Question

A truck is moving 14 m/s to the south. If it takes the truck 20 seconds to reduce its velocity to 10 m/s south, what is its acceleration?

Answer 1

`-0.2m`/`s^2`

Explanation:

What is given to us?
Initial velocity: `14m`/`s`
Final velocity: `10m`/`s`
Time: `20s`

We can use the equation Vf=Vi+at

`10=14+20(a)`

`-4=20(a)`

`-4/20=a`

`-0.2=a`