Question

Please answer 9 only. Simple answer and simple explanation is needed, thanks.

Answer 1

a = -493.83 m/s²

Step-by-step explanation:

The acceleration can be calculated as:

`a=(v_f-v_i)/(t)`

Where vf is the final velocity, vi is the initial velocity and t is the time.

Then, we need to convert 320 km/h to m/s as follows:

Now, we can replace vf by 0 m/s, vi by 88.89 m/s, and t by 0.18 s to get an acceleration equal to:

`\begin{gathered} a=\frac{0-88.89\text{ m/s}}{0.18s}=\frac{-88.89\text{ m/s}}{0.18s}=-493.83m/s^2 \\ \end{gathered}`

Therefore, the acceleration that takes place in this time is equal to -493.83 m/s²