BRAINCAKEThe Rate of Change of Momentum
Newton's second law states that the rate of change of momentum is proportional to the resultant force on it.
Since momentum = mass × velocity, either the mass or the velocity can change with time for the momentum to change.
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Key terms in this lesson
- Newton's second law of motion
- The rate of change of momentum of an object is proportional to the resultant force acting on it, and takes place in the direction of that force.
- Momentum
- The product of an object's mass and its velocity; a vector quantity, conserved in any interaction provided no external resultant force acts.
More in Force and Momentum
- Momentum
- Momentum and Newtons Laws of Motion
- Definition of the Newton
- Constant vs Changing Mass
- Force-Time Graphs
- Force-Time Graphs for Impacts
- Rebound Impacts
- Newton's Third Law of Motion
All 16 lessons in Force and Momentum · All AQA AS-level Physics topics