Formulae, units and modelling

A Level Physics Equations Revision

Improve equation use by learning when each relationship applies, how to rearrange it and how to check units and answer size.

How do I revise A Level Physics equations?

Do not only memorise formulae. Practise choosing equations from the quantities given, rearranging before substitution, tracking units and checking whether the final answer is physically reasonable.

Why do I know the formula but still lose marks?

Marks are often lost through wrong assumptions, missing units, poor rearranging, incorrect powers of ten or using a formula outside its conditions.

Equation choice is a skill

Good calculation work starts by identifying the model: constant acceleration, energy, circuits, fields, waves, exponential change or another relationship.

Connect equations to graphs

Many equations appear through gradients, areas and intercepts. Link formula revision to graph interpretation so you can recognise relationships in unfamiliar data.

Frequently asked questions

How do I revise A Level Physics equations?

Do not only memorise formulae. Practise choosing equations from the quantities given, rearranging before substitution, tracking units and checking whether the final answer is physically reasonable.

Why do I know the formula but still lose marks?

Marks are often lost through wrong assumptions, missing units, poor rearranging, incorrect powers of ten or using a formula outside its conditions.

Should I memorise every A Level Physics equation?

You need to know and use the relationships required by your specification, but understanding when they apply is as important as memorising them.

How can I get faster at calculations?

Practise short timed sets, write units at each step and review mistakes by category: equation choice, rearranging, substitution, powers of ten or units.