The formula to calculate the deceleration (D) is:
\[ D = \frac{{vi - vf}}{t} \]
Where:
Deceleration is defined as the rate of change of the reduction of speed of a moving object. It is essentially negative acceleration, indicating a decrease in velocity over time.
Let's assume the following values:
Using the formula to calculate the Deceleration (D):
\[ D = \frac{30 - 10}{5} = \frac{20}{5} = 4 \text{ m/s²} \]
The Deceleration (D) is 4 m/s².