Physics A-Level
Random molecular motion
What Random molecular motion means in Physics A-Level, as defined for AQA.
Definition of Random molecular motion
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Reference: AQA
Fluid molecules move randomly and collide unevenly from different directions, so a suspended particle experiences a fluctuating resultant force.
Topics that use Random molecular motion
- Molecular kinetic theory model (A-level only) (AQA A-Level)
Related terms
- Brownian motion
- Collisions and resultant forces
- Conservation of momentum
- Elastic collision
- Empirical versus theoretical knowledge
- Gas laws from experiment
- Internal energy of an ideal gas
- Kinetic theory and observation
Using Random molecular motion in the exam
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