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GCSE Combined Science · key term
The product of an object's mass and velocity. Momentum is a vector with the same direction as its velocity, measured in kg m/s.
Used by AQA and Edexcel
Specification 6.5.5.1, 6.5.5.2 · Paper 6
A property of a moving object equal to its mass multiplied by its velocity: . Momentum has both magnitude and direction and is measured in kg m/s.
Revise: Momentum PropertyMomentum is a property of a moving object, defined as its mass multiplied by its velocity. It depends on both how much mass is moving and how fast it is moving, including its direction.
Give momentum in kg m/s, not kg or m/s.
When comparing objects, calculate mass × velocity: the heavier or faster object does not necessarily have greater momentum.
Add the momentum of every object in the chosen system, both before and after the collision.
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The property of a moving object calculated using , where mass is measured in kilograms and velocity in metres per second. Momentum has a direction and is measured in kg m/s.
Paper 5, Paper 6
Revise: Vectors and scalarsMomentum depends on an object's mass and velocity, and its direction is the direction of the velocity. Energy, by contrast, has a measurable amount but no specific direction, so it is a scalar.
The product of an object’s mass and velocity: . Momentum is a vector quantity, measured in kilogram metres per second (kg m/s).