Acceleration

 
9.2   Acceleration
 
  Definition  
     
 
  • Acceleration is the rate of change of speed with time, in a linear motion
  • Deceleration is the opposite of acceleration, where the speed reduction occurs
 
 
Formula
 
\(\text{Acceleration} = \dfrac{\text{Speed}}{\text{time}}\)
 
  Example  
     
 

A car takes \(8\text{ seconds}\) to its velocity from \(10\text{ m/s}\) to \(30\text{ m/s}\).

What is its acceleration?

 
     
 

Answers:

\(\begin{aligned}\text{Acceleration} &= \dfrac{(30-10)\text{ m/s}}{8\text{ s}} \\\\&=2.5\text{ m/s}^2. \end{aligned}\)