RECTILINEAR ACCELERATION
CONTENT
- The Concept of Acceleration
- Uniform and Non-uniform Acceleration
- Deceleration
- Worked Examples on Acceleration and Deceleration
- Velocity-Time (V – T) Graph
- Worked Examples on V-T Graph
The Concept of Acceleration
When an object increases or changes its velocity within a set time, the object is said to undergo acceleration (or to accelerate). We therefore define acceleration as the rate of change of velocity with time.
\(Acceleration = {\text{Change in Velocity} \over \text{Time taken}} \\ a = \frac{v – u}{t}\)
Where a: acceleration
v: final velocity
u: initial velocity
Acceleration is a vector quantity and its SI unit is \(m/s^2\)
However, be reminded that:
(i) When a body starts from rest, its initial velocity, ‘u’ is zero.
(ii) When a body comes to rest, its final velocity, ‘v’ is zero.
Uniform and Non-uniform Acceleration
Acceleration is said to be uniform if the velocity increases by equal amounts in equal intervals of time.
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