Question

Find the average acceleration of a northbound subway train that takes 0.90 seconds to go from 12 m/s to 4.5 m/s.

Answer 1

a= -8.33

Explanation:

it will be deceleration because he was 12 m/s then go to 4.5 m/s

and by applying moving equation

`v_(2)`=
`v_(1)`+at

we have all but not have a