Quick Notes

• 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

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

What is its acceleration?

Answers:

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