This key facts covers Key Facts About Momentum 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 2 of 12 in this topic. Use this key facts to connect the idea to the wider topic before moving on to questions and flashcards.
Topic position
Section 2 of 12
Practice
13 questions
Recall
6 flashcards
📚 Key Facts About Momentum
p = m × v
Momentum (kg m/s) = mass (kg) × velocity (m/s)
Properties:
- Unit: kg m/s (kilogram metres per second)
- Momentum is a VECTOR — has direction
- Direction = direction of velocity
- Can be positive or negative (opposite directions)
Conservation of Momentum:
- In a closed system (no external forces)
- Total momentum BEFORE = Total momentum AFTER
- Works for collisions AND explosions