Formula Sheets: Stop Memorising Lists, Start Memorising Triggers

A naked formula like F = ma is useless on its own. The exam question is not "what is F?" — it's "a 5 kg block is pushed across a frictionless table…". You need the trigger that says "this is an F = ma question".

The trigger format

For each formula, write:

| Field | Example |

|---|---|

| Name | Newton's second law |

| Formula | F = ma |

| Use when | "Force needed to accelerate a mass" or "force on a single object" |

| Example | A 2 kg block accelerates at 3 m/s². Force = 6 N. |

| Trap | Make sure mass is in kg, not g. |

Five fields. Every formula. Done.

Build it once per topic

Formula Sheet builder outputs this format for your subject and grade. Pick your topic, hit generate, paste into a notebook.

How to revise from it

• Look at the Use when column, not the formula
• Cover the formula and try to write it from the trigger
• Cover the trigger and try to write triggers for the formula
• Two-way recall locks it in

Common mistake

Including too many formulas. If you have 40 formulas on one page for one topic, you have not understood the topic. The high-mark formulas are usually the same 5–8 per chapter. Cut the rest.