GCSE Physics Equations You Must Know

June 19, 2026

GCSE Physics has a long list of equations, and depending on your exam board and tier, many of them must be recalled from memory — they are not all given on a formula sheet. This guide covers the key equations and how to learn them efficiently.

Core equations to memorise

• Energy: kinetic energy = ½ × mass × speed²
• Power = energy ÷ time; power = work done ÷ time
• Electricity: V = I × R; power = current × voltage; charge = current × time
• Force = mass × acceleration (F = ma)
• Weight = mass × gravitational field strength
• Work done = force × distance
• Wave speed = frequency × wavelength
• Density = mass ÷ volume

Recall is only half the battle

Knowing the equation is not enough — you also need to rearrange it, use the right units, and apply it to a problem. Practise selecting the correct equation from a worded question, which is where many marks are lost.

The fastest way to learn them

Use flashcards for the equations themselves (quantity on the front, equation on the back), then immediately practise applying each one to a question. Spaced repetition ensures the trickier equations keep coming back until they stick.

BrightRevision's GCSE Physics flashcards and quizzes drill both the equations and how to apply them, so you walk into the exam confident.