Answer:
west
Explanation:
We can take east as positive (+) direction and west as negative (-) direction. With this sign convention, we have:
- Initial velocity: u = +20 m/s (due east)
- Final velocity: v = -20 m/s (due west)
- Time taken to change velocity: t = 10 s
Therefore, we can use the formula for the acceleration to calculate the car's acceleration:
[tex]a=\frac{v-u}{t}=\frac{(-20 m/s)-(+20 m/s)}{10 s}=\frac{-40 m/s}{10 s}=-4 m/s^2[/tex]
And the negative sign means the direction of the car's acceleration is west.
