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RECTILINEAR ACCELERATION

CONTENT

  1. The Concept of Acceleration
  2. Uniform and Non-uniform Acceleration
  3. Deceleration
  4. Worked Examples on Acceleration and Deceleration
  5. Velocity-Time (V – T) Graph
  6. 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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