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aqa a levl physics derivations

Do I need to know specific derivations for aqa a-level physics?

Yeah there's quite a few you need to know. For example in Paper 1, you need to know how to derive dsinθ = nλ. For paper 2 there's a lot more. For example:
- The velocity of an orbit
- Escape velocity
- Kepler's 3rd law - ( r3 ∝ T2 )
- The radius of a charged particle in a magnetic field
- The kinetic theory equation for thermal physics.

(Kepler's law doesn't come up really in AQA physics but you have to know the relationship between T and R)