1.25P Momentum equation
Momentum is calculated by multiplying mass by velocity, using consistent units to give kilogram metres per second for moving objects.
- Syllabus
- 2024
- Objective
- 1.25
- Level
- —
Exam analysis
Chance of appearing26%of analysed past papers
Latest appearanceNovember 2025
Most common paperPaper2P
Typical marks1–2
Common command terms
- State
- Calculate
Scoring notes
- Common mistake
- Using m as the symbol for momentum instead of using p for momentum and m for mass.
Recent exam appearances
November 2025Paper2P [] · TZ03(a)(ii)[ 2 ]1.25P Momentum equation
November 2025Paper2P [] · TZ03(a)(i)[ 1 ]1.25P Momentum equation
May 2025Paper2PR [] · TZ05(b)(i)[ 4 ]1.25P Momentum equation
November 2024Paper2P [null] · TZ06(b)(ii)[ 3 ]1.25P Momentum equation
November 2024Paper2P [null] · TZ06(b)(i)[ 1 ]1.25P Momentum equation
Practice this objective
Coverage 2019–2025 · Updated 16 Jul 2026
1.25P Momentum equation
Know and use momentum = mass × velocity, p = mv.
Concept essentials
- Momentum is found from mass multiplied by velocity.
- The standard symbol equation is p = mv.
- Using kilograms and metres per second gives momentum in kg m/s.
- Velocity is zero at rest, so momentum is also zero at rest.
- Change in momentum requires initial and final momentum values, not just one speed.