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.The change in momentum is equal to the final momentum - the initial momentum.Where the mass is constant (mv - mu)/t becomes m(v - u)/tIn other words, the rate of change of momentum is m a (mass × acceleration) since a = (v - u)/t.
The Rate of Change of Momentum
Read the text
Read the text and highlight anything you think is important. When you go on, the text is hidden and you answer from memory.
Specification: AQA Physics (7407), AS-level, 3.4.1.6 Momentum. Topic: Force and Momentum.
Key terms in this lesson
- Hooke's law
- The extension of a spring or wire is directly proportional to the force applied, provided the limit of proportionality is not exceeded.
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