Question

Question #ff1bb

Answer 1

`1.23m/s^2`

Explanation:

Acceleration is defined as change in the rate of velocity.

I.e `a= (dv)/(dt)`

Given, final velocity is `50 (Km)/(hr)` or `13.89 m/s`

And,initial velocity is `10 (Km)/(hr)` or `2.78 m/s`

And the time interval in which this change in velocity occurred is given as `9 s`

So,acceleration is `(13.89-2.78)/9m/s^2` or, `~~1.23 m/s^2`