Question

How much time will it take for the car to stop if it Decelerates?

Answer 1

Given that the initial velocity is

`v_i=\text{ 45 m/s}`

The final velocity is

`v_f=\text{ 0 m/s}`

The acceleration is a = -4 m/s^2

We have to find the time taken to stop the car completely.

The formula to calculate time is

`t=\text{ }((v_f-v_i))/(a)`

Substituting the values, the time will be

`\begin{gathered} t=(0-45)/(-4) \\ =11.25\text{ s} \end{gathered}`

Thus, the time taken is 11.25 s