changing direction whenever they collide with one another or with the walls.
Movement of molecules at high speed in every direction, so collisions arrive from all directions.
Topics that use random motion
- Atmospheric pressure (AQA GCSE)
- Particle motion in gases (AQA GCSE)
Related terms
- altitude
- average density
- Boyle's Law
- collision frequency
- column of air
- comparing heights
- compression by the air above
- extra layer of air
Using random motion in the exam
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