BRAINCAKEForce-Time Graphs
Newton's second law can be written as force = rate of change of momentum, F = Δ(mv)/Δt. Rearranging gives FΔt = Δ(mv). The product of force and the time for which it acts is called the impulse.
Impulse equals the change in momentum. Its unit is the newton second (N s), which is equivalent to kg m s-1.
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Key terms in this lesson
- 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 and Newtons Laws of Motion
- The Rate of Change of Momentum
- Definition of the Newton
- Constant vs Changing Mass
- Force-Time Graphs for Impacts
- Rebound Impacts
- Newton's Third Law of Motion
- The Principle of Conservation of Momentum
All 16 lessons in Force and Momentum · All AQA AS-level Physics topics