This memory aid covers Memory Aid within Momentum for GCSE Physics. Revise Momentum in Forces for GCSE Physics with 13 exam-style questions and 6 flashcards. This is a high-frequency topic, so it is worth revising until the explanation feels precise and repeatable. It is section 8 of 12 in this topic. Use it for quick recall, then test yourself straight afterwards so the memory aid becomes usable in an answer.
Topic position
Section 8 of 12
Practice
13 questions
Recall
6 flashcards
🧠 Memory Aid
p = mv — "Pretend Mass is Velocity's bodyguard": Momentum (p) is calculated when mass (m) and velocity (v) work together. The unit kg m/s reminds you it includes both kg (mass) and m/s (velocity).
Conservation — "The Ledger Rule": Think of momentum like money in a ledger. It can be transferred between objects (like transferring money between accounts) but the TOTAL amount never changes — it's always balanced.
Direction tip: Pick one direction as positive (e.g., right = positive, left = negative). An object moving left has negative momentum. Stick to your chosen convention throughout the whole problem!