A car is traveling at 30 m/s in a straight line. The drive applies the brakes for 3 seconds and the car slows down to 12 m/s. What is the acceleration of the car?

The answer to your question is: - 6m/s²

Explanation:

Data

vo = 30 m/s

vf = 12 m/s

t = 3 s

a = ?

Formula

vf = vo + at

a = (vt - vo) / t

Process

a = (12 - 30) / 3 substitution

a = - 18 / 3 simplify

a = - 6 m/s² result, is negative because the car

is slowing down.