BRAINCAKEAcceleration
Acceleration is the rate of change of velocity.
The unit of acceleration is ms-2.
If a quantity changes at a constant rate, the change in the quantity is the final - initial value.
If the velocity changes at a constant rate, the change in velocity is the final - initial velocity.
The rate of change is the change over an interval Δt of time.
Hence, constant acceleration is given by:
where v is the final velocity, u is the initial velocity, a is acceleration and t is time
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Key terms in this lesson
- vector quantity
- A quantity that has both magnitude and direction.
- velocity
- The rate of change of displacement of an object; speed in a given direction.
More in Forces and Motion
- Average Speed
- Displacement and Velocity
- Displacement on a Velocity-time Graph
- Equations of Motion - Uniform Acceleration
- Free Fall Under Gravity
- Projectile Motion
- Car Stopping Distances
- Weight, Mass, Accleration
All 17 lessons in Forces and Motion · All OCR AS-level Physics topics