BRAINCAKEMomentum
A force is needed to change the velocity of an object because the object has inertia or resistance to a change of motion.
momentum = mass × velocity
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Key terms in this lesson
- Vector quantity
- A physical quantity that has both magnitude and direction.
- Principle of conservation of momentum
- For a system of interacting objects, the total momentum before an interaction equals the total momentum after it, provided no external resultant force acts on the system.
- Resistance
- The ratio of the potential difference across a component to the current flowing through it, measured in ohms.
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
- 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