BRAINCAKENewton's First Law of Motion.
An object will remain at rest or continue to move at constant velocity unless acted on by a resultant force. Velocity is a vector quantity so if an objects speed changes or the objects direction changes then the velocity changes.
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Key terms in this lesson
- vector quantity
- A quantity that has both magnitude and direction.
- resultant
- The single force or vector that has the same effect as two or more forces or vectors acting together.
- velocity
- The rate of change of displacement of an object; speed in a given direction.
More in Momentum
- Newton's Second Law of Motion
- Newton's Third Law of Motion
- The Four Fundamental Forces
- Linear Momentum
- Conservation of Momentum
- Explosions vs Collisions
- Elastic and Inelastic Collisions
- Air Bags
All 14 lessons in Momentum · All OCR AS-level Physics topics